* RE: regression: nvme rdma with bnxt_re0 broken
From: Parav Pandit @ 2019-07-12 12:52 UTC (permalink / raw)
To: Yi Zhang, Selvin Xavier
Cc: Daniel Jurgens, linux-rdma@vger.kernel.org, Devesh Sharma,
linux-nvme@lists.infradead.org
In-Reply-To: <ef6a01a1-9163-ef4e-29ac-4f4130c682f1@redhat.com>
> -----Original Message-----
> From: Yi Zhang <yi.zhang@redhat.com>
> Sent: Friday, July 12, 2019 5:11 PM
> To: Parav Pandit <parav@mellanox.com>; Selvin Xavier
> <selvin.xavier@broadcom.com>
> Cc: Daniel Jurgens <danielj@mellanox.com>; linux-rdma@vger.kernel.org;
> Devesh Sharma <devesh.sharma@broadcom.com>; linux-
> nvme@lists.infradead.org
> Subject: Re: regression: nvme rdma with bnxt_re0 broken
>
> Hi Parav
> The nvme connect still failed[1], I've paste all the dmesg log to[2], pls check it.
>
>
> [1]
> [root@rdma-perf-07 ~]$ nvme connect -t rdma -a 172.31.40.125 -s 4420 -n
> testnqn
> Failed to write to /dev/nvme-fabrics: Connection reset by peer
> [2]
> https://pastebin.com/ipvak0Sp
>
I think vlan_id is not initialized to 0xffff due to which ipv4 entry addition also failed with my patch.
This is probably solves it. Not sure. I am not much familiar with it.
Selvin,
Can you please take a look?
From 7b55e1d4500259cf7c02fb4d9fbbeb5ad1cfc623 Mon Sep 17 00:00:00 2001
From: Parav Pandit <parav@mellanox.com>
Date: Fri, 12 Jul 2019 04:34:52 -0500
Subject: [PATCH v1] IB/bnxt_re: Honor vlan_id in GID entry comparison
GID entry consist of GID, vlan, netdev and smac.
Extend GID duplicate check companions to consider vlan_id as well
to support IPv6 VLAN based link local addresses.
GID deletion based on only GID comparision is not correct.
It needs further fixes.
Fixes: 823b23da7113 ("IB/core: Allow vlan link local address based RoCE GIDs")
Change-Id: I2e026ec8065c8425ba24fad8525323d112a2f4e4
Signed-off-by: Parav Pandit <parav@mellanox.com>
---
drivers/infiniband/hw/bnxt_re/qplib_res.c | 5 +++++
drivers/infiniband/hw/bnxt_re/qplib_sp.c | 7 ++++++-
drivers/infiniband/hw/bnxt_re/qplib_sp.h | 1 +
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c
index 37928b1111df..216648b640ce 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_res.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c
@@ -488,6 +488,8 @@ static int bnxt_qplib_alloc_sgid_tbl(struct bnxt_qplib_res *res,
struct bnxt_qplib_sgid_tbl *sgid_tbl,
u16 max)
{
+ u16 i;
+
sgid_tbl->tbl = kcalloc(max, sizeof(struct bnxt_qplib_gid), GFP_KERNEL);
if (!sgid_tbl->tbl)
return -ENOMEM;
@@ -500,6 +502,9 @@ static int bnxt_qplib_alloc_sgid_tbl(struct bnxt_qplib_res *res,
if (!sgid_tbl->ctx)
goto out_free2;
+ for (i = 0; i < max; i++)
+ sgid_tbl->tbl[i].vlan_id = 0xffff;
+
sgid_tbl->vlan = kcalloc(max, sizeof(u8), GFP_KERNEL);
if (!sgid_tbl->vlan)
goto out_free3;
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
index 48793d3512ac..0d90be88685f 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
@@ -236,6 +236,9 @@ int bnxt_qplib_del_sgid(struct bnxt_qplib_sgid_tbl *sgid_tbl,
return -ENOMEM;
}
for (index = 0; index < sgid_tbl->max; index++) {
+ /* FIXME: GID delete should happen based on index
+ * and refcount
+ */
if (!memcmp(&sgid_tbl->tbl[index], gid, sizeof(*gid)))
break;
}
@@ -296,7 +299,8 @@ int bnxt_qplib_add_sgid(struct bnxt_qplib_sgid_tbl *sgid_tbl,
}
free_idx = sgid_tbl->max;
for (i = 0; i < sgid_tbl->max; i++) {
- if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid))) {
+ if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid)) &&
+ sgid_tbl->tbl[i].vlan_id == vlan_id) {
dev_dbg(&res->pdev->dev,
"SGID entry already exist in entry %d!\n", i);
*index = i;
@@ -351,6 +355,7 @@ int bnxt_qplib_add_sgid(struct bnxt_qplib_sgid_tbl *sgid_tbl,
}
/* Add GID to the sgid_tbl */
memcpy(&sgid_tbl->tbl[free_idx], gid, sizeof(*gid));
+ sgid_tbl->tbl[free_idx].vlan_id = vlan_id;
sgid_tbl->active++;
if (vlan_id != 0xFFFF)
sgid_tbl->vlan[free_idx] = 1;
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.h b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
index 0ec3b12b0bcd..7a1957c9dc6f 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
@@ -82,6 +82,7 @@ struct bnxt_qplib_pd {
struct bnxt_qplib_gid {
u8 data[16];
+ u16 vlan_id;
};
struct bnxt_qplib_ah {
--
2.19.2
^ permalink raw reply related
* Re: Re: [PATCH] rdma/siw: avoid smp_store_mb() on a u64
From: Bernard Metzler @ 2019-07-12 12:27 UTC (permalink / raw)
To: Jason Gunthorpe
Cc: Arnd Bergmann, Doug Ledford, Peter Zijlstra, linux-rdma,
linux-kernel
In-Reply-To: <20190712120328.GB27512@ziepe.ca>
-----"Jason Gunthorpe" <jgg@ziepe.ca> wrote: -----
>To: "Bernard Metzler" <BMT@zurich.ibm.com>
>From: "Jason Gunthorpe" <jgg@ziepe.ca>
>Date: 07/12/2019 02:03PM
>Cc: "Arnd Bergmann" <arnd@arndb.de>, "Doug Ledford"
><dledford@redhat.com>, "Peter Zijlstra" <peterz@infradead.org>,
>linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org
>Subject: [EXTERNAL] Re: [PATCH] rdma/siw: avoid smp_store_mb() on a
>u64
>
>On Fri, Jul 12, 2019 at 11:33:46AM +0000, Bernard Metzler wrote:
>> >diff --git a/drivers/infiniband/sw/siw/siw_verbs.c
>> >b/drivers/infiniband/sw/siw/siw_verbs.c
>> >index 32dc79d0e898..41c5ab293fe1 100644
>> >+++ b/drivers/infiniband/sw/siw/siw_verbs.c
>> >@@ -1142,10 +1142,11 @@ int siw_req_notify_cq(struct ib_cq
>*base_cq,
>> >enum ib_cq_notify_flags flags)
>> >
>> > if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
>> > /* CQ event for next solicited completion */
>> >- smp_store_mb(*cq->notify, SIW_NOTIFY_SOLICITED);
>> >+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_SOLICITED);
>> > else
>> > /* CQ event for any signalled completion */
>> >- smp_store_mb(*cq->notify, SIW_NOTIFY_ALL);
>> >+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_ALL);
>> >+ smp_wmb();
>> >
>> > if (flags & IB_CQ_REPORT_MISSED_EVENTS)
>> > return cq->cq_put - cq->cq_get;
>>
>>
>> Hi Arnd,
>> Many thanks for pointing that out! Indeed, this CQ notification
>> mechanism does not take 32 bit architectures into account.
>> Since we have only three flags to hold here, it's probably better
>> to make it a 32bit value. That would remove the issue w/o
>> introducing extra smp_wmb().
>
>I also prefer not to see smp_wmb() in drivers..
>
>> I'd prefer smp_store_mb(), since on some architectures it shall be
>> more efficient. That would also make it sufficient to use
>> READ_ONCE.
>
>The READ_ONCE is confusing to me too, if you need store_release
>semantics then the reader also needs to pair with load_acquite -
>otherwise it doesn't work.
>
I used READ_ONCE since it is a potentially user land shared
object. Since we are under spinlock, we might just do a matching
WRITE_ONCE instead of the smp_store_mb() ??
Many thanks!
Bernard.
>Still, we need to do something rapidly to fix the i386 build, please
>revise right away..
>
>Jason
>
>
^ permalink raw reply
* Re: [PATCH] rdma/siw: avoid smp_store_mb() on a u64
From: Jason Gunthorpe @ 2019-07-12 12:03 UTC (permalink / raw)
To: Bernard Metzler
Cc: Arnd Bergmann, Doug Ledford, Peter Zijlstra, linux-rdma,
linux-kernel
In-Reply-To: <OF05C1A780.433E36D1-ON00258435.003381DA-00258435.003F847E@notes.na.collabserv.com>
On Fri, Jul 12, 2019 at 11:33:46AM +0000, Bernard Metzler wrote:
> >diff --git a/drivers/infiniband/sw/siw/siw_verbs.c
> >b/drivers/infiniband/sw/siw/siw_verbs.c
> >index 32dc79d0e898..41c5ab293fe1 100644
> >+++ b/drivers/infiniband/sw/siw/siw_verbs.c
> >@@ -1142,10 +1142,11 @@ int siw_req_notify_cq(struct ib_cq *base_cq,
> >enum ib_cq_notify_flags flags)
> >
> > if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
> > /* CQ event for next solicited completion */
> >- smp_store_mb(*cq->notify, SIW_NOTIFY_SOLICITED);
> >+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_SOLICITED);
> > else
> > /* CQ event for any signalled completion */
> >- smp_store_mb(*cq->notify, SIW_NOTIFY_ALL);
> >+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_ALL);
> >+ smp_wmb();
> >
> > if (flags & IB_CQ_REPORT_MISSED_EVENTS)
> > return cq->cq_put - cq->cq_get;
>
>
> Hi Arnd,
> Many thanks for pointing that out! Indeed, this CQ notification
> mechanism does not take 32 bit architectures into account.
> Since we have only three flags to hold here, it's probably better
> to make it a 32bit value. That would remove the issue w/o
> introducing extra smp_wmb().
I also prefer not to see smp_wmb() in drivers..
> I'd prefer smp_store_mb(), since on some architectures it shall be
> more efficient. That would also make it sufficient to use
> READ_ONCE.
The READ_ONCE is confusing to me too, if you need store_release
semantics then the reader also needs to pair with load_acquite -
otherwise it doesn't work.
Still, we need to do something rapidly to fix the i386 build, please
revise right away..
Jason
^ permalink raw reply
* Re: [PATCH] rdma/siw: avoid smp_store_mb() on a u64
From: Peter Zijlstra @ 2019-07-12 11:47 UTC (permalink / raw)
To: Bernard Metzler
Cc: Arnd Bergmann, Doug Ledford, Jason Gunthorpe, Jason Gunthorpe,
linux-rdma, linux-kernel
In-Reply-To: <OF05C1A780.433E36D1-ON00258435.003381DA-00258435.003F847E@notes.na.collabserv.com>
On Fri, Jul 12, 2019 at 11:33:46AM +0000, Bernard Metzler wrote:
> Many thanks for pointing that out! Indeed, this CQ notification
> mechanism does not take 32 bit architectures into account.
> Since we have only three flags to hold here, it's probably better
> to make it a 32bit value. That would remove the issue w/o
> introducing extra smp_wmb(). I'd prefer smp_store_mb(),
> since on some architectures it shall be more efficient.
> That would also make it sufficient to use READ_ONCE.
>
The below fails review due to a distinct lack of comments describing the
memory ordering.
Describe which variables (at least two) are ordered how and what
guarantees that provides and how that helps.
> From c7c3e2dbc3555581be52cb5d76c15726dced0331 Mon Sep 17 00:00:00 2001
> From: Bernard Metzler <bmt@zurich.ibm.com>
> Date: Fri, 12 Jul 2019 13:19:27 +0200
> Subject: [PATCH] Make shared CQ notification flags 32bit to respect 32bit
> architectures
>
> Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
> ---
> drivers/infiniband/sw/siw/siw.h | 2 +-
> drivers/infiniband/sw/siw/siw_qp.c | 6 +++---
> drivers/infiniband/sw/siw/siw_verbs.c | 6 +++---
> include/uapi/rdma/siw-abi.h | 3 ++-
> 4 files changed, 9 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/infiniband/sw/siw/siw.h b/drivers/infiniband/sw/siw/siw.h
> index 409e2987cd45..d59d81f4d86b 100644
> --- a/drivers/infiniband/sw/siw/siw.h
> +++ b/drivers/infiniband/sw/siw/siw.h
> @@ -216,7 +216,7 @@ struct siw_wqe {
> struct siw_cq {
> struct ib_cq base_cq;
> spinlock_t lock;
> - u64 *notify;
> + struct siw_cq_ctrl *notify;
> struct siw_cqe *queue;
> u32 cq_put;
> u32 cq_get;
> diff --git a/drivers/infiniband/sw/siw/siw_qp.c b/drivers/infiniband/sw/siw/siw_qp.c
> index 83e50fe8e48b..0fcc5002d2da 100644
> --- a/drivers/infiniband/sw/siw/siw_qp.c
> +++ b/drivers/infiniband/sw/siw/siw_qp.c
> @@ -1011,18 +1011,18 @@ int siw_activate_tx(struct siw_qp *qp)
> */
> static bool siw_cq_notify_now(struct siw_cq *cq, u32 flags)
> {
> - u64 cq_notify;
> + u32 cq_notify;
>
> if (!cq->base_cq.comp_handler)
> return false;
>
> - cq_notify = READ_ONCE(*cq->notify);
> + cq_notify = READ_ONCE(cq->notify->flags);
>
> if ((cq_notify & SIW_NOTIFY_NEXT_COMPLETION) ||
> ((cq_notify & SIW_NOTIFY_SOLICITED) &&
> (flags & SIW_WQE_SOLICITED))) {
> /* dis-arm CQ */
> - smp_store_mb(*cq->notify, SIW_NOTIFY_NOT);
> + smp_store_mb(cq->notify->flags, SIW_NOTIFY_NOT);
>
> return true;
> }
> diff --git a/drivers/infiniband/sw/siw/siw_verbs.c b/drivers/infiniband/sw/siw/siw_verbs.c
> index d4fb78780765..bc6892229af0 100644
> --- a/drivers/infiniband/sw/siw/siw_verbs.c
> +++ b/drivers/infiniband/sw/siw/siw_verbs.c
> @@ -1049,7 +1049,7 @@ int siw_create_cq(struct ib_cq *base_cq, const struct ib_cq_init_attr *attr,
>
> spin_lock_init(&cq->lock);
>
> - cq->notify = &((struct siw_cq_ctrl *)&cq->queue[size])->notify;
> + cq->notify = (struct siw_cq_ctrl *)&cq->queue[size];
>
> if (udata) {
> struct siw_uresp_create_cq uresp = {};
> @@ -1142,10 +1142,10 @@ int siw_req_notify_cq(struct ib_cq *base_cq, enum ib_cq_notify_flags flags)
>
> if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
> /* CQ event for next solicited completion */
> - smp_store_mb(*cq->notify, SIW_NOTIFY_SOLICITED);
> + smp_store_mb(cq->notify->flags, SIW_NOTIFY_SOLICITED);
> else
> /* CQ event for any signalled completion */
> - smp_store_mb(*cq->notify, SIW_NOTIFY_ALL);
> + smp_store_mb(cq->notify->flags, SIW_NOTIFY_ALL);
>
> if (flags & IB_CQ_REPORT_MISSED_EVENTS)
> return cq->cq_put - cq->cq_get;
> diff --git a/include/uapi/rdma/siw-abi.h b/include/uapi/rdma/siw-abi.h
> index ba4d5315cb76..93298980d3a7 100644
> --- a/include/uapi/rdma/siw-abi.h
> +++ b/include/uapi/rdma/siw-abi.h
> @@ -178,6 +178,7 @@ struct siw_cqe {
> * to control CQ arming.
> */
> struct siw_cq_ctrl {
> - __aligned_u64 notify;
> + __u32 flags;
> + __u32 pad;
> };
> #endif
> --
> 2.17.2
>
>
^ permalink raw reply
* Re: regression: nvme rdma with bnxt_re0 broken
From: Yi Zhang @ 2019-07-12 11:41 UTC (permalink / raw)
To: Parav Pandit, Selvin Xavier
Cc: Daniel Jurgens, linux-rdma@vger.kernel.org, Devesh Sharma,
linux-nvme@lists.infradead.org
In-Reply-To: <AM0PR05MB4866665D5CACB34AE885BCA2D1F20@AM0PR05MB4866.eurprd05.prod.outlook.com>
Hi Parav
The nvme connect still failed[1], I've paste all the dmesg log to[2],
pls check it.
[1]
[root@rdma-perf-07 ~]$ nvme connect -t rdma -a 172.31.40.125 -s 4420 -n
testnqn
Failed to write to /dev/nvme-fabrics: Connection reset by peer
[2]
https://pastebin.com/ipvak0Sp
Thanks
Yi
On 7/12/19 5:49 PM, Parav Pandit wrote:
>>> Hi Selvin,
>>>
>>>> -----Original Message-----
>>>> From: Selvin Xavier <selvin.xavier@broadcom.com>
>>>> Sent: Friday, July 12, 2019 9:16 AM
>>>> To: Parav Pandit <parav@mellanox.com>
>>>> Cc: Yi Zhang <yi.zhang@redhat.com>; linux-nvme@lists.infradead.org;
>>>> Daniel Jurgens <danielj@mellanox.com>; linux-rdma@vger.kernel.org;
>>>> Devesh Sharma <devesh.sharma@broadcom.com>
>>>> Subject: Re: regression: nvme rdma with bnxt_re0 broken
>>>>
>>>> On Fri, Jul 12, 2019 at 8:19 AM Parav Pandit <parav@mellanox.com>
>> wrote:
>>>>> GID table looks fine.
>>>>>
>>>> The GID table has fe80:0000:0000:0000:020a:f7ff:fee3:6e32 entry
>>>> repeated 6 times. 2 for each interface bnxt_roce, bnxt_roce.43 and
>>>> bnxt_roce.45. Is this expected to have same gid entries for vlan and
>>>> base interfaces? As you mentioned earlier, driver's assumption that
>>>> only 2 GID entries identical (one for RoCE v1 and one for RoCE
>>>> v2) is breaking here.
>>>>
>>> Yes, this is correct behavior. Each vlan netdev interface is in
>>> different L2 segment.
>>> Vlan netdev has this ipv6 link local address. Hence, it is added to the GID
>> table.
>>> A given GID table entry is identified uniquely by GID+ndev+type(v1/v2).
>>>
>>> Reviewing bnxt_qplib_add_sgid() does the comparison below.
>>> if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid))) {
>>>
>>> This comparison looks incomplete which ignore netdev and type.
>>> But even with that, I would expect GID entry addition failure for
>>> vlans for ipv6 link local entries.
>>>
>>> But I am puzzled now, that , with above memcmp() check, how does both
>>> v1 and v2 entries get added in your table and for vlans too?
>>> I expect add_gid() and core/cache.c add_roce_gid () to fail for the
>>> duplicate entry.
>>> But GID table that Yi Zhang dumped has these vlan entries.
>>> I am missing something.
>>>
>> Ah, found it.
>> bnxt_re_add_gid() checks for -EALREADY and returns 0 to add_gid() callback.
>> Ok. so you just need to extend bnxt_qplib_add_sgid() for considering vlan too.
>> Let me see if I can share a patch in few minutes.
>>
>>> Yi Zhang,
>>> Instead of last 15 lines of dmesg, can you please share the whole dmsg
>>> log which should be enabled before creating vlans.
>>> using
>>> echo -n "module ib_core +p" /sys/kernel/debug/dynamic_debug/control
>>>
>>> Selvin,
>>> Additionally, driver shouldn't be looking at the duplicate entries.
>>> core already does it.
>>> You might only want to do for v1/v2 case as bnxt driver has some
>>> dependency with it.
>>> Can you please fix this part?
>>>
> How about below fix?
>
> From f3f17008d34b5a0c38c190010281a3030a8e5771 Mon Sep 17 00:00:00 2001
> From: Parav Pandit <parav@mellanox.com>
> Date: Fri, 12 Jul 2019 04:34:52 -0500
> Subject: [PATCH] IB/bnxt_re: Honor vlan_id in GID entry comparision
>
> GID entry consist of GID, vlan, netdev and smac.
> Extend GID duplicate check comparions to consider vlan_id as well
> to support IPv6 VLAN based link local addresses.
>
> Fixes: 823b23da7113 ("IB/core: Allow vlan link local address based RoCE GIDs")
> Change-Id: I2e026ec8065c8425ba24fad8525323d112a2f4e4
> Signed-off-by: Parav Pandit <parav@mellanox.com>
> ---
> drivers/infiniband/hw/bnxt_re/qplib_sp.c | 4 +++-
> drivers/infiniband/hw/bnxt_re/qplib_sp.h | 1 +
> 2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
> index 48793d3512ac..8567b7367669 100644
> --- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
> +++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
> @@ -296,7 +296,8 @@ int bnxt_qplib_add_sgid(struct bnxt_qplib_sgid_tbl *sgid_tbl,
> }
> free_idx = sgid_tbl->max;
> for (i = 0; i < sgid_tbl->max; i++) {
> - if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid))) {
> + if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid)) &&
> + sgid_tbl->tbl[i].vlan_id == vlan_id) {
> dev_dbg(&res->pdev->dev,
> "SGID entry already exist in entry %d!\n", i);
> *index = i;
> @@ -351,6 +352,7 @@ int bnxt_qplib_add_sgid(struct bnxt_qplib_sgid_tbl *sgid_tbl,
> }
> /* Add GID to the sgid_tbl */
> memcpy(&sgid_tbl->tbl[free_idx], gid, sizeof(*gid));
> + sgid_tbl->tbl[free_idx].vlan_id = vlan_id;
> sgid_tbl->active++;
> if (vlan_id != 0xFFFF)
> sgid_tbl->vlan[free_idx] = 1;
> diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.h b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
> index 0ec3b12b0bcd..7a1957c9dc6f 100644
> --- a/drivers/infiniband/hw/bnxt_re/qplib_sp.h
> +++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
> @@ -82,6 +82,7 @@ struct bnxt_qplib_pd {
>
> struct bnxt_qplib_gid {
> u8 data[16];
> + u16 vlan_id;
> };
>
> struct bnxt_qplib_ah {
^ permalink raw reply
* Re: [PATCH] rdma/siw: fix enum type mismatch warnings
From: Bernard Metzler @ 2019-07-12 11:38 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Doug Ledford, Jason Gunthorpe, Jason Gunthorpe, linux-rdma,
linux-kernel
In-Reply-To: <20190712085314.3974907-1-arnd@arndb.de>
-----"Arnd Bergmann" <arnd@arndb.de> wrote: -----
>To: "Bernard Metzler" <bmt@zurich.ibm.com>, "Doug Ledford"
><dledford@redhat.com>, "Jason Gunthorpe" <jgg@ziepe.ca>
>From: "Arnd Bergmann" <arnd@arndb.de>
>Date: 07/12/2019 10:53AM
>Cc: "Arnd Bergmann" <arnd@arndb.de>, "Jason Gunthorpe"
><jgg@mellanox.com>, linux-rdma@vger.kernel.org,
>linux-kernel@vger.kernel.org
>Subject: [EXTERNAL] [PATCH] rdma/siw: fix enum type mismatch warnings
>
>The values in map_cqe_status[] don't match the type:
>
>drivers/infiniband/sw/siw/siw_cq.c:31:4: error: implicit conversion
>from enumeration type 'enum siw_wc_status' to different enumeration
>type 'enum siw_opcode' [-Werror,-Wenum-conversion]
> { SIW_WC_SUCCESS, IB_WC_SUCCESS },
> ~ ^~~~~~~~~~~~~~
>drivers/infiniband/sw/siw/siw_cq.c:32:4: error: implicit conversion
>from enumeration type 'enum siw_wc_status' to different enumeration
>type 'enum siw_opcode' [-Werror,-Wenum-conversion]
> { SIW_WC_LOC_LEN_ERR, IB_WC_LOC_LEN_ERR },
> ~ ^~~~~~~~~~~~~~~~~~
>
>Change the struct definition to make them match and stop the
>warning.
>
>Fixes: b0fff7317bb4 ("rdma/siw: completion queue methods")
>Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>---
> drivers/infiniband/sw/siw/siw_cq.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/infiniband/sw/siw/siw_cq.c
>b/drivers/infiniband/sw/siw/siw_cq.c
>index e2a0ee40d5b5..e381ae9b7d62 100644
>--- a/drivers/infiniband/sw/siw/siw_cq.c
>+++ b/drivers/infiniband/sw/siw/siw_cq.c
>@@ -25,7 +25,7 @@ static int map_wc_opcode[SIW_NUM_OPCODES] = {
> };
>
> static struct {
>- enum siw_opcode siw;
>+ enum siw_wc_status siw;
> enum ib_wc_status ib;
> } map_cqe_status[SIW_NUM_WC_STATUS] = {
> { SIW_WC_SUCCESS, IB_WC_SUCCESS },
>--
>2.20.0
>
>
Hi Arnd, this got already fixed.
Many thanks!
Bernard.
^ permalink raw reply
* Re: [PATCH] rdma/siw: select CONFIG_DMA_VIRT_OPS
From: Bernard Metzler @ 2019-07-12 11:36 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Doug Ledford, Jason Gunthorpe, Jason Gunthorpe, linux-rdma,
linux-kernel
In-Reply-To: <20190712085253.3965945-1-arnd@arndb.de>
Hi Arnd, this got already fixed.
Many thanks!
Bernard.
-----"Arnd Bergmann" <arnd@arndb.de> wrote: -----
>To: "Bernard Metzler" <bmt@zurich.ibm.com>, "Doug Ledford"
><dledford@redhat.com>, "Jason Gunthorpe" <jgg@ziepe.ca>
>From: "Arnd Bergmann" <arnd@arndb.de>
>Date: 07/12/2019 10:53AM
>Cc: "Arnd Bergmann" <arnd@arndb.de>, "Jason Gunthorpe"
><jgg@mellanox.com>, linux-rdma@vger.kernel.org,
>linux-kernel@vger.kernel.org
>Subject: [EXTERNAL] [PATCH] rdma/siw: select CONFIG_DMA_VIRT_OPS
>
>Without this symbol we get a link failure:
>
>ERROR: "dma_virt_ops" [drivers/infiniband/sw/siw/siw.ko] undefined!
>
>Fixes: bdcf26bf9b3a ("rdma/siw: network and RDMA core interface")
>Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>---
> drivers/infiniband/sw/siw/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
>diff --git a/drivers/infiniband/sw/siw/Kconfig
>b/drivers/infiniband/sw/siw/Kconfig
>index 94f684174ce3..ea282789f466 100644
>--- a/drivers/infiniband/sw/siw/Kconfig
>+++ b/drivers/infiniband/sw/siw/Kconfig
>@@ -1,6 +1,7 @@
> config RDMA_SIW
> tristate "Software RDMA over TCP/IP (iWARP) driver"
> depends on INET && INFINIBAND && CRYPTO_CRC32
>+ select DMA_VIRT_OPS
> help
> This driver implements the iWARP RDMA transport over
> the Linux TCP/IP network stack. It enables a system with a
>--
>2.20.0
>
>
^ permalink raw reply
* Re: [PATCH] rdma/siw: avoid smp_store_mb() on a u64
From: Bernard Metzler @ 2019-07-12 11:33 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Doug Ledford, Jason Gunthorpe, Peter Zijlstra, Jason Gunthorpe,
linux-rdma, linux-kernel
In-Reply-To: <20190712085212.3901785-1-arnd@arndb.de>
-----"Arnd Bergmann" <arnd@arndb.de> wrote: -----
>To: "Bernard Metzler" <bmt@zurich.ibm.com>, "Doug Ledford"
><dledford@redhat.com>, "Jason Gunthorpe" <jgg@ziepe.ca>
>From: "Arnd Bergmann" <arnd@arndb.de>
>Date: 07/12/2019 10:52AM
>Cc: "Arnd Bergmann" <arnd@arndb.de>, "Peter Zijlstra"
><peterz@infradead.org>, "Jason Gunthorpe" <jgg@mellanox.com>,
>linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org
>Subject: [EXTERNAL] [PATCH] rdma/siw: avoid smp_store_mb() on a u64
>
>The new siw driver fails to build on i386 with
>
>drivers/infiniband/sw/siw/siw_qp.c:1025:3: error: invalid output size
>for constraint '+q'
> smp_store_mb(*cq->notify, SIW_NOTIFY_NOT);
> ^
>include/asm-generic/barrier.h:141:35: note: expanded from macro
>'smp_store_mb'
> #define smp_store_mb(var, value) __smp_store_mb(var, value)
> ^
>arch/x86/include/asm/barrier.h:65:47: note: expanded from macro
>'__smp_store_mb'
> #define __smp_store_mb(var, value) do { (void)xchg(&var, value); }
>while (0)
> ^
>include/asm-generic/atomic-instrumented.h:1648:2: note: expanded from
>macro 'xchg'
> arch_xchg(__ai_ptr, __VA_ARGS__);
> \
> ^
>arch/x86/include/asm/cmpxchg.h:78:27: note: expanded from macro
>'arch_xchg'
> #define arch_xchg(ptr, v) __xchg_op((ptr), (v), xchg, "")
> ^
>arch/x86/include/asm/cmpxchg.h:48:19: note: expanded from macro
>'__xchg_op'
> : "+q" (__ret), "+m" (*(ptr))
> \
> ^
>drivers/infiniband/sw/siw/siw_qp.o: In function `siw_sqe_complete':
>siw_qp.c:(.text+0x1450): undefined reference to `__xchg_wrong_size'
>drivers/infiniband/sw/siw/siw_qp.o: In function `siw_rqe_complete':
>siw_qp.c:(.text+0x15b0): undefined reference to `__xchg_wrong_size'
>drivers/infiniband/sw/siw/siw_verbs.o: In function
>`siw_req_notify_cq':
>siw_verbs.c:(.text+0x18ff): undefined reference to
>`__xchg_wrong_size'
>
>Since smp_store_mb() has to be an atomic store, but the architecture
>can only do this on 32-bit quantities or smaller, but 'cq->notify'
>is a 64-bit word.
>
>Apparently the smp_store_mb() is paired with a READ_ONCE() here,
>which
>seems like an odd choice because there is only a barrier on the
>writer
>side and not the reader, and READ_ONCE() is already not atomic on
>quantities larger than a CPU register.
>
>I suspect it is sufficient to use the (possibly nonatomic)
>WRITE_ONCE()
>and an SMP memory barrier here. If it does need to be atomic as well
>as 64-bit quantities, using an
>atomic64_set_release()/atomic64_read_acquire()
>may be a better choice.
>
>Fixes: 303ae1cdfdf7 ("rdma/siw: application interface")
>Fixes: f29dd55b0236 ("rdma/siw: queue pair methods")
>Cc: Peter Zijlstra <peterz@infradead.org>
>Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>---
> drivers/infiniband/sw/siw/siw_qp.c | 4 +++-
> drivers/infiniband/sw/siw/siw_verbs.c | 5 +++--
> 2 files changed, 6 insertions(+), 3 deletions(-)
>
>diff --git a/drivers/infiniband/sw/siw/siw_qp.c
>b/drivers/infiniband/sw/siw/siw_qp.c
>index 11383d9f95ef..a2c08f17f13d 100644
>--- a/drivers/infiniband/sw/siw/siw_qp.c
>+++ b/drivers/infiniband/sw/siw/siw_qp.c
>@@ -1016,13 +1016,15 @@ static bool siw_cq_notify_now(struct siw_cq
>*cq, u32 flags)
> if (!cq->base_cq.comp_handler)
> return false;
>
>+ smp_rmb();
> cq_notify = READ_ONCE(*cq->notify);
>
> if ((cq_notify & SIW_NOTIFY_NEXT_COMPLETION) ||
> ((cq_notify & SIW_NOTIFY_SOLICITED) &&
> (flags & SIW_WQE_SOLICITED))) {
> /* dis-arm CQ */
>- smp_store_mb(*cq->notify, SIW_NOTIFY_NOT);
>+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_NOT);
>+ smp_wmb();
>
> return true;
> }
>diff --git a/drivers/infiniband/sw/siw/siw_verbs.c
>b/drivers/infiniband/sw/siw/siw_verbs.c
>index 32dc79d0e898..41c5ab293fe1 100644
>--- a/drivers/infiniband/sw/siw/siw_verbs.c
>+++ b/drivers/infiniband/sw/siw/siw_verbs.c
>@@ -1142,10 +1142,11 @@ int siw_req_notify_cq(struct ib_cq *base_cq,
>enum ib_cq_notify_flags flags)
>
> if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
> /* CQ event for next solicited completion */
>- smp_store_mb(*cq->notify, SIW_NOTIFY_SOLICITED);
>+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_SOLICITED);
> else
> /* CQ event for any signalled completion */
>- smp_store_mb(*cq->notify, SIW_NOTIFY_ALL);
>+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_ALL);
>+ smp_wmb();
>
> if (flags & IB_CQ_REPORT_MISSED_EVENTS)
> return cq->cq_put - cq->cq_get;
>--
>2.20.0
>
>
Hi Arnd,
Many thanks for pointing that out! Indeed, this CQ notification
mechanism does not take 32 bit architectures into account.
Since we have only three flags to hold here, it's probably better
to make it a 32bit value. That would remove the issue w/o
introducing extra smp_wmb(). I'd prefer smp_store_mb(),
since on some architectures it shall be more efficient.
That would also make it sufficient to use READ_ONCE.
That would be the proposed fix:
From c7c3e2dbc3555581be52cb5d76c15726dced0331 Mon Sep 17 00:00:00 2001
From: Bernard Metzler <bmt@zurich.ibm.com>
Date: Fri, 12 Jul 2019 13:19:27 +0200
Subject: [PATCH] Make shared CQ notification flags 32bit to respect 32bit
architectures
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
---
drivers/infiniband/sw/siw/siw.h | 2 +-
drivers/infiniband/sw/siw/siw_qp.c | 6 +++---
drivers/infiniband/sw/siw/siw_verbs.c | 6 +++---
include/uapi/rdma/siw-abi.h | 3 ++-
4 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/infiniband/sw/siw/siw.h b/drivers/infiniband/sw/siw/siw.h
index 409e2987cd45..d59d81f4d86b 100644
--- a/drivers/infiniband/sw/siw/siw.h
+++ b/drivers/infiniband/sw/siw/siw.h
@@ -216,7 +216,7 @@ struct siw_wqe {
struct siw_cq {
struct ib_cq base_cq;
spinlock_t lock;
- u64 *notify;
+ struct siw_cq_ctrl *notify;
struct siw_cqe *queue;
u32 cq_put;
u32 cq_get;
diff --git a/drivers/infiniband/sw/siw/siw_qp.c b/drivers/infiniband/sw/siw/siw_qp.c
index 83e50fe8e48b..0fcc5002d2da 100644
--- a/drivers/infiniband/sw/siw/siw_qp.c
+++ b/drivers/infiniband/sw/siw/siw_qp.c
@@ -1011,18 +1011,18 @@ int siw_activate_tx(struct siw_qp *qp)
*/
static bool siw_cq_notify_now(struct siw_cq *cq, u32 flags)
{
- u64 cq_notify;
+ u32 cq_notify;
if (!cq->base_cq.comp_handler)
return false;
- cq_notify = READ_ONCE(*cq->notify);
+ cq_notify = READ_ONCE(cq->notify->flags);
if ((cq_notify & SIW_NOTIFY_NEXT_COMPLETION) ||
((cq_notify & SIW_NOTIFY_SOLICITED) &&
(flags & SIW_WQE_SOLICITED))) {
/* dis-arm CQ */
- smp_store_mb(*cq->notify, SIW_NOTIFY_NOT);
+ smp_store_mb(cq->notify->flags, SIW_NOTIFY_NOT);
return true;
}
diff --git a/drivers/infiniband/sw/siw/siw_verbs.c b/drivers/infiniband/sw/siw/siw_verbs.c
index d4fb78780765..bc6892229af0 100644
--- a/drivers/infiniband/sw/siw/siw_verbs.c
+++ b/drivers/infiniband/sw/siw/siw_verbs.c
@@ -1049,7 +1049,7 @@ int siw_create_cq(struct ib_cq *base_cq, const struct ib_cq_init_attr *attr,
spin_lock_init(&cq->lock);
- cq->notify = &((struct siw_cq_ctrl *)&cq->queue[size])->notify;
+ cq->notify = (struct siw_cq_ctrl *)&cq->queue[size];
if (udata) {
struct siw_uresp_create_cq uresp = {};
@@ -1142,10 +1142,10 @@ int siw_req_notify_cq(struct ib_cq *base_cq, enum ib_cq_notify_flags flags)
if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
/* CQ event for next solicited completion */
- smp_store_mb(*cq->notify, SIW_NOTIFY_SOLICITED);
+ smp_store_mb(cq->notify->flags, SIW_NOTIFY_SOLICITED);
else
/* CQ event for any signalled completion */
- smp_store_mb(*cq->notify, SIW_NOTIFY_ALL);
+ smp_store_mb(cq->notify->flags, SIW_NOTIFY_ALL);
if (flags & IB_CQ_REPORT_MISSED_EVENTS)
return cq->cq_put - cq->cq_get;
diff --git a/include/uapi/rdma/siw-abi.h b/include/uapi/rdma/siw-abi.h
index ba4d5315cb76..93298980d3a7 100644
--- a/include/uapi/rdma/siw-abi.h
+++ b/include/uapi/rdma/siw-abi.h
@@ -178,6 +178,7 @@ struct siw_cqe {
* to control CQ arming.
*/
struct siw_cq_ctrl {
- __aligned_u64 notify;
+ __u32 flags;
+ __u32 pad;
};
#endif
--
2.17.2
^ permalink raw reply related
* Re: [PATCH v4 00/25] InfiniBand Transport (IBTRS) and Network Block Device (IBNBD)
From: Danil Kipnis @ 2019-07-12 10:58 UTC (permalink / raw)
To: Sagi Grimberg
Cc: Jack Wang, linux-block, linux-rdma, axboe, Christoph Hellwig,
bvanassche, jgg, dledford, Roman Pen, gregkh
In-Reply-To: <aef765ed-4bb9-2211-05d0-b320cc3ac275@grimberg.me>
On Fri, Jul 12, 2019 at 2:22 AM Sagi Grimberg <sagi@grimberg.me> wrote:
>
>
> >> My main issues which were raised before are:
> >> - IMO there isn't any justification to this ibtrs layering separation
> >> given that the only user of this is your ibnbd. Unless you are
> >> trying to submit another consumer, you should avoid adding another
> >> subsystem that is not really general purpose.
> > We designed ibtrs not only with the IBNBD in mind but also as the
> > transport layer for a distributed SDS. We'd like to be able to do what
> > ceph is capable of (automatic up/down scaling of the storage cluster,
> > automatic recovery) but using in-kernel rdma-based IO transport
> > drivers, thin-provisioned volume managers, etc. to keep the highest
> > possible performance.
>
> Sounds lovely, but still very much bound to your ibnbd. And that part
> is not included in the patch set, so I still don't see why should this
> be considered as a "generic" transport subsystem (it clearly isn't).
Having IBTRS sit on a storage enables that storage to communicate with
other storages (forward requests, request read from other storages
i.e. for sync traffic). IBTRS is generic in the sense that it removes
the strict separation into initiator (converting BIOs into some
hardware specific protocol messages) and target (which forwards those
messages to some local device supporting that protocol).
It appears less generic to me to talk SCSI or NVME between storages if
some storages have SCSI, other NVME disks or LVM volumes, or mixed
setup. IBTRS allows to just send or request read of an sg-list between
machines over rdma - the very minimum required to transport a BIO.
It would in-deed support our case with the library if we would propose
at least two users of it. We now only have a very early stage
prototype capable of organizing storages in pools, multiplexing io
between different storages, etc. sitting on top of ibtrs, it's not
functional yet. On the other hand ibnbd with ibtrs alone already make
over 10000 lines.
> > All in all itbrs is a library to establish a "fat", multipath,
> > autoreconnectable connection between two hosts on top of rdma,
> > optimized for transport of IO traffic.
>
> That is also dictating a wire-protocol which makes it useless to pretty
> much any other consumer. Personally, I don't see how this library
> would ever be used outside of your ibnbd.
Its true, IBTRS also imposes a protocol for connection establishment
and IO path. I think at least the IO part we did reduce to a bare
minimum:
350 * Write *
351
352 1. When processing a write request client selects one of the memory chunks
353 on the server side and rdma writes there the user data, user header and the
354 IBTRS_MSG_RDMA_WRITE message. Apart from the type (write), the message only
355 contains size of the user header. The client tells the server
which chunk has
356 been accessed and at what offset the IBTRS_MSG_RDMA_WRITE can be found by
357 using the IMM field.
358
359 2. When confirming a write request server sends an "empty" rdma message with
360 an immediate field. The 32 bit field is used to specify the outstanding
361 inflight IO and for the error code.
362
363 CLT SRV
364 usr_data + usr_hdr + ibtrs_msg_rdma_write ----------------->
[IBTRS_IO_REQ_IMM]
365 [IBTRS_IO_RSP_IMM] <----------------- (id + errno)
366
367 * Read *
368
369 1. When processing a read request client selects one of the memory chunks
370 on the server side and rdma writes there the user header and the
371 IBTRS_MSG_RDMA_READ message. This message contains the type (read), size of
372 the user header, flags (specifying if memory invalidation is
necessary) and the
373 list of addresses along with keys for the data to be read into.
374
375 2. When confirming a read request server transfers the requested data first,
376 attaches an invalidation message if requested and finally an "empty" rdma
377 message with an immediate field. The 32 bit field is used to specify the
378 outstanding inflight IO and the error code.
379
380 CLT SRV
381 usr_hdr + ibtrs_msg_rdma_read --------------> [IBTRS_IO_REQ_IMM]
382 [IBTRS_IO_RSP_IMM] <-------------- usr_data + (id + errno)
383 or in case client requested invalidation:
384 [IBTRS_IO_RSP_IMM_W_INV] <-------------- usr_data + (INV) +
(id + errno)
> >> - ibtrs in general is using almost no infrastructure from the existing
> >> kernel subsystems. Examples are:
> >> - tag allocation mechanism (which I'm not clear why its needed)
> > As you correctly noticed our client manages the buffers allocated and
> > registered by the server on the connection establishment. Our tags are
> > just a mechanism to take and release those buffers for incoming
> > requests on client side. Since the buffers allocated by the server are
> > to be shared between all the devices mapped from that server and all
> > their HW queues (each having num_cpus of them) the mechanism behind
> > get_tag/put_tag also takes care of the fairness.
>
> We have infrastructure for this, sbitmaps.
AFAIR Roman did try to use sbitmap but found no benefits in terms of
readability or number of lines:
" What is left unchanged on IBTRS side but was suggested to modify:
- Bart suggested to use sbitmap instead of calling find_first_zero_bit()
and friends. I found calling pure bit API is more explicit in
comparison to sbitmap - there is no need in using sbitmap_queue
and all the power of wait queues, no benefits in terms of LoC
as well." https://lwn.net/Articles/756994/
If sbitmap is a must for our use case from the infrastructure point of
view, we will reiterate on it.
>
> >> - rdma rw abstraction similar to what we have in the core
> > On the one hand we have only single IO related function:
> > ibtrs_clt_request(READ/WRITE, session,...), which executes rdma write
> > with imm, or requests an rdma write with imm to be executed by the
> > server.
>
> For sure you can enhance the rw API to have imm support?
I'm not familiar with the architectural intention behind rw.c.
Extending the API with the support of imm field is (I guess) doable.
> > On the other hand we provide an abstraction to establish and
> > manage what we call "session", which consist of multiple paths (to do
> > failover and multipath with different policies), where each path
> > consists of num_cpu rdma connections.
>
> That's fine, but it doesn't mean that it also needs to re-write
> infrastructure that we already have.
Do you refer to rw.c?
> > Once you established a session
> > you can add or remove paths from it on the fly. In case the connection
> > to server is lost, the client does periodic attempts to reconnect
> > automatically. On the server side you get just sg-lists with a
> > direction READ or WRITE as requested by the client. We designed this
> > interface not only as the minimum required to build a block device on
> > top of rdma but also with a distributed raid in mind.
>
> I suggest you take a look at the rw API and use that in your transport.
We will look into rw.c. Do you suggest we move the multipath and the
multiple QPs per path and connection establishment on *top* of it or
*into* it?
> >> Another question, from what I understand from the code, the client
> >> always rdma_writes data on writes (with imm) from a remote pool of
> >> server buffers dedicated to it. Essentially all writes are immediate (no
> >> rdma reads ever). How is that different than using send wrs to a set of
> >> pre-posted recv buffers (like all others are doing)? Is it faster?
> > At the very beginning of the project we did some measurements and saw,
> > that it is faster. I'm not sure if this is still true
>
> Its not significantly faster (can't imagine why it would be).
> What could make a difference is probably the fact that you never
> do rdma reads for I/O writes which might be better. Also perhaps the
> fact that you normally don't wait for send completions before completing
> I/O (which is broken), and the fact that you batch recv operations.
>
> I would be interested to understand what indeed makes ibnbd run faster
> though.
Yes, we would like to understand this too. I will try increasing the
inline_data_size on nvme in our benchmarks as the next step to check
if this influences the results.
> >> Also, given that the server pre-allocate a substantial amount of memory
> >> for each connection, is it documented the requirements from the server
> >> side? Usually kernel implementations (especially upstream ones) will
> >> avoid imposing such large longstanding memory requirements on the system
> >> by default. I don't have a firm stand on this, but wanted to highlight
> >> this as you are sending this for upstream inclusion.
> > We definitely need to stress that somewhere. Will include into readme
> > and add to the cover letter next time. Our memory management is indeed
> > basically absent in favor of performance: The server reserves
> > queue_depth of say 512K buffers. Each buffer is used by client for
> > single IO only, no matter how big the request is. So if client only
> > issues 4K IOs, we do waste 508*queue_depth K of memory. We were aiming
> > for lowest possible latency from the beginning. It is probably
> > possible to implement some clever allocator on the server side which
> > wouldn't affect the performance a lot.
>
> Or you can fallback to rdma_read like the rest of the ulps.
We currently have a single round trip for every write IO: write + ack.
Wouldn't switching to rdma_read make 2 round trips out of it: command
+ rdma_read + ack?
^ permalink raw reply
* RE: regression: nvme rdma with bnxt_re0 broken
From: Parav Pandit @ 2019-07-12 9:49 UTC (permalink / raw)
To: Selvin Xavier
Cc: Yi Zhang, linux-nvme@lists.infradead.org, Daniel Jurgens,
linux-rdma@vger.kernel.org, Devesh Sharma
In-Reply-To: <AM0PR05MB4866CCD487C9D99BD9526BA8D1F20@AM0PR05MB4866.eurprd05.prod.outlook.com>
> > Hi Selvin,
> >
> > > -----Original Message-----
> > > From: Selvin Xavier <selvin.xavier@broadcom.com>
> > > Sent: Friday, July 12, 2019 9:16 AM
> > > To: Parav Pandit <parav@mellanox.com>
> > > Cc: Yi Zhang <yi.zhang@redhat.com>; linux-nvme@lists.infradead.org;
> > > Daniel Jurgens <danielj@mellanox.com>; linux-rdma@vger.kernel.org;
> > > Devesh Sharma <devesh.sharma@broadcom.com>
> > > Subject: Re: regression: nvme rdma with bnxt_re0 broken
> > >
> > > On Fri, Jul 12, 2019 at 8:19 AM Parav Pandit <parav@mellanox.com>
> wrote:
> > > >
> > > > GID table looks fine.
> > > >
> > > The GID table has fe80:0000:0000:0000:020a:f7ff:fee3:6e32 entry
> > > repeated 6 times. 2 for each interface bnxt_roce, bnxt_roce.43 and
> > > bnxt_roce.45. Is this expected to have same gid entries for vlan and
> > > base interfaces? As you mentioned earlier, driver's assumption that
> > > only 2 GID entries identical (one for RoCE v1 and one for RoCE
> > > v2) is breaking here.
> > >
> > Yes, this is correct behavior. Each vlan netdev interface is in
> > different L2 segment.
> > Vlan netdev has this ipv6 link local address. Hence, it is added to the GID
> table.
> > A given GID table entry is identified uniquely by GID+ndev+type(v1/v2).
> >
> > Reviewing bnxt_qplib_add_sgid() does the comparison below.
> > if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid))) {
> >
> > This comparison looks incomplete which ignore netdev and type.
> > But even with that, I would expect GID entry addition failure for
> > vlans for ipv6 link local entries.
> >
> > But I am puzzled now, that , with above memcmp() check, how does both
> > v1 and v2 entries get added in your table and for vlans too?
> > I expect add_gid() and core/cache.c add_roce_gid () to fail for the
> > duplicate entry.
> > But GID table that Yi Zhang dumped has these vlan entries.
> > I am missing something.
> >
> Ah, found it.
> bnxt_re_add_gid() checks for -EALREADY and returns 0 to add_gid() callback.
> Ok. so you just need to extend bnxt_qplib_add_sgid() for considering vlan too.
> Let me see if I can share a patch in few minutes.
>
> > Yi Zhang,
> > Instead of last 15 lines of dmesg, can you please share the whole dmsg
> > log which should be enabled before creating vlans.
> > using
> > echo -n "module ib_core +p" /sys/kernel/debug/dynamic_debug/control
> >
> > Selvin,
> > Additionally, driver shouldn't be looking at the duplicate entries.
> > core already does it.
> > You might only want to do for v1/v2 case as bnxt driver has some
> > dependency with it.
> > Can you please fix this part?
> >
How about below fix?
From f3f17008d34b5a0c38c190010281a3030a8e5771 Mon Sep 17 00:00:00 2001
From: Parav Pandit <parav@mellanox.com>
Date: Fri, 12 Jul 2019 04:34:52 -0500
Subject: [PATCH] IB/bnxt_re: Honor vlan_id in GID entry comparision
GID entry consist of GID, vlan, netdev and smac.
Extend GID duplicate check comparions to consider vlan_id as well
to support IPv6 VLAN based link local addresses.
Fixes: 823b23da7113 ("IB/core: Allow vlan link local address based RoCE GIDs")
Change-Id: I2e026ec8065c8425ba24fad8525323d112a2f4e4
Signed-off-by: Parav Pandit <parav@mellanox.com>
---
drivers/infiniband/hw/bnxt_re/qplib_sp.c | 4 +++-
drivers/infiniband/hw/bnxt_re/qplib_sp.h | 1 +
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
index 48793d3512ac..8567b7367669 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
@@ -296,7 +296,8 @@ int bnxt_qplib_add_sgid(struct bnxt_qplib_sgid_tbl *sgid_tbl,
}
free_idx = sgid_tbl->max;
for (i = 0; i < sgid_tbl->max; i++) {
- if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid))) {
+ if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid)) &&
+ sgid_tbl->tbl[i].vlan_id == vlan_id) {
dev_dbg(&res->pdev->dev,
"SGID entry already exist in entry %d!\n", i);
*index = i;
@@ -351,6 +352,7 @@ int bnxt_qplib_add_sgid(struct bnxt_qplib_sgid_tbl *sgid_tbl,
}
/* Add GID to the sgid_tbl */
memcpy(&sgid_tbl->tbl[free_idx], gid, sizeof(*gid));
+ sgid_tbl->tbl[free_idx].vlan_id = vlan_id;
sgid_tbl->active++;
if (vlan_id != 0xFFFF)
sgid_tbl->vlan[free_idx] = 1;
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.h b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
index 0ec3b12b0bcd..7a1957c9dc6f 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
@@ -82,6 +82,7 @@ struct bnxt_qplib_pd {
struct bnxt_qplib_gid {
u8 data[16];
+ u16 vlan_id;
};
struct bnxt_qplib_ah {
--
2.19.2
^ permalink raw reply related
* RE: regression: nvme rdma with bnxt_re0 broken
From: Parav Pandit @ 2019-07-12 9:39 UTC (permalink / raw)
To: Parav Pandit, Selvin Xavier
Cc: Yi Zhang, linux-nvme@lists.infradead.org, Daniel Jurgens,
linux-rdma@vger.kernel.org, Devesh Sharma
In-Reply-To: <AM0PR05MB4866CFEDCDF3CDA1D7D18AA5D1F20@AM0PR05MB4866.eurprd05.prod.outlook.com>
> -----Original Message-----
> From: linux-rdma-owner@vger.kernel.org <linux-rdma-
> owner@vger.kernel.org> On Behalf Of Parav Pandit
> Sent: Friday, July 12, 2019 2:58 PM
> To: Selvin Xavier <selvin.xavier@broadcom.com>
> Cc: Yi Zhang <yi.zhang@redhat.com>; linux-nvme@lists.infradead.org; Daniel
> Jurgens <danielj@mellanox.com>; linux-rdma@vger.kernel.org; Devesh
> Sharma <devesh.sharma@broadcom.com>
> Subject: RE: regression: nvme rdma with bnxt_re0 broken
>
> Hi Selvin,
>
> > -----Original Message-----
> > From: Selvin Xavier <selvin.xavier@broadcom.com>
> > Sent: Friday, July 12, 2019 9:16 AM
> > To: Parav Pandit <parav@mellanox.com>
> > Cc: Yi Zhang <yi.zhang@redhat.com>; linux-nvme@lists.infradead.org;
> > Daniel Jurgens <danielj@mellanox.com>; linux-rdma@vger.kernel.org;
> > Devesh Sharma <devesh.sharma@broadcom.com>
> > Subject: Re: regression: nvme rdma with bnxt_re0 broken
> >
> > On Fri, Jul 12, 2019 at 8:19 AM Parav Pandit <parav@mellanox.com> wrote:
> > >
> > > Hi Yi Zhang,
> > >
> > > > -----Original Message-----
> > > > From: linux-rdma-owner@vger.kernel.org <linux-rdma-
> > > > owner@vger.kernel.org> On Behalf Of Yi Zhang
> > > > Sent: Friday, July 12, 2019 7:23 AM
> > > > To: Parav Pandit <parav@mellanox.com>;
> > > > linux-nvme@lists.infradead.org
> > > > Cc: Daniel Jurgens <danielj@mellanox.com>;
> > > > linux-rdma@vger.kernel.org; Devesh Sharma
> > > > <devesh.sharma@broadcom.com>; selvin.xavier@broadcom.com
> > > > Subject: Re: regression: nvme rdma with bnxt_re0 broken
> > > >
> > > > Hi Parav
> > > >
> > > > Here is the info, let me know if it's enough, thanks.
> > > >
> > > > [root@rdma-perf-07 ~]$ echo -n "module ib_core +p" >
> > > > /sys/kernel/debug/dynamic_debug/control
> > > > [root@rdma-perf-07 ~]$ ifdown bnxt_roce Device 'bnxt_roce'
> > > > successfully disconnected.
> > > > [root@rdma-perf-07 ~]$ ifup bnxt_roce Connection successfully
> > > > activated (D-Bus active path:
> > > > /org/freedesktop/NetworkManager/ActiveConnection/16)
> > > > [root@rdma-perf-07 ~]$ sh a.sh
> > > > DEV PORT INDEX GID IPv4 VER DEV
> > > > --- ---- ----- --- ------------ --- ---
> > > > bnxt_re0 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > > v1 bnxt_roce
> > > > bnxt_re0 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > > v2 bnxt_roce
> > > > bnxt_re0 1 10 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
> > > > 172.31.43.187 v1 bnxt_roce.43
> > > > bnxt_re0 1 11 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
> > > > 172.31.43.187 v2 bnxt_roce.43
> > > > bnxt_re0 1 2 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > > v1 bnxt_roce.45
> > > > bnxt_re0 1 3 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > > v2 bnxt_roce.45
> > > > bnxt_re0 1 4 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > > v1 bnxt_roce.43
> > > > bnxt_re0 1 5 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > > v2 bnxt_roce.43
> > > > bnxt_re0 1 6 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > > 172.31.40.187 v1 bnxt_roce
> > > > bnxt_re0 1 7 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > > 172.31.40.187 v2 bnxt_roce
> > > > bnxt_re0 1 8 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
> > > > 172.31.45.187 v1 bnxt_roce.45
> > > > bnxt_re0 1 9 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
> > > > 172.31.45.187 v2 bnxt_roce.45
> > > > bnxt_re1 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
> > > > v1 lom_2
> > > > bnxt_re1 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
> > > > v2 lom_2
> > > > cxgb4_0 1 0 0007:433b:f5b0:0000:0000:0000:0000:0000 v1
> > > > cxgb4_0 2 0 0007:433b:f5b8:0000:0000:0000:0000:0000 v1
> > > > hfi1_0 1 0 fe80:0000:0000:0000:0011:7501:0109:6c60 v1
> > > > hfi1_0 1 1 fe80:0000:0000:0000:0006:6a00:0000:0005 v1
> > > > mlx5_0 1 0 fe80:0000:0000:0000:506b:4b03:00f3:8a38 v1
> > > > n_gids_found=19
> > > >
> > > > [root@rdma-perf-07 ~]$ dmesg | tail -15
> > > > [ 19.744421] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8002: link
> > > > becomes ready [ 19.758371] IPv6: ADDRCONF(NETDEV_CHANGE):
> > > > mlx5_ib0.8004: link becomes ready [ 20.010469] hfi1 0000:d8:00.0:
> hfi1_0:
> > > > Switching to NO_DMA_RTAIL [ 20.440580] IPv6:
> > > > ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8006: link becomes ready
> > > > [ 21.098510] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
> > > > requested: 8. Max supported is 2.
> > > > [ 21.324341] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
> > > > requested: 8. Max supported is 2.
> > > > [ 22.058647] IPv6: ADDRCONF(NETDEV_CHANGE): hfi1_opa0: link
> > becomes
> > > > ready [ 211.407329] _ib_cache_gid_del: can't delete gid
> > > > fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22 [ 211.407334]
> > > > _ib_cache_gid_del: can't delete gid
> > > > fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22 [ 211.425275]
> > > > infiniband
> > > > bnxt_re0: del_gid port=1 index=6 gid
> > > > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > > [ 211.425280] infiniband bnxt_re0: free_gid_entry_locked port=1
> > > > index=6 gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > > [ 211.425292] infiniband bnxt_re0: del_gid port=1 index=7 gid
> > > > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > > [ 211.425461] infiniband bnxt_re0: free_gid_entry_locked port=1
> > > > index=7 gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > > [ 225.474061] infiniband bnxt_re0: store_gid_entry port=1 index=6
> > > > gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > > [ 225.474075] infiniband bnxt_re0: store_gid_entry port=1 index=7
> > > > gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > >
> > > >
> > > GID table looks fine.
> > >
> > The GID table has fe80:0000:0000:0000:020a:f7ff:fee3:6e32 entry
> > repeated 6 times. 2 for each interface bnxt_roce, bnxt_roce.43 and
> > bnxt_roce.45. Is this expected to have same gid entries for vlan and
> > base interfaces? As you mentioned earlier, driver's assumption that
> > only 2 GID entries identical (one for RoCE v1 and one for RoCE
> > v2) is breaking here.
> >
> Yes, this is correct behavior. Each vlan netdev interface is in different L2
> segment.
> Vlan netdev has this ipv6 link local address. Hence, it is added to the GID table.
> A given GID table entry is identified uniquely by GID+ndev+type(v1/v2).
>
> Reviewing bnxt_qplib_add_sgid() does the comparison below.
> if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid))) {
>
> This comparison looks incomplete which ignore netdev and type.
> But even with that, I would expect GID entry addition failure for vlans for ipv6
> link local entries.
>
> But I am puzzled now, that , with above memcmp() check, how does both v1
> and v2 entries get added in your table and for vlans too?
> I expect add_gid() and core/cache.c add_roce_gid () to fail for the duplicate
> entry.
> But GID table that Yi Zhang dumped has these vlan entries.
> I am missing something.
>
Ah, found it.
bnxt_re_add_gid() checks for -EALREADY and returns 0 to add_gid() callback.
Ok. so you just need to extend bnxt_qplib_add_sgid() for considering vlan too.
Let me see if I can share a patch in few minutes.
> Yi Zhang,
> Instead of last 15 lines of dmesg, can you please share the whole dmsg log
> which should be enabled before creating vlans.
> using
> echo -n "module ib_core +p" /sys/kernel/debug/dynamic_debug/control
>
> Selvin,
> Additionally, driver shouldn't be looking at the duplicate entries. core already
> does it.
> You might only want to do for v1/v2 case as bnxt driver has some dependency
> with it.
> Can you please fix this part?
>
> > > > On 7/12/19 12:18 AM, Parav Pandit wrote:
> > > > > Sagi,
> > > > >
> > > > > This is better one to cc to linux-rdma.
> > > > >
> > > > > + Devesh, Selvin.
> > > > >
> > > > >> -----Original Message-----
> > > > >> From: Parav Pandit
> > > > >> Sent: Thursday, July 11, 2019 6:25 PM
> > > > >> To: Yi Zhang <yi.zhang@redhat.com>;
> > > > >> linux-nvme@lists.infradead.org
> > > > >> Cc: Daniel Jurgens <danielj@mellanox.com>
> > > > >> Subject: RE: regression: nvme rdma with bnxt_re0 broken
> > > > >>
> > > > >> Hi Yi Zhang,
> > > > >>
> > > > >>> -----Original Message-----
> > > > >>> From: Yi Zhang <yi.zhang@redhat.com>
> > > > >>> Sent: Thursday, July 11, 2019 3:17 PM
> > > > >>> To: linux-nvme@lists.infradead.org
> > > > >>> Cc: Daniel Jurgens <danielj@mellanox.com>; Parav Pandit
> > > > >>> <parav@mellanox.com>
> > > > >>> Subject: regression: nvme rdma with bnxt_re0 broken
> > > > >>>
> > > > >>> Hello
> > > > >>>
> > > > >>> 'nvme connect' failed when use bnxt_re0 on latest upstream
> > > > >>> build[1], by bisecting I found it was introduced from
> > > > >>> v5.2.0-rc1 with [2], it works after I revert it.
> > > > >>> Let me know if you need more info, thanks.
> > > > >>>
> > > > >>> [1]
> > > > >>> [root@rdma-perf-07 ~]$ nvme connect -t rdma -a 172.31.40.125
> > > > >>> -s
> > > > >>> 4420 -n testnqn Failed to write to /dev/nvme-fabrics: Bad
> > > > >>> address
> > > > >>>
> > > > >>> [root@rdma-perf-07 ~]$ dmesg
> > > > >>> [ 476.320742] bnxt_en 0000:19:00.0: QPLIB: cmdq[0x4b9]=0x15
> > > > >>> status 0x5
> > >
> > > Devesh, Selvin,
> > >
> > > What does this error mean?
> > > bnxt_qplib_create_ah() is failing.
> > >
> > We are passing a wrong index for the GID to FW because of the
> > assumption mentioned earlier.
> > FW is failing command due to this.
> >
> > > > >>> [ 476.327103] infiniband bnxt_re0: Failed to allocate HW AH [
> > > > >>> 476.332525] nvme nvme2: rdma_connect failed (-14).
> > > > >>> [ 476.343552] nvme nvme2: rdma connection establishment
> > > > >>> failed
> > > > >>> (-14)
> > > > >>>
> > > > >>> [root@rdma-perf-07 ~]$ lspci | grep -i Broadcom
> > > > >>> 01:00.0 Ethernet controller: Broadcom Inc. and subsidiaries
> > > > >>> NetXtreme
> > > > >>> BCM5720 2-port Gigabit Ethernet PCIe
> > > > >>> 01:00.1 Ethernet controller: Broadcom Inc. and subsidiaries
> > > > >>> NetXtreme
> > > > >>> BCM5720 2-port Gigabit Ethernet PCIe
> > > > >>> 18:00.0 RAID bus controller: Broadcom / LSI MegaRAID SAS-3
> > > > >>> 3008 [Fury] (rev
> > > > >>> 02)
> > > > >>> 19:00.0 Ethernet controller: Broadcom Inc. and subsidiaries
> > > > >>> BCM57412 NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
> > > > >>> 19:00.1 Ethernet controller: Broadcom Inc. and subsidiaries
> > > > >>> BCM57412 NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
> > > > >>>
> > > > >>>
> > > > >>> [2]
> > > > >>> commit 823b23da71132b80d9f41ab667c68b112455f3b6
> > > > >>> Author: Parav Pandit <parav@mellanox.com>
> > > > >>> Date: Wed Apr 10 11:23:03 2019 +0300
> > > > >>>
> > > > >>> IB/core: Allow vlan link local address based RoCE GIDs
> > > > >>>
> > > > >>> IPv6 link local address for a VLAN netdevice has nothing
> > > > >>> to do with
> > its
> > > > >>> resemblance with the default GID, because VLAN link local GID is
> in
> > > > >>> different layer 2 domain.
> > > > >>>
> > > > >>> Now that RoCE MAD packet processing and route resolution
> > > > >>> consider
> > > > the
> > > > >>> right GID index, there is no need for an unnecessary
> > > > >>> check which
> > > > prevents
> > > > >>> the addition of vlan based IPv6 link local GIDs.
> > > > >>>
> > > > >>> Signed-off-by: Parav Pandit <parav@mellanox.com>
> > > > >>> Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
> > > > >>> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
> > > > >>> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
> > > > >>>
> > > > >>>
> > > > >>>
> > > > >>> Best Regards,
> > > > >>> Yi Zhang
> > > > >>>
> > > > >> I need some more information from you to debug this issue as I
> > > > >> don’t have the hw.
> > > > >> The highlighted patch added support for IPv6 link local address
> > > > >> for vlan. I am unsure how this can affect IPv4 AH creation for
> > > > >> which there is
> > > > failure.
> > > > >>
> > > > >> 1. Before you assign the IP address to the netdevice, Please
> > > > >> do, echo -n "module ib_core +p" >
> > > > >> /sys/kernel/debug/dynamic_debug/control
> > > > >>
> > > > >> Please share below output before doing nvme connect.
> > > > >> 2. Output of script [1]
> > > > >> $ show_gids script
> > > > >> If getting this script is problematic, share the output of,
> > > > >>
> > > > >> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gids/*
> > > > >> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gid_attrs/ndevs/*
> > > > >> $ ip link show
> > > > >> $ip addr show
> > > > >> $ dmesg
> > > > >>
> > > > >> [1]
> > > > >> https://community.mellanox.com/s/article/understanding-show-gid
> > > > >> s- script#jive_content_id_The_Script
> > > > >>
> > > > >> I suspect that driver's assumption about GID indices might have
> > > > >> gone wrong here in drivers/infiniband/hw/bnxt_re/ib_verbs.c.
> > > > >> Lets see about results to confirm that.
> > > > > _______________________________________________
> > > > > Linux-nvme mailing list
> > > > > Linux-nvme@lists.infradead.org
> > > > > http://lists.infradead.org/mailman/listinfo/linux-nvme
^ permalink raw reply
* RE: regression: nvme rdma with bnxt_re0 broken
From: Parav Pandit @ 2019-07-12 9:28 UTC (permalink / raw)
To: Selvin Xavier
Cc: Yi Zhang, linux-nvme@lists.infradead.org, Daniel Jurgens,
linux-rdma@vger.kernel.org, Devesh Sharma
In-Reply-To: <CA+sbYW17PGAW57pyRmQB9KsDA9Q+7FFgSseSTTWE_h6vffa7UQ@mail.gmail.com>
Hi Selvin,
> -----Original Message-----
> From: Selvin Xavier <selvin.xavier@broadcom.com>
> Sent: Friday, July 12, 2019 9:16 AM
> To: Parav Pandit <parav@mellanox.com>
> Cc: Yi Zhang <yi.zhang@redhat.com>; linux-nvme@lists.infradead.org; Daniel
> Jurgens <danielj@mellanox.com>; linux-rdma@vger.kernel.org; Devesh
> Sharma <devesh.sharma@broadcom.com>
> Subject: Re: regression: nvme rdma with bnxt_re0 broken
>
> On Fri, Jul 12, 2019 at 8:19 AM Parav Pandit <parav@mellanox.com> wrote:
> >
> > Hi Yi Zhang,
> >
> > > -----Original Message-----
> > > From: linux-rdma-owner@vger.kernel.org <linux-rdma-
> > > owner@vger.kernel.org> On Behalf Of Yi Zhang
> > > Sent: Friday, July 12, 2019 7:23 AM
> > > To: Parav Pandit <parav@mellanox.com>;
> > > linux-nvme@lists.infradead.org
> > > Cc: Daniel Jurgens <danielj@mellanox.com>;
> > > linux-rdma@vger.kernel.org; Devesh Sharma
> > > <devesh.sharma@broadcom.com>; selvin.xavier@broadcom.com
> > > Subject: Re: regression: nvme rdma with bnxt_re0 broken
> > >
> > > Hi Parav
> > >
> > > Here is the info, let me know if it's enough, thanks.
> > >
> > > [root@rdma-perf-07 ~]$ echo -n "module ib_core +p" >
> > > /sys/kernel/debug/dynamic_debug/control
> > > [root@rdma-perf-07 ~]$ ifdown bnxt_roce Device 'bnxt_roce'
> > > successfully disconnected.
> > > [root@rdma-perf-07 ~]$ ifup bnxt_roce Connection successfully
> > > activated (D-Bus active path:
> > > /org/freedesktop/NetworkManager/ActiveConnection/16)
> > > [root@rdma-perf-07 ~]$ sh a.sh
> > > DEV PORT INDEX GID IPv4 VER DEV
> > > --- ---- ----- --- ------------ --- ---
> > > bnxt_re0 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > v1 bnxt_roce
> > > bnxt_re0 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > v2 bnxt_roce
> > > bnxt_re0 1 10 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
> > > 172.31.43.187 v1 bnxt_roce.43
> > > bnxt_re0 1 11 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
> > > 172.31.43.187 v2 bnxt_roce.43
> > > bnxt_re0 1 2 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > v1 bnxt_roce.45
> > > bnxt_re0 1 3 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > v2 bnxt_roce.45
> > > bnxt_re0 1 4 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > v1 bnxt_roce.43
> > > bnxt_re0 1 5 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > > v2 bnxt_roce.43
> > > bnxt_re0 1 6 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > 172.31.40.187 v1 bnxt_roce
> > > bnxt_re0 1 7 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > 172.31.40.187 v2 bnxt_roce
> > > bnxt_re0 1 8 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
> > > 172.31.45.187 v1 bnxt_roce.45
> > > bnxt_re0 1 9 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
> > > 172.31.45.187 v2 bnxt_roce.45
> > > bnxt_re1 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
> > > v1 lom_2
> > > bnxt_re1 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
> > > v2 lom_2
> > > cxgb4_0 1 0 0007:433b:f5b0:0000:0000:0000:0000:0000 v1
> > > cxgb4_0 2 0 0007:433b:f5b8:0000:0000:0000:0000:0000 v1
> > > hfi1_0 1 0 fe80:0000:0000:0000:0011:7501:0109:6c60 v1
> > > hfi1_0 1 1 fe80:0000:0000:0000:0006:6a00:0000:0005 v1
> > > mlx5_0 1 0 fe80:0000:0000:0000:506b:4b03:00f3:8a38 v1
> > > n_gids_found=19
> > >
> > > [root@rdma-perf-07 ~]$ dmesg | tail -15
> > > [ 19.744421] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8002: link
> > > becomes ready [ 19.758371] IPv6: ADDRCONF(NETDEV_CHANGE):
> > > mlx5_ib0.8004: link becomes ready [ 20.010469] hfi1 0000:d8:00.0: hfi1_0:
> > > Switching to NO_DMA_RTAIL [ 20.440580] IPv6:
> > > ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8006: link becomes ready
> > > [ 21.098510] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
> > > requested: 8. Max supported is 2.
> > > [ 21.324341] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
> > > requested: 8. Max supported is 2.
> > > [ 22.058647] IPv6: ADDRCONF(NETDEV_CHANGE): hfi1_opa0: link
> becomes
> > > ready [ 211.407329] _ib_cache_gid_del: can't delete gid
> > > fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22 [ 211.407334]
> > > _ib_cache_gid_del: can't delete gid
> > > fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22 [ 211.425275]
> > > infiniband
> > > bnxt_re0: del_gid port=1 index=6 gid
> > > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > [ 211.425280] infiniband bnxt_re0: free_gid_entry_locked port=1
> > > index=6 gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > [ 211.425292] infiniband bnxt_re0: del_gid port=1 index=7 gid
> > > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > [ 211.425461] infiniband bnxt_re0: free_gid_entry_locked port=1
> > > index=7 gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > [ 225.474061] infiniband bnxt_re0: store_gid_entry port=1 index=6
> > > gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > > [ 225.474075] infiniband bnxt_re0: store_gid_entry port=1 index=7
> > > gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > >
> > >
> > GID table looks fine.
> >
> The GID table has fe80:0000:0000:0000:020a:f7ff:fee3:6e32 entry repeated 6
> times. 2 for each interface bnxt_roce, bnxt_roce.43 and bnxt_roce.45. Is this
> expected to have same gid entries for vlan and base interfaces? As you
> mentioned earlier, driver's assumption that only 2 GID entries identical (one for
> RoCE v1 and one for RoCE
> v2) is breaking here.
>
Yes, this is correct behavior. Each vlan netdev interface is in different L2 segment.
Vlan netdev has this ipv6 link local address. Hence, it is added to the GID table.
A given GID table entry is identified uniquely by GID+ndev+type(v1/v2).
Reviewing bnxt_qplib_add_sgid() does the comparison below.
if (!memcmp(&sgid_tbl->tbl[i], gid, sizeof(*gid))) {
This comparison looks incomplete which ignore netdev and type.
But even with that, I would expect GID entry addition failure for vlans for ipv6 link local entries.
But I am puzzled now, that , with above memcmp() check, how does both v1 and v2 entries get added in your table and for vlans too?
I expect add_gid() and core/cache.c add_roce_gid () to fail for the duplicate entry.
But GID table that Yi Zhang dumped has these vlan entries.
I am missing something.
Yi Zhang,
Instead of last 15 lines of dmesg, can you please share the whole dmsg log which should be enabled before creating vlans.
using
echo -n "module ib_core +p" /sys/kernel/debug/dynamic_debug/control
Selvin,
Additionally, driver shouldn't be looking at the duplicate entries. core already does it.
You might only want to do for v1/v2 case as bnxt driver has some dependency with it.
Can you please fix this part?
> > > On 7/12/19 12:18 AM, Parav Pandit wrote:
> > > > Sagi,
> > > >
> > > > This is better one to cc to linux-rdma.
> > > >
> > > > + Devesh, Selvin.
> > > >
> > > >> -----Original Message-----
> > > >> From: Parav Pandit
> > > >> Sent: Thursday, July 11, 2019 6:25 PM
> > > >> To: Yi Zhang <yi.zhang@redhat.com>;
> > > >> linux-nvme@lists.infradead.org
> > > >> Cc: Daniel Jurgens <danielj@mellanox.com>
> > > >> Subject: RE: regression: nvme rdma with bnxt_re0 broken
> > > >>
> > > >> Hi Yi Zhang,
> > > >>
> > > >>> -----Original Message-----
> > > >>> From: Yi Zhang <yi.zhang@redhat.com>
> > > >>> Sent: Thursday, July 11, 2019 3:17 PM
> > > >>> To: linux-nvme@lists.infradead.org
> > > >>> Cc: Daniel Jurgens <danielj@mellanox.com>; Parav Pandit
> > > >>> <parav@mellanox.com>
> > > >>> Subject: regression: nvme rdma with bnxt_re0 broken
> > > >>>
> > > >>> Hello
> > > >>>
> > > >>> 'nvme connect' failed when use bnxt_re0 on latest upstream
> > > >>> build[1], by bisecting I found it was introduced from v5.2.0-rc1
> > > >>> with [2], it works after I revert it.
> > > >>> Let me know if you need more info, thanks.
> > > >>>
> > > >>> [1]
> > > >>> [root@rdma-perf-07 ~]$ nvme connect -t rdma -a 172.31.40.125 -s
> > > >>> 4420 -n testnqn Failed to write to /dev/nvme-fabrics: Bad
> > > >>> address
> > > >>>
> > > >>> [root@rdma-perf-07 ~]$ dmesg
> > > >>> [ 476.320742] bnxt_en 0000:19:00.0: QPLIB: cmdq[0x4b9]=0x15
> > > >>> status 0x5
> >
> > Devesh, Selvin,
> >
> > What does this error mean?
> > bnxt_qplib_create_ah() is failing.
> >
> We are passing a wrong index for the GID to FW because of the assumption
> mentioned earlier.
> FW is failing command due to this.
>
> > > >>> [ 476.327103] infiniband bnxt_re0: Failed to allocate HW AH [
> > > >>> 476.332525] nvme nvme2: rdma_connect failed (-14).
> > > >>> [ 476.343552] nvme nvme2: rdma connection establishment failed
> > > >>> (-14)
> > > >>>
> > > >>> [root@rdma-perf-07 ~]$ lspci | grep -i Broadcom
> > > >>> 01:00.0 Ethernet controller: Broadcom Inc. and subsidiaries
> > > >>> NetXtreme
> > > >>> BCM5720 2-port Gigabit Ethernet PCIe
> > > >>> 01:00.1 Ethernet controller: Broadcom Inc. and subsidiaries
> > > >>> NetXtreme
> > > >>> BCM5720 2-port Gigabit Ethernet PCIe
> > > >>> 18:00.0 RAID bus controller: Broadcom / LSI MegaRAID SAS-3 3008
> > > >>> [Fury] (rev
> > > >>> 02)
> > > >>> 19:00.0 Ethernet controller: Broadcom Inc. and subsidiaries
> > > >>> BCM57412 NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
> > > >>> 19:00.1 Ethernet controller: Broadcom Inc. and subsidiaries
> > > >>> BCM57412 NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
> > > >>>
> > > >>>
> > > >>> [2]
> > > >>> commit 823b23da71132b80d9f41ab667c68b112455f3b6
> > > >>> Author: Parav Pandit <parav@mellanox.com>
> > > >>> Date: Wed Apr 10 11:23:03 2019 +0300
> > > >>>
> > > >>> IB/core: Allow vlan link local address based RoCE GIDs
> > > >>>
> > > >>> IPv6 link local address for a VLAN netdevice has nothing to do with
> its
> > > >>> resemblance with the default GID, because VLAN link local GID is in
> > > >>> different layer 2 domain.
> > > >>>
> > > >>> Now that RoCE MAD packet processing and route resolution
> > > >>> consider
> > > the
> > > >>> right GID index, there is no need for an unnecessary check
> > > >>> which
> > > prevents
> > > >>> the addition of vlan based IPv6 link local GIDs.
> > > >>>
> > > >>> Signed-off-by: Parav Pandit <parav@mellanox.com>
> > > >>> Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
> > > >>> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
> > > >>> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
> > > >>>
> > > >>>
> > > >>>
> > > >>> Best Regards,
> > > >>> Yi Zhang
> > > >>>
> > > >> I need some more information from you to debug this issue as I
> > > >> don’t have the hw.
> > > >> The highlighted patch added support for IPv6 link local address
> > > >> for vlan. I am unsure how this can affect IPv4 AH creation for
> > > >> which there is
> > > failure.
> > > >>
> > > >> 1. Before you assign the IP address to the netdevice, Please do,
> > > >> echo -n "module ib_core +p" >
> > > >> /sys/kernel/debug/dynamic_debug/control
> > > >>
> > > >> Please share below output before doing nvme connect.
> > > >> 2. Output of script [1]
> > > >> $ show_gids script
> > > >> If getting this script is problematic, share the output of,
> > > >>
> > > >> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gids/*
> > > >> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gid_attrs/ndevs/*
> > > >> $ ip link show
> > > >> $ip addr show
> > > >> $ dmesg
> > > >>
> > > >> [1]
> > > >> https://community.mellanox.com/s/article/understanding-show-gids-
> > > >> script#jive_content_id_The_Script
> > > >>
> > > >> I suspect that driver's assumption about GID indices might have
> > > >> gone wrong here in drivers/infiniband/hw/bnxt_re/ib_verbs.c.
> > > >> Lets see about results to confirm that.
> > > > _______________________________________________
> > > > Linux-nvme mailing list
> > > > Linux-nvme@lists.infradead.org
> > > > http://lists.infradead.org/mailman/listinfo/linux-nvme
^ permalink raw reply
* [PATCH] [net-next, netfilter] mlx5: avoid unused variable warning
From: Arnd Bergmann @ 2019-07-12 8:57 UTC (permalink / raw)
To: Saeed Mahameed, Leon Romanovsky, David S. Miller
Cc: Arnd Bergmann, Pablo Neira Ayuso, Jakub Kicinski, Tariq Toukan,
Or Gerlitz, Maxim Mikityanskiy, Eran Ben Elisha, Aya Levin,
netdev, linux-rdma, linux-kernel
Without CONFIG_MLX5_ESWITCH we get a harmless warning:
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:3467:21: error: unused variable 'priv' [-Werror,-Wunused-variable]
struct mlx5e_priv *priv = netdev_priv(dev);
Hide the declaration in the same #ifdef as its usage.
Fixes: 4e95bc268b91 ("net: flow_offload: add flow_block_cb_setup_simple()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 6d0ae87c8ded..b562ba904ea1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -3464,7 +3464,9 @@ static LIST_HEAD(mlx5e_block_cb_list);
static int mlx5e_setup_tc(struct net_device *dev, enum tc_setup_type type,
void *type_data)
{
+#ifdef CONFIG_MLX5_ESWITCH
struct mlx5e_priv *priv = netdev_priv(dev);
+#endif
switch (type) {
#ifdef CONFIG_MLX5_ESWITCH
--
2.20.0
^ permalink raw reply related
* [PATCH] rdma/siw: fix enum type mismatch warnings
From: Arnd Bergmann @ 2019-07-12 8:53 UTC (permalink / raw)
To: Bernard Metzler, Doug Ledford, Jason Gunthorpe
Cc: Arnd Bergmann, Jason Gunthorpe, linux-rdma, linux-kernel
The values in map_cqe_status[] don't match the type:
drivers/infiniband/sw/siw/siw_cq.c:31:4: error: implicit conversion from enumeration type 'enum siw_wc_status' to different enumeration type 'enum siw_opcode' [-Werror,-Wenum-conversion]
{ SIW_WC_SUCCESS, IB_WC_SUCCESS },
~ ^~~~~~~~~~~~~~
drivers/infiniband/sw/siw/siw_cq.c:32:4: error: implicit conversion from enumeration type 'enum siw_wc_status' to different enumeration type 'enum siw_opcode' [-Werror,-Wenum-conversion]
{ SIW_WC_LOC_LEN_ERR, IB_WC_LOC_LEN_ERR },
~ ^~~~~~~~~~~~~~~~~~
Change the struct definition to make them match and stop the
warning.
Fixes: b0fff7317bb4 ("rdma/siw: completion queue methods")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/infiniband/sw/siw/siw_cq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/sw/siw/siw_cq.c b/drivers/infiniband/sw/siw/siw_cq.c
index e2a0ee40d5b5..e381ae9b7d62 100644
--- a/drivers/infiniband/sw/siw/siw_cq.c
+++ b/drivers/infiniband/sw/siw/siw_cq.c
@@ -25,7 +25,7 @@ static int map_wc_opcode[SIW_NUM_OPCODES] = {
};
static struct {
- enum siw_opcode siw;
+ enum siw_wc_status siw;
enum ib_wc_status ib;
} map_cqe_status[SIW_NUM_WC_STATUS] = {
{ SIW_WC_SUCCESS, IB_WC_SUCCESS },
--
2.20.0
^ permalink raw reply related
* [PATCH] rdma/siw: select CONFIG_DMA_VIRT_OPS
From: Arnd Bergmann @ 2019-07-12 8:52 UTC (permalink / raw)
To: Bernard Metzler, Doug Ledford, Jason Gunthorpe
Cc: Arnd Bergmann, Jason Gunthorpe, linux-rdma, linux-kernel
Without this symbol we get a link failure:
ERROR: "dma_virt_ops" [drivers/infiniband/sw/siw/siw.ko] undefined!
Fixes: bdcf26bf9b3a ("rdma/siw: network and RDMA core interface")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/infiniband/sw/siw/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/infiniband/sw/siw/Kconfig b/drivers/infiniband/sw/siw/Kconfig
index 94f684174ce3..ea282789f466 100644
--- a/drivers/infiniband/sw/siw/Kconfig
+++ b/drivers/infiniband/sw/siw/Kconfig
@@ -1,6 +1,7 @@
config RDMA_SIW
tristate "Software RDMA over TCP/IP (iWARP) driver"
depends on INET && INFINIBAND && CRYPTO_CRC32
+ select DMA_VIRT_OPS
help
This driver implements the iWARP RDMA transport over
the Linux TCP/IP network stack. It enables a system with a
--
2.20.0
^ permalink raw reply related
* [PATCH] rdma/siw: avoid smp_store_mb() on a u64
From: Arnd Bergmann @ 2019-07-12 8:51 UTC (permalink / raw)
To: Bernard Metzler, Doug Ledford, Jason Gunthorpe
Cc: Arnd Bergmann, Peter Zijlstra, Jason Gunthorpe, linux-rdma,
linux-kernel
The new siw driver fails to build on i386 with
drivers/infiniband/sw/siw/siw_qp.c:1025:3: error: invalid output size for constraint '+q'
smp_store_mb(*cq->notify, SIW_NOTIFY_NOT);
^
include/asm-generic/barrier.h:141:35: note: expanded from macro 'smp_store_mb'
#define smp_store_mb(var, value) __smp_store_mb(var, value)
^
arch/x86/include/asm/barrier.h:65:47: note: expanded from macro '__smp_store_mb'
#define __smp_store_mb(var, value) do { (void)xchg(&var, value); } while (0)
^
include/asm-generic/atomic-instrumented.h:1648:2: note: expanded from macro 'xchg'
arch_xchg(__ai_ptr, __VA_ARGS__); \
^
arch/x86/include/asm/cmpxchg.h:78:27: note: expanded from macro 'arch_xchg'
#define arch_xchg(ptr, v) __xchg_op((ptr), (v), xchg, "")
^
arch/x86/include/asm/cmpxchg.h:48:19: note: expanded from macro '__xchg_op'
: "+q" (__ret), "+m" (*(ptr)) \
^
drivers/infiniband/sw/siw/siw_qp.o: In function `siw_sqe_complete':
siw_qp.c:(.text+0x1450): undefined reference to `__xchg_wrong_size'
drivers/infiniband/sw/siw/siw_qp.o: In function `siw_rqe_complete':
siw_qp.c:(.text+0x15b0): undefined reference to `__xchg_wrong_size'
drivers/infiniband/sw/siw/siw_verbs.o: In function `siw_req_notify_cq':
siw_verbs.c:(.text+0x18ff): undefined reference to `__xchg_wrong_size'
Since smp_store_mb() has to be an atomic store, but the architecture
can only do this on 32-bit quantities or smaller, but 'cq->notify'
is a 64-bit word.
Apparently the smp_store_mb() is paired with a READ_ONCE() here, which
seems like an odd choice because there is only a barrier on the writer
side and not the reader, and READ_ONCE() is already not atomic on
quantities larger than a CPU register.
I suspect it is sufficient to use the (possibly nonatomic) WRITE_ONCE()
and an SMP memory barrier here. If it does need to be atomic as well
as 64-bit quantities, using an atomic64_set_release()/atomic64_read_acquire()
may be a better choice.
Fixes: 303ae1cdfdf7 ("rdma/siw: application interface")
Fixes: f29dd55b0236 ("rdma/siw: queue pair methods")
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/infiniband/sw/siw/siw_qp.c | 4 +++-
drivers/infiniband/sw/siw/siw_verbs.c | 5 +++--
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/infiniband/sw/siw/siw_qp.c b/drivers/infiniband/sw/siw/siw_qp.c
index 11383d9f95ef..a2c08f17f13d 100644
--- a/drivers/infiniband/sw/siw/siw_qp.c
+++ b/drivers/infiniband/sw/siw/siw_qp.c
@@ -1016,13 +1016,15 @@ static bool siw_cq_notify_now(struct siw_cq *cq, u32 flags)
if (!cq->base_cq.comp_handler)
return false;
+ smp_rmb();
cq_notify = READ_ONCE(*cq->notify);
if ((cq_notify & SIW_NOTIFY_NEXT_COMPLETION) ||
((cq_notify & SIW_NOTIFY_SOLICITED) &&
(flags & SIW_WQE_SOLICITED))) {
/* dis-arm CQ */
- smp_store_mb(*cq->notify, SIW_NOTIFY_NOT);
+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_NOT);
+ smp_wmb();
return true;
}
diff --git a/drivers/infiniband/sw/siw/siw_verbs.c b/drivers/infiniband/sw/siw/siw_verbs.c
index 32dc79d0e898..41c5ab293fe1 100644
--- a/drivers/infiniband/sw/siw/siw_verbs.c
+++ b/drivers/infiniband/sw/siw/siw_verbs.c
@@ -1142,10 +1142,11 @@ int siw_req_notify_cq(struct ib_cq *base_cq, enum ib_cq_notify_flags flags)
if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
/* CQ event for next solicited completion */
- smp_store_mb(*cq->notify, SIW_NOTIFY_SOLICITED);
+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_SOLICITED);
else
/* CQ event for any signalled completion */
- smp_store_mb(*cq->notify, SIW_NOTIFY_ALL);
+ WRITE_ONCE(*cq->notify, SIW_NOTIFY_ALL);
+ smp_wmb();
if (flags & IB_CQ_REPORT_MISSED_EVENTS)
return cq->cq_put - cq->cq_get;
--
2.20.0
^ permalink raw reply related
* Re: [PATCH v4 00/25] InfiniBand Transport (IBTRS) and Network Block Device (IBNBD)
From: Jinpu Wang @ 2019-07-12 7:57 UTC (permalink / raw)
To: Sagi Grimberg
Cc: Danil Kipnis, linux-block, linux-rdma, Jens Axboe,
Christoph Hellwig, bvanassche, jgg, dledford, Roman Pen,
Greg Kroah-Hartman
In-Reply-To: <aef765ed-4bb9-2211-05d0-b320cc3ac275@grimberg.me>
Hi Sagi,
> >> Another question, from what I understand from the code, the client
> >> always rdma_writes data on writes (with imm) from a remote pool of
> >> server buffers dedicated to it. Essentially all writes are immediate (no
> >> rdma reads ever). How is that different than using send wrs to a set of
> >> pre-posted recv buffers (like all others are doing)? Is it faster?
> > At the very beginning of the project we did some measurements and saw,
> > that it is faster. I'm not sure if this is still true
>
> Its not significantly faster (can't imagine why it would be).
> What could make a difference is probably the fact that you never
> do rdma reads for I/O writes which might be better. Also perhaps the
> fact that you normally don't wait for send completions before completing
> I/O (which is broken), and the fact that you batch recv operations.
I don't know how do you come to the conclusion we don't wait for send
completion before completing IO.
We do chain wr on successfull read request from server, see funtion
rdma_write_sg,
318 static int rdma_write_sg(struct ibtrs_srv_op *id)
319 {
320 struct ibtrs_srv_sess *sess = to_srv_sess(id->con->c.sess);
321 dma_addr_t dma_addr = sess->dma_addr[id->msg_id];
322 struct ibtrs_srv *srv = sess->srv;
323 struct ib_send_wr inv_wr, imm_wr;
324 struct ib_rdma_wr *wr = NULL;
snip
333 need_inval = le16_to_cpu(id->rd_msg->flags) &
IBTRS_MSG_NEED_INVAL_F;
snip
357 wr->wr.wr_cqe = &io_comp_cqe;
358 wr->wr.sg_list = list;
359 wr->wr.num_sge = 1;
360 wr->remote_addr = le64_to_cpu(id->rd_msg->desc[i].addr);
361 wr->rkey = le32_to_cpu(id->rd_msg->desc[i].key);
snip
368 if (i < (sg_cnt - 1))
369 wr->wr.next = &id->tx_wr[i + 1].wr;
370 else if (need_inval)
371 wr->wr.next = &inv_wr;
372 else
373 wr->wr.next = &imm_wr;
374
375 wr->wr.opcode = IB_WR_RDMA_WRITE;
376 wr->wr.ex.imm_data = 0;
377 wr->wr.send_flags = 0;
snip
386 if (need_inval) {
387 inv_wr.next = &imm_wr;
388 inv_wr.wr_cqe = &io_comp_cqe;
389 inv_wr.sg_list = NULL;
390 inv_wr.num_sge = 0;
391 inv_wr.opcode = IB_WR_SEND_WITH_INV;
392 inv_wr.send_flags = 0;
393 inv_wr.ex.invalidate_rkey = rkey;
394 }
395 imm_wr.next = NULL;
396 imm_wr.wr_cqe = &io_comp_cqe;
397 imm_wr.sg_list = NULL;
398 imm_wr.num_sge = 0;
399 imm_wr.opcode = IB_WR_RDMA_WRITE_WITH_IMM;
400 imm_wr.send_flags = flags;
401 imm_wr.ex.imm_data = cpu_to_be32(ibtrs_to_io_rsp_imm(id->msg_id,
402 0,
need_inval));
403
when we need to do invalidation of remote memory, there will chain WR
togather, last 2 are inv_wr, and imm_wr.
imm_wr is the last one, this is important, due to the fact RC QP are
ordered, we know when when we received
IB_WC_RECV_RDMA_WITH_IMM and w_inval is true, hardware should already
finished it's job to invalidate the MR.
If server fails to invalidate, we will do local invalidation, and wait
for completion.
On client side
284 static void complete_rdma_req(struct ibtrs_clt_io_req *req, int errno,
285 bool notify, bool can_wait)
286 {
287 struct ibtrs_clt_con *con = req->con;
288 struct ibtrs_clt_sess *sess;
289 struct ibtrs_clt *clt;
290 int err;
291
292 if (WARN_ON(!req->in_use))
293 return;
294 if (WARN_ON(!req->con))
295 return;
296 sess = to_clt_sess(con->c.sess);
297 clt = sess->clt;
298
299 if (req->sg_cnt) {
300 if (unlikely(req->dir == DMA_FROM_DEVICE &&
req->need_inv)) {
301 /*
302 * We are here to invalidate RDMA read requests
303 * ourselves. In normal scenario server should
304 * send INV for all requested RDMA reads, but
305 * we are here, thus two things could happen:
306 *
307 * 1. this is failover, when errno != 0
308 * and can_wait == 1,
309 *
310 * 2. something totally bad happened and
311 * server forgot to send INV, so we
312 * should do that ourselves.
313 */
314
315 if (likely(can_wait)) {
316 req->need_inv_comp = true;
317 } else {
318 /* This should be IO path, so
always notify */
319 WARN_ON(!notify);
320 /* Save errno for INV callback */
321 req->inv_errno = errno;
322 }
323
324 err = ibtrs_inv_rkey(req);
325 if (unlikely(err)) {
326 ibtrs_err(sess, "Send INV WR
key=%#x: %d\n",
327 req->mr->rkey, err);
328 } else if (likely(can_wait)) {
329 wait_for_completion(&req->inv_comp);
330 } else {
330 } else {
331 /*
332 * Something went wrong, so request will be
333 * completed from INV callback.
334 */
335 WARN_ON_ONCE(1);
336
337 return;
338 }
339 }
340 ib_dma_unmap_sg(sess->s.dev->ib_dev, req->sglist,
341 req->sg_cnt, req->dir);
342 }
343 if (sess->stats.enable_rdma_lat)
344 ibtrs_clt_update_rdma_lat(&sess->stats,
345 req->dir == DMA_FROM_DEVICE,
346 jiffies_to_msecs(jiffies -
req->start_jiffies));
347 ibtrs_clt_decrease_inflight(&sess->stats);
348
349 req->in_use = false;
350 req->con = NULL;
351
352 if (notify)
353 req->conf(req->priv, errno);
354 }
356 static void process_io_rsp(struct ibtrs_clt_sess *sess, u32
msg_id,
357 s16 errno, bool w_inval)
358 {
359 struct ibtrs_clt_io_req *req;
360
361 if (WARN_ON(msg_id >= sess->queue_depth))
362 return;
363
364 req = &sess->reqs[msg_id];
365 /* Drop need_inv if server responsed with invalidation */
366 req->need_inv &= !w_inval;
367 complete_rdma_req(req, errno, true, false);
368 }
Hope this clears the doubt.
Regards,
Jack
^ permalink raw reply
* [RFC PATCH] Docs: move more driver,device related docs into drivers dir follows kernel source
From: Alex Shi @ 2019-07-12 6:10 UTC (permalink / raw)
Cc: Alex Shi, linux-pci, linux-doc, linux-kernel, linuxppc-dev,
drbd-dev, linux-block, nbd, linux-ide, linux-pm, linux-crypto,
keyrings, linux-wireless, linux-media, dri-devel, linaro-mm-sig,
dmaengine, linux-edac, linux-fpga, linux-iio, linux-gpio, netdev,
linux-s390, alsa-devel, linux-usb, devel, linux-arm-kernel,
linux-amlogic, linux-tegra, intel-gfx, xen-devel, linux-input,
linux-i2c, linux-rdma, linux-leds, linux-scsi, dc395x,
esc.storagedev, megaraidlinux.pdl, osst-users, linux-watchdog
Could I have a proposal to move the following driver/devices dirs which
under Documentation/ into Documentation/drivers/, follows kernel source
acpi backlight bus cpu-freq device-mapper driver-model gpio hid
ide leds md memory mmc nfc nvmem pcmcia scsi sound watchdog
auxdisplay blockdev cdrom crypto driver-api fpga gpu
i2c infiniband lightnvm media misc mtd nvdimm PCI apidio
serial usb
More docs and dirs could move into this dir later, that could make
Documenation dir much more clear, and don't cause trouble to find them.
If it's acceptable, we could do docs pointer redirect further.
Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Cc: linux-pci@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: drbd-dev@lists.linbit.com
Cc: linux-block@vger.kernel.org
Cc: nbd@other.debian.org
Cc: linux-ide@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: linux-crypto@vger.kernel.org
Cc: keyrings@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: linux-media@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linaro-mm-sig@lists.linaro.org
Cc: dmaengine@vger.kernel.org
Cc: linux-edac@vger.kernel.org
Cc: linux-fpga@vger.kernel.org
Cc: linux-iio@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: alsa-devel@alsa-project.org
Cc: linux-usb@vger.kernel.org
Cc: devel@driverdev.osuosl.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-tegra@vger.kernel.org
Cc: intel-gfx@lists.freedesktop.org
Cc: xen-devel@lists.xenproject.org
Cc: linux-input@vger.kernel.org
Cc: linux-i2c@vger.kernel.org
Cc: linux-rdma@vger.kernel.org
Cc: linux-leds@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Cc: dc395x@twibble.org
Cc: esc.storagedev@microsemi.com
Cc: megaraidlinux.pdl@broadcom.com
Cc: osst-users@lists.sourceforge.net
Cc: linux-watchdog@vger.kernel.org
---
Documentation/{ => drivers}/PCI/MSI-HOWTO.txt | 0
Documentation/{ => drivers}/PCI/PCIEBUS-HOWTO.txt | 0
Documentation/{ => drivers}/PCI/acpi-info.txt | 0
.../{ => drivers}/PCI/endpoint/function/binding/pci-test.txt | 0
Documentation/{ => drivers}/PCI/endpoint/pci-endpoint-cfs.txt | 0
Documentation/{ => drivers}/PCI/endpoint/pci-endpoint.txt | 0
Documentation/{ => drivers}/PCI/endpoint/pci-test-function.txt | 0
Documentation/{ => drivers}/PCI/endpoint/pci-test-howto.txt | 0
Documentation/{ => drivers}/PCI/pci-error-recovery.txt | 0
Documentation/{ => drivers}/PCI/pci-iov-howto.txt | 0
Documentation/{ => drivers}/PCI/pci.txt | 0
Documentation/{ => drivers}/PCI/pcieaer-howto.txt | 0
Documentation/{ => drivers}/acpi/dsd/leds.txt | 0
Documentation/{ => drivers}/auxdisplay/cfag12864b | 0
Documentation/{ => drivers}/auxdisplay/ks0108 | 0
Documentation/{ => drivers}/auxdisplay/lcd-panel-cgram.txt | 0
Documentation/{ => drivers}/backlight/lp855x-driver.txt | 0
.../{ => drivers}/blockdev/drbd/DRBD-8.3-data-packets.svg | 0
Documentation/{ => drivers}/blockdev/drbd/DRBD-data-packets.svg | 0
Documentation/{ => drivers}/blockdev/drbd/README.txt | 0
Documentation/{ => drivers}/blockdev/drbd/conn-states-8.dot | 0
Documentation/{ => drivers}/blockdev/drbd/data-structure-v9.txt | 0
Documentation/{ => drivers}/blockdev/drbd/disk-states-8.dot | 0
.../blockdev/drbd/drbd-connection-state-overview.dot | 0
Documentation/{ => drivers}/blockdev/drbd/node-states-8.dot | 0
Documentation/{ => drivers}/blockdev/floppy.txt | 0
Documentation/{ => drivers}/blockdev/nbd.txt | 0
Documentation/{ => drivers}/blockdev/paride.txt | 0
Documentation/{ => drivers}/blockdev/ramdisk.txt | 0
Documentation/{ => drivers}/blockdev/zram.txt | 0
Documentation/{bus-devices => drivers/bus}/ti-gpmc.txt | 0
Documentation/{ => drivers}/cdrom/cdrom-standard.rst | 0
Documentation/{ => drivers}/cdrom/ide-cd.rst | 0
Documentation/{ => drivers}/cdrom/index.rst | 0
Documentation/{ => drivers}/cdrom/packet-writing.rst | 0
Documentation/{ => drivers}/cpu-freq/amd-powernow.txt | 0
Documentation/{ => drivers}/cpu-freq/core.txt | 0
Documentation/{ => drivers}/cpu-freq/cpu-drivers.txt | 0
Documentation/{ => drivers}/cpu-freq/cpufreq-nforce2.txt | 0
Documentation/{ => drivers}/cpu-freq/cpufreq-stats.txt | 0
Documentation/{ => drivers}/cpu-freq/index.txt | 0
Documentation/{ => drivers}/cpu-freq/pcc-cpufreq.txt | 0
Documentation/{ => drivers}/crypto/api-aead.rst | 0
Documentation/{ => drivers}/crypto/api-akcipher.rst | 0
Documentation/{ => drivers}/crypto/api-digest.rst | 0
Documentation/{ => drivers}/crypto/api-intro.txt | 0
Documentation/{ => drivers}/crypto/api-kpp.rst | 0
Documentation/{ => drivers}/crypto/api-rng.rst | 0
Documentation/{ => drivers}/crypto/api-samples.rst | 0
Documentation/{ => drivers}/crypto/api-skcipher.rst | 0
Documentation/{ => drivers}/crypto/api.rst | 0
Documentation/{ => drivers}/crypto/architecture.rst | 0
Documentation/{ => drivers}/crypto/asymmetric-keys.txt | 0
Documentation/{ => drivers}/crypto/async-tx-api.txt | 0
Documentation/{ => drivers}/crypto/conf.py | 0
Documentation/{ => drivers}/crypto/crypto_engine.rst | 0
Documentation/{ => drivers}/crypto/descore-readme.txt | 0
Documentation/{ => drivers}/crypto/devel-algos.rst | 0
Documentation/{ => drivers}/crypto/index.rst | 0
Documentation/{ => drivers}/crypto/intro.rst | 0
Documentation/{ => drivers}/crypto/userspace-if.rst | 0
Documentation/{ => drivers}/device-mapper/cache-policies.rst | 0
Documentation/{ => drivers}/device-mapper/cache.rst | 0
Documentation/{ => drivers}/device-mapper/delay.rst | 0
Documentation/{ => drivers}/device-mapper/dm-crypt.rst | 0
Documentation/{ => drivers}/device-mapper/dm-dust.txt | 0
Documentation/{ => drivers}/device-mapper/dm-flakey.rst | 0
Documentation/{ => drivers}/device-mapper/dm-init.rst | 0
Documentation/{ => drivers}/device-mapper/dm-integrity.rst | 0
Documentation/{ => drivers}/device-mapper/dm-io.rst | 0
Documentation/{ => drivers}/device-mapper/dm-log.rst | 0
Documentation/{ => drivers}/device-mapper/dm-queue-length.rst | 0
Documentation/{ => drivers}/device-mapper/dm-raid.rst | 0
Documentation/{ => drivers}/device-mapper/dm-service-time.rst | 0
Documentation/{ => drivers}/device-mapper/dm-uevent.rst | 0
Documentation/{ => drivers}/device-mapper/dm-zoned.rst | 0
Documentation/{ => drivers}/device-mapper/era.rst | 0
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Documentation/{ => drivers}/device-mapper/kcopyd.rst | 0
Documentation/{ => drivers}/device-mapper/linear.rst | 0
Documentation/{ => drivers}/device-mapper/log-writes.rst | 0
Documentation/{ => drivers}/device-mapper/persistent-data.rst | 0
Documentation/{ => drivers}/device-mapper/snapshot.rst | 0
Documentation/{ => drivers}/device-mapper/statistics.rst | 0
Documentation/{ => drivers}/device-mapper/striped.rst | 0
Documentation/{ => drivers}/device-mapper/switch.rst | 0
Documentation/{ => drivers}/device-mapper/thin-provisioning.rst | 0
Documentation/{ => drivers}/device-mapper/unstriped.rst | 0
Documentation/{ => drivers}/device-mapper/verity.rst | 0
Documentation/{ => drivers}/device-mapper/writecache.rst | 0
Documentation/{ => drivers}/device-mapper/zero.rst | 0
Documentation/{ => drivers}/driver-api/80211/cfg80211.rst | 0
Documentation/{ => drivers}/driver-api/80211/conf.py | 0
Documentation/{ => drivers}/driver-api/80211/index.rst | 0
Documentation/{ => drivers}/driver-api/80211/introduction.rst | 0
.../{ => drivers}/driver-api/80211/mac80211-advanced.rst | 0
Documentation/{ => drivers}/driver-api/80211/mac80211.rst | 0
Documentation/{ => drivers}/driver-api/acpi/index.rst | 0
Documentation/{ => drivers}/driver-api/acpi/linuxized-acpica.rst | 0
Documentation/{ => drivers}/driver-api/acpi/scan_handlers.rst | 0
Documentation/{ => drivers}/driver-api/basics.rst | 0
Documentation/{ => drivers}/driver-api/clk.rst | 0
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Documentation/{ => drivers}/driver-api/device_connection.rst | 0
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.../{ => drivers}/driver-api/firmware/direct-fs-lookup.rst | 0
.../{ => drivers}/driver-api/firmware/fallback-mechanisms.rst | 0
.../{ => drivers}/driver-api/firmware/firmware_cache.rst | 0
.../{ => drivers}/driver-api/firmware/fw_search_path.rst | 0
Documentation/{ => drivers}/driver-api/firmware/index.rst | 0
Documentation/{ => drivers}/driver-api/firmware/introduction.rst | 0
Documentation/{ => drivers}/driver-api/firmware/lookup-order.rst | 0
.../{ => drivers}/driver-api/firmware/other_interfaces.rst | 0
.../{ => drivers}/driver-api/firmware/request_firmware.rst | 0
Documentation/{ => drivers}/driver-api/fpga/fpga-bridge.rst | 0
Documentation/{ => drivers}/driver-api/fpga/fpga-mgr.rst | 0
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Documentation/{ => drivers}/driver-api/fpga/intro.rst | 0
Documentation/{ => drivers}/driver-api/frame-buffer.rst | 0
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Documentation/{ => drivers}/driver-api/iio/triggers.rst | 0
Documentation/{ => drivers}/driver-api/index.rst | 0
Documentation/{ => drivers}/driver-api/infrastructure.rst | 0
Documentation/{ => drivers}/driver-api/input.rst | 0
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.../{ => drivers}/driver-api/soundwire/error_handling.rst | 0
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.../{ => drivers}/driver-api/usb/writing_musb_glue_layer.rst | 0
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Documentation/{ => drivers}/driver-api/vme.rst | 0
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Documentation/{ => drivers}/driver-model/device.txt | 0
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Documentation/{ => drivers}/fpga/dfl.rst | 0
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Documentation/{ => drivers}/gpio/sysfs.rst | 0
Documentation/{ => drivers}/gpu/afbc.rst | 0
Documentation/{ => drivers}/gpu/amdgpu-dc.rst | 0
Documentation/{ => drivers}/gpu/amdgpu.rst | 0
Documentation/{ => drivers}/gpu/bridge/dw-hdmi.rst | 0
Documentation/{ => drivers}/gpu/conf.py | 0
Documentation/{ => drivers}/gpu/dp-mst/topology-figure-1.dot | 0
Documentation/{ => drivers}/gpu/dp-mst/topology-figure-2.dot | 0
Documentation/{ => drivers}/gpu/dp-mst/topology-figure-3.dot | 0
Documentation/{ => drivers}/gpu/drivers.rst | 0
Documentation/{ => drivers}/gpu/drm-client.rst | 0
Documentation/{ => drivers}/gpu/drm-internals.rst | 0
Documentation/{ => drivers}/gpu/drm-kms-helpers.rst | 0
Documentation/{ => drivers}/gpu/drm-kms.rst | 0
Documentation/{ => drivers}/gpu/drm-mm.rst | 0
Documentation/{ => drivers}/gpu/drm-uapi.rst | 0
Documentation/{ => drivers}/gpu/i915.rst | 0
Documentation/{ => drivers}/gpu/index.rst | 0
Documentation/{ => drivers}/gpu/introduction.rst | 0
Documentation/{ => drivers}/gpu/kms-properties.csv | 0
Documentation/{ => drivers}/gpu/komeda-kms.rst | 0
Documentation/{ => drivers}/gpu/meson.rst | 0
Documentation/{ => drivers}/gpu/msm-crash-dump.rst | 0
Documentation/{ => drivers}/gpu/pl111.rst | 0
Documentation/{ => drivers}/gpu/tegra.rst | 0
Documentation/{ => drivers}/gpu/tinydrm.rst | 0
Documentation/{ => drivers}/gpu/todo.rst | 0
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Documentation/{ => drivers}/sound/cards/maya44.rst | 0
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Documentation/{ => drivers}/sound/hd-audio/controls.rst | 0
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Documentation/{ => drivers}/sound/hd-audio/models.rst | 0
Documentation/{ => drivers}/sound/hd-audio/notes.rst | 0
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.../{ => drivers}/sound/kernel-api/writing-an-alsa-driver.rst | 0
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Documentation/{ => drivers}/sound/soc/jack.rst | 0
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Documentation/{ => drivers}/sound/soc/pops-clicks.rst | 0
Documentation/{ => drivers}/usb/CREDITS | 0
Documentation/{ => drivers}/usb/WUSB-Design-overview.txt | 0
Documentation/{ => drivers}/usb/acm.txt | 0
Documentation/{ => drivers}/usb/authorization.txt | 0
Documentation/{ => drivers}/usb/chipidea.txt | 0
Documentation/{ => drivers}/usb/dwc3.txt | 0
Documentation/{ => drivers}/usb/ehci.txt | 0
Documentation/{ => drivers}/usb/functionfs.txt | 0
Documentation/{ => drivers}/usb/gadget-testing.txt | 0
Documentation/{ => drivers}/usb/gadget_configfs.txt | 0
Documentation/{ => drivers}/usb/gadget_hid.txt | 0
Documentation/{ => drivers}/usb/gadget_multi.txt | 0
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Documentation/{ => drivers}/usb/iuu_phoenix.txt | 0
Documentation/{ => drivers}/usb/linux-cdc-acm.inf | 0
Documentation/{ => drivers}/usb/linux.inf | 0
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Documentation/{ => drivers}/usb/mtouchusb.txt | 0
Documentation/{ => drivers}/usb/ohci.txt | 0
Documentation/{ => drivers}/usb/rio.txt | 0
Documentation/{ => drivers}/usb/usb-help.txt | 0
Documentation/{ => drivers}/usb/usb-serial.txt | 0
Documentation/{ => drivers}/usb/usbdevfs-drop-permissions.c | 0
Documentation/{ => drivers}/usb/usbip_protocol.txt | 0
Documentation/{ => drivers}/usb/usbmon.txt | 0
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Documentation/{ => drivers}/watchdog/mlx-wdt.rst | 0
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Documentation/{ => drivers}/watchdog/watchdog-parameters.rst | 0
Documentation/{ => drivers}/watchdog/watchdog-pm.rst | 0
Documentation/{ => drivers}/watchdog/wdt.rst | 0
1079 files changed, 0 insertions(+), 0 deletions(-)
rename Documentation/{ => drivers}/PCI/MSI-HOWTO.txt (100%)
rename Documentation/{ => drivers}/PCI/PCIEBUS-HOWTO.txt (100%)
rename Documentation/{ => drivers}/PCI/acpi-info.txt (100%)
rename Documentation/{ => drivers}/PCI/endpoint/function/binding/pci-test.txt (100%)
rename Documentation/{ => drivers}/PCI/endpoint/pci-endpoint-cfs.txt (100%)
rename Documentation/{ => drivers}/PCI/endpoint/pci-endpoint.txt (100%)
rename Documentation/{ => drivers}/PCI/endpoint/pci-test-function.txt (100%)
rename Documentation/{ => drivers}/PCI/endpoint/pci-test-howto.txt (100%)
rename Documentation/{ => drivers}/PCI/pci-error-recovery.txt (100%)
rename Documentation/{ => drivers}/PCI/pci-iov-howto.txt (100%)
rename Documentation/{ => drivers}/PCI/pci.txt (100%)
rename Documentation/{ => drivers}/PCI/pcieaer-howto.txt (100%)
rename Documentation/{ => drivers}/acpi/dsd/leds.txt (100%)
rename Documentation/{ => drivers}/auxdisplay/cfag12864b (100%)
rename Documentation/{ => drivers}/auxdisplay/ks0108 (100%)
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rename Documentation/{ => drivers}/blockdev/drbd/DRBD-data-packets.svg (100%)
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rename Documentation/{ => drivers}/crypto/asymmetric-keys.txt (100%)
rename Documentation/{ => drivers}/crypto/async-tx-api.txt (100%)
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rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-g-priority.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-g-selection.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-g-sliced-vbi-cap.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-g-std.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-g-tuner.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-log-status.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-overlay.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-prepare-buf.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-qbuf.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-query-dv-timings.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-querybuf.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-querycap.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-queryctrl.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-querystd.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-reqbufs.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-s-hw-freq-seek.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-streamon.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-subdev-enum-frame-interval.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-subdev-enum-frame-size.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-subdev-enum-mbus-code.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-subdev-g-crop.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-subdev-g-fmt.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-subdev-g-frame-interval.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-subdev-g-selection.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/vidioc-subscribe-event.rst (100%)
rename Documentation/{ => drivers}/media/uapi/v4l/yuv-formats.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/au0828-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/bttv-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/bttv.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/cafe_ccic.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/cpia2.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/cx18.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/cx2341x.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/cx23885-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/cx88-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/cx88.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/davinci-vpbe.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/em28xx-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/fimc.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/fourcc.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/gspca-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/imx.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/imx7.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/index.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/ipu3.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/ivtv-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/ivtv.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/max2175.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/meye.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/omap3isp.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/omap4_camera.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/philips.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/pvrusb2.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/pxa_camera.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/qcom_camss.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/qcom_camss_8x96_graph.dot (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/qcom_camss_graph.dot (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/radiotrack.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/rcar-fdp1.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/saa7134-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/saa7134.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/saa7164-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/sh_mobile_ceu_camera.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/si470x.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/si4713.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/si476x.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/soc-camera.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/tm6000-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/tuner-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/tuners.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/usbvision-cardlist.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/uvcvideo.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/v4l-with-ir.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/vimc.dot (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/vimc.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/vivid.rst (100%)
rename Documentation/{ => drivers}/media/v4l-drivers/zr364xx.rst (100%)
rename Documentation/{ => drivers}/media/video.h.rst.exceptions (100%)
rename Documentation/{ => drivers}/media/videodev2.h.rst.exceptions (100%)
rename Documentation/{memory-devices => drivers/memory}/ti-emif.txt (100%)
rename Documentation/{misc-devices => drivers/misc}/ad525x_dpot.txt (100%)
rename Documentation/{misc-devices => drivers/misc}/apds990x.txt (100%)
rename Documentation/{misc-devices => drivers/misc}/bh1770glc.txt (100%)
rename Documentation/{misc-devices => drivers/misc}/c2port.txt (100%)
rename Documentation/{misc-devices => drivers/misc}/eeprom (100%)
rename Documentation/{misc-devices => drivers/misc}/ibmvmc.rst (100%)
rename Documentation/{misc-devices => drivers/misc}/ics932s401 (100%)
rename Documentation/{misc-devices => drivers/misc}/index.rst (100%)
rename Documentation/{misc-devices => drivers/misc}/isl29003 (100%)
rename Documentation/{misc-devices => drivers/misc}/lis3lv02d (100%)
rename Documentation/{misc-devices => drivers/misc}/max6875 (100%)
rename Documentation/{misc-devices => drivers/misc}/mei/mei-client-bus.txt (100%)
rename Documentation/{misc-devices => drivers/misc}/mei/mei.txt (100%)
rename Documentation/{misc-devices => drivers/misc}/pci-endpoint-test.txt (100%)
rename Documentation/{misc-devices => drivers/misc}/spear-pcie-gadget.txt (100%)
rename Documentation/{ => drivers}/mmc/mmc-async-req.txt (100%)
rename Documentation/{ => drivers}/mmc/mmc-dev-attrs.txt (100%)
rename Documentation/{ => drivers}/mmc/mmc-dev-parts.txt (100%)
rename Documentation/{ => drivers}/mmc/mmc-tools.txt (100%)
rename Documentation/{ => drivers}/mtd/intel-spi.txt (100%)
rename Documentation/{ => drivers}/mtd/nand_ecc.txt (100%)
rename Documentation/{ => drivers}/mtd/spi-nor.txt (100%)
rename Documentation/{ => drivers}/nfc/nfc-hci.txt (100%)
rename Documentation/{ => drivers}/nfc/nfc-pn544.txt (100%)
rename Documentation/{ => drivers}/nvdimm/btt.txt (100%)
rename Documentation/{ => drivers}/nvdimm/nvdimm.txt (100%)
rename Documentation/{ => drivers}/nvdimm/security.txt (100%)
rename Documentation/{ => drivers}/nvmem/nvmem.txt (100%)
rename Documentation/{ => drivers}/pcmcia/devicetable.rst (100%)
rename Documentation/{ => drivers}/pcmcia/driver-changes.rst (100%)
rename Documentation/{ => drivers}/pcmcia/driver.rst (100%)
rename Documentation/{ => drivers}/pcmcia/index.rst (100%)
rename Documentation/{ => drivers}/pcmcia/locking.rst (100%)
rename Documentation/{ => drivers}/rapidio/mport_cdev.txt (100%)
rename Documentation/{ => drivers}/rapidio/rapidio.txt (100%)
rename Documentation/{ => drivers}/rapidio/rio_cm.txt (100%)
rename Documentation/{ => drivers}/rapidio/sysfs.txt (100%)
rename Documentation/{ => drivers}/rapidio/tsi721.txt (100%)
rename Documentation/{ => drivers}/scsi/53c700.txt (100%)
rename Documentation/{ => drivers}/scsi/BusLogic.txt (100%)
rename Documentation/{ => drivers}/scsi/ChangeLog.arcmsr (100%)
rename Documentation/{ => drivers}/scsi/ChangeLog.ips (100%)
rename Documentation/{ => drivers}/scsi/ChangeLog.lpfc (100%)
rename Documentation/{ => drivers}/scsi/ChangeLog.megaraid (100%)
rename Documentation/{ => drivers}/scsi/ChangeLog.megaraid_sas (100%)
rename Documentation/{ => drivers}/scsi/ChangeLog.ncr53c8xx (100%)
rename Documentation/{ => drivers}/scsi/ChangeLog.sym53c8xx (100%)
rename Documentation/{ => drivers}/scsi/ChangeLog.sym53c8xx_2 (100%)
rename Documentation/{ => drivers}/scsi/FlashPoint.txt (100%)
rename Documentation/{ => drivers}/scsi/LICENSE.FlashPoint (100%)
rename Documentation/{ => drivers}/scsi/LICENSE.qla2xxx (100%)
rename Documentation/{ => drivers}/scsi/LICENSE.qla4xxx (100%)
rename Documentation/{ => drivers}/scsi/NinjaSCSI.txt (100%)
rename Documentation/{ => drivers}/scsi/aacraid.txt (100%)
rename Documentation/{ => drivers}/scsi/advansys.txt (100%)
rename Documentation/{ => drivers}/scsi/aha152x.txt (100%)
rename Documentation/{ => drivers}/scsi/aic79xx.txt (100%)
rename Documentation/{ => drivers}/scsi/aic7xxx.txt (100%)
rename Documentation/{ => drivers}/scsi/arcmsr_spec.txt (100%)
rename Documentation/{ => drivers}/scsi/bfa.txt (100%)
rename Documentation/{ => drivers}/scsi/bnx2fc.txt (100%)
rename Documentation/{ => drivers}/scsi/cxgb3i.txt (100%)
rename Documentation/{ => drivers}/scsi/dc395x.txt (100%)
rename Documentation/{ => drivers}/scsi/dpti.txt (100%)
rename Documentation/{ => drivers}/scsi/g_NCR5380.txt (100%)
rename Documentation/{ => drivers}/scsi/hpsa.txt (100%)
rename Documentation/{ => drivers}/scsi/hptiop.txt (100%)
rename Documentation/{ => drivers}/scsi/libsas.txt (100%)
rename Documentation/{ => drivers}/scsi/link_power_management_policy.txt (100%)
rename Documentation/{ => drivers}/scsi/lpfc.txt (100%)
rename Documentation/{ => drivers}/scsi/megaraid.txt (100%)
rename Documentation/{ => drivers}/scsi/ncr53c8xx.txt (100%)
rename Documentation/{ => drivers}/scsi/osst.txt (100%)
rename Documentation/{ => drivers}/scsi/ppa.txt (100%)
rename Documentation/{ => drivers}/scsi/qlogicfas.txt (100%)
rename Documentation/{ => drivers}/scsi/scsi-changer.txt (100%)
rename Documentation/{ => drivers}/scsi/scsi-generic.txt (100%)
rename Documentation/{ => drivers}/scsi/scsi-parameters.txt (100%)
rename Documentation/{ => drivers}/scsi/scsi.txt (100%)
rename Documentation/{ => drivers}/scsi/scsi_eh.txt (100%)
rename Documentation/{ => drivers}/scsi/scsi_fc_transport.txt (100%)
rename Documentation/{ => drivers}/scsi/scsi_mid_low_api.txt (100%)
rename Documentation/{ => drivers}/scsi/scsi_transport_srp/Makefile (100%)
rename Documentation/{ => drivers}/scsi/scsi_transport_srp/rport_state_diagram.dot (100%)
rename Documentation/{ => drivers}/scsi/sd-parameters.txt (100%)
rename Documentation/{ => drivers}/scsi/smartpqi.txt (100%)
rename Documentation/{ => drivers}/scsi/st.txt (100%)
rename Documentation/{ => drivers}/scsi/sym53c500_cs.txt (100%)
rename Documentation/{ => drivers}/scsi/sym53c8xx_2.txt (100%)
rename Documentation/{ => drivers}/scsi/tcm_qla2xxx.txt (100%)
rename Documentation/{ => drivers}/scsi/ufs.txt (100%)
rename Documentation/{ => drivers}/scsi/wd719x.txt (100%)
rename Documentation/{ => drivers}/serial/cyclades_z.rst (100%)
rename Documentation/{ => drivers}/serial/driver.rst (100%)
rename Documentation/{ => drivers}/serial/index.rst (100%)
rename Documentation/{ => drivers}/serial/moxa-smartio.rst (100%)
rename Documentation/{ => drivers}/serial/n_gsm.rst (100%)
rename Documentation/{ => drivers}/serial/rocket.rst (100%)
rename Documentation/{ => drivers}/serial/serial-iso7816.rst (100%)
rename Documentation/{ => drivers}/serial/serial-rs485.rst (100%)
rename Documentation/{ => drivers}/serial/tty.rst (100%)
rename Documentation/{ => drivers}/sound/alsa-configuration.rst (100%)
rename Documentation/{ => drivers}/sound/cards/audigy-mixer.rst (100%)
rename Documentation/{ => drivers}/sound/cards/audiophile-usb.rst (100%)
rename Documentation/{ => drivers}/sound/cards/bt87x.rst (100%)
rename Documentation/{ => drivers}/sound/cards/cmipci.rst (100%)
rename Documentation/{ => drivers}/sound/cards/emu10k1-jack.rst (100%)
rename Documentation/{ => drivers}/sound/cards/hdspm.rst (100%)
rename Documentation/{ => drivers}/sound/cards/img-spdif-in.rst (100%)
rename Documentation/{ => drivers}/sound/cards/index.rst (100%)
rename Documentation/{ => drivers}/sound/cards/joystick.rst (100%)
rename Documentation/{ => drivers}/sound/cards/maya44.rst (100%)
rename Documentation/{ => drivers}/sound/cards/mixart.rst (100%)
rename Documentation/{ => drivers}/sound/cards/multisound.sh (100%)
rename Documentation/{ => drivers}/sound/cards/sb-live-mixer.rst (100%)
rename Documentation/{ => drivers}/sound/cards/serial-u16550.rst (100%)
rename Documentation/{ => drivers}/sound/cards/via82xx-mixer.rst (100%)
rename Documentation/{ => drivers}/sound/conf.py (100%)
rename Documentation/{ => drivers}/sound/designs/channel-mapping-api.rst (100%)
rename Documentation/{ => drivers}/sound/designs/compress-offload.rst (100%)
rename Documentation/{ => drivers}/sound/designs/control-names.rst (100%)
rename Documentation/{ => drivers}/sound/designs/index.rst (100%)
rename Documentation/{ => drivers}/sound/designs/jack-controls.rst (100%)
rename Documentation/{ => drivers}/sound/designs/oss-emulation.rst (100%)
rename Documentation/{ => drivers}/sound/designs/powersave.rst (100%)
rename Documentation/{ => drivers}/sound/designs/procfile.rst (100%)
rename Documentation/{ => drivers}/sound/designs/seq-oss.rst (100%)
rename Documentation/{ => drivers}/sound/designs/timestamping.rst (100%)
rename Documentation/{ => drivers}/sound/designs/tracepoints.rst (100%)
rename Documentation/{ => drivers}/sound/hd-audio/controls.rst (100%)
rename Documentation/{ => drivers}/sound/hd-audio/dp-mst.rst (100%)
rename Documentation/{ => drivers}/sound/hd-audio/index.rst (100%)
rename Documentation/{ => drivers}/sound/hd-audio/models.rst (100%)
rename Documentation/{ => drivers}/sound/hd-audio/notes.rst (100%)
rename Documentation/{ => drivers}/sound/index.rst (100%)
rename Documentation/{ => drivers}/sound/kernel-api/alsa-driver-api.rst (100%)
rename Documentation/{ => drivers}/sound/kernel-api/index.rst (100%)
rename Documentation/{ => drivers}/sound/kernel-api/writing-an-alsa-driver.rst (100%)
rename Documentation/{ => drivers}/sound/soc/clocking.rst (100%)
rename Documentation/{ => drivers}/sound/soc/codec-to-codec.rst (100%)
rename Documentation/{ => drivers}/sound/soc/codec.rst (100%)
rename Documentation/{ => drivers}/sound/soc/dai.rst (100%)
rename Documentation/{ => drivers}/sound/soc/dapm.rst (100%)
rename Documentation/{ => drivers}/sound/soc/dpcm.rst (100%)
rename Documentation/{ => drivers}/sound/soc/index.rst (100%)
rename Documentation/{ => drivers}/sound/soc/jack.rst (100%)
rename Documentation/{ => drivers}/sound/soc/machine.rst (100%)
rename Documentation/{ => drivers}/sound/soc/overview.rst (100%)
rename Documentation/{ => drivers}/sound/soc/platform.rst (100%)
rename Documentation/{ => drivers}/sound/soc/pops-clicks.rst (100%)
rename Documentation/{ => drivers}/usb/CREDITS (100%)
rename Documentation/{ => drivers}/usb/WUSB-Design-overview.txt (100%)
rename Documentation/{ => drivers}/usb/acm.txt (100%)
rename Documentation/{ => drivers}/usb/authorization.txt (100%)
rename Documentation/{ => drivers}/usb/chipidea.txt (100%)
rename Documentation/{ => drivers}/usb/dwc3.txt (100%)
rename Documentation/{ => drivers}/usb/ehci.txt (100%)
rename Documentation/{ => drivers}/usb/functionfs.txt (100%)
rename Documentation/{ => drivers}/usb/gadget-testing.txt (100%)
rename Documentation/{ => drivers}/usb/gadget_configfs.txt (100%)
rename Documentation/{ => drivers}/usb/gadget_hid.txt (100%)
rename Documentation/{ => drivers}/usb/gadget_multi.txt (100%)
rename Documentation/{ => drivers}/usb/gadget_printer.txt (100%)
rename Documentation/{ => drivers}/usb/gadget_serial.txt (100%)
rename Documentation/{ => drivers}/usb/iuu_phoenix.txt (100%)
rename Documentation/{ => drivers}/usb/linux-cdc-acm.inf (100%)
rename Documentation/{ => drivers}/usb/linux.inf (100%)
rename Documentation/{ => drivers}/usb/mass-storage.txt (100%)
rename Documentation/{ => drivers}/usb/misc_usbsevseg.txt (100%)
rename Documentation/{ => drivers}/usb/mtouchusb.txt (100%)
rename Documentation/{ => drivers}/usb/ohci.txt (100%)
rename Documentation/{ => drivers}/usb/rio.txt (100%)
rename Documentation/{ => drivers}/usb/usb-help.txt (100%)
rename Documentation/{ => drivers}/usb/usb-serial.txt (100%)
rename Documentation/{ => drivers}/usb/usbdevfs-drop-permissions.c (100%)
rename Documentation/{ => drivers}/usb/usbip_protocol.txt (100%)
rename Documentation/{ => drivers}/usb/usbmon.txt (100%)
rename Documentation/{ => drivers}/usb/wusb-cbaf (100%)
rename Documentation/{ => drivers}/watchdog/convert_drivers_to_kernel_api.rst (100%)
rename Documentation/{ => drivers}/watchdog/hpwdt.rst (100%)
rename Documentation/{ => drivers}/watchdog/index.rst (100%)
rename Documentation/{ => drivers}/watchdog/mlx-wdt.rst (100%)
rename Documentation/{ => drivers}/watchdog/pcwd-watchdog.rst (100%)
rename Documentation/{ => drivers}/watchdog/watchdog-api.rst (100%)
rename Documentation/{ => drivers}/watchdog/watchdog-kernel-api.rst (100%)
rename Documentation/{ => drivers}/watchdog/watchdog-parameters.rst (100%)
rename Documentation/{ => drivers}/watchdog/watchdog-pm.rst (100%)
rename Documentation/{ => drivers}/watchdog/wdt.rst (100%)
diff --git a/Documentation/PCI/MSI-HOWTO.txt b/Documentation/drivers/PCI/MSI-HOWTO.txt
similarity index 100%
rename from Documentation/PCI/MSI-HOWTO.txt
rename to Documentation/drivers/PCI/MSI-HOWTO.txt
diff --git a/Documentation/PCI/PCIEBUS-HOWTO.txt b/Documentation/drivers/PCI/PCIEBUS-HOWTO.txt
similarity index 100%
rename from Documentation/PCI/PCIEBUS-HOWTO.txt
rename to Documentation/drivers/PCI/PCIEBUS-HOWTO.txt
diff --git a/Documentation/PCI/acpi-info.txt b/Documentation/drivers/PCI/acpi-info.txt
similarity index 100%
rename from Documentation/PCI/acpi-info.txt
rename to Documentation/drivers/PCI/acpi-info.txt
diff --git a/Documentation/PCI/endpoint/function/binding/pci-test.txt b/Documentation/drivers/PCI/endpoint/function/binding/pci-test.txt
similarity index 100%
rename from Documentation/PCI/endpoint/function/binding/pci-test.txt
rename to Documentation/drivers/PCI/endpoint/function/binding/pci-test.txt
diff --git a/Documentation/PCI/endpoint/pci-endpoint-cfs.txt b/Documentation/drivers/PCI/endpoint/pci-endpoint-cfs.txt
similarity index 100%
rename from Documentation/PCI/endpoint/pci-endpoint-cfs.txt
rename to Documentation/drivers/PCI/endpoint/pci-endpoint-cfs.txt
diff --git a/Documentation/PCI/endpoint/pci-endpoint.txt b/Documentation/drivers/PCI/endpoint/pci-endpoint.txt
similarity index 100%
rename from Documentation/PCI/endpoint/pci-endpoint.txt
rename to Documentation/drivers/PCI/endpoint/pci-endpoint.txt
diff --git a/Documentation/PCI/endpoint/pci-test-function.txt b/Documentation/drivers/PCI/endpoint/pci-test-function.txt
similarity index 100%
rename from Documentation/PCI/endpoint/pci-test-function.txt
rename to Documentation/drivers/PCI/endpoint/pci-test-function.txt
diff --git a/Documentation/PCI/endpoint/pci-test-howto.txt b/Documentation/drivers/PCI/endpoint/pci-test-howto.txt
similarity index 100%
rename from Documentation/PCI/endpoint/pci-test-howto.txt
rename to Documentation/drivers/PCI/endpoint/pci-test-howto.txt
diff --git a/Documentation/PCI/pci-error-recovery.txt b/Documentation/drivers/PCI/pci-error-recovery.txt
similarity index 100%
rename from Documentation/PCI/pci-error-recovery.txt
rename to Documentation/drivers/PCI/pci-error-recovery.txt
diff --git a/Documentation/PCI/pci-iov-howto.txt b/Documentation/drivers/PCI/pci-iov-howto.txt
similarity index 100%
rename from Documentation/PCI/pci-iov-howto.txt
rename to Documentation/drivers/PCI/pci-iov-howto.txt
diff --git a/Documentation/PCI/pci.txt b/Documentation/drivers/PCI/pci.txt
similarity index 100%
rename from Documentation/PCI/pci.txt
rename to Documentation/drivers/PCI/pci.txt
diff --git a/Documentation/PCI/pcieaer-howto.txt b/Documentation/drivers/PCI/pcieaer-howto.txt
similarity index 100%
rename from Documentation/PCI/pcieaer-howto.txt
rename to Documentation/drivers/PCI/pcieaer-howto.txt
diff --git a/Documentation/acpi/dsd/leds.txt b/Documentation/drivers/acpi/dsd/leds.txt
similarity index 100%
rename from Documentation/acpi/dsd/leds.txt
rename to Documentation/drivers/acpi/dsd/leds.txt
diff --git a/Documentation/auxdisplay/cfag12864b b/Documentation/drivers/auxdisplay/cfag12864b
similarity index 100%
rename from Documentation/auxdisplay/cfag12864b
rename to Documentation/drivers/auxdisplay/cfag12864b
diff --git a/Documentation/auxdisplay/ks0108 b/Documentation/drivers/auxdisplay/ks0108
similarity index 100%
rename from Documentation/auxdisplay/ks0108
rename to Documentation/drivers/auxdisplay/ks0108
diff --git a/Documentation/auxdisplay/lcd-panel-cgram.txt b/Documentation/drivers/auxdisplay/lcd-panel-cgram.txt
similarity index 100%
rename from Documentation/auxdisplay/lcd-panel-cgram.txt
rename to Documentation/drivers/auxdisplay/lcd-panel-cgram.txt
diff --git a/Documentation/backlight/lp855x-driver.txt b/Documentation/drivers/backlight/lp855x-driver.txt
similarity index 100%
rename from Documentation/backlight/lp855x-driver.txt
rename to Documentation/drivers/backlight/lp855x-driver.txt
diff --git a/Documentation/blockdev/drbd/DRBD-8.3-data-packets.svg b/Documentation/drivers/blockdev/drbd/DRBD-8.3-data-packets.svg
similarity index 100%
rename from Documentation/blockdev/drbd/DRBD-8.3-data-packets.svg
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diff --git a/Documentation/blockdev/drbd/DRBD-data-packets.svg b/Documentation/drivers/blockdev/drbd/DRBD-data-packets.svg
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--
2.19.1.856.g8858448bb
^ permalink raw reply
* Re: [PATCH rdma-next] lib/dim: Prevent overflow in calculation of ratio statistics
From: Leon Romanovsky @ 2019-07-12 6:03 UTC (permalink / raw)
To: Jason Gunthorpe; +Cc: Doug Ledford, RDMA mailing list, Yamin Friedman
In-Reply-To: <20190711173110.GN25821@mellanox.com>
On Thu, Jul 11, 2019 at 05:31:14PM +0000, Jason Gunthorpe wrote:
> On Thu, Jul 11, 2019 at 08:19:22PM +0300, Leon Romanovsky wrote:
> > On Thu, Jul 11, 2019 at 04:11:07PM +0000, Jason Gunthorpe wrote:
> > > On Thu, Jul 11, 2019 at 06:47:34PM +0300, Leon Romanovsky wrote:
> > > > > > diff --git a/lib/dim/dim.c b/lib/dim/dim.c
> > > > > > index 439d641ec796..38045d6d0538 100644
> > > > > > +++ b/lib/dim/dim.c
> > > > > > @@ -74,8 +74,8 @@ void dim_calc_stats(struct dim_sample *start, struct dim_sample *end,
> > > > > > delta_us);
> > > > > > curr_stats->cpms = DIV_ROUND_UP(ncomps * USEC_PER_MSEC, delta_us);
> > > > > > if (curr_stats->epms != 0)
> > > > > > - curr_stats->cpe_ratio =
> > > > > > - (curr_stats->cpms * 100) / curr_stats->epms;
> > > > > > + curr_stats->cpe_ratio = DIV_ROUND_DOWN_ULL(
> > > > > > + curr_stats->cpms * 100, curr_stats->epms);
> > > > >
> > > > > This will still potentially overfow the 'int' for cpe_ratio if epms <
> > > > > 100 ?
> > > >
> > > > I assumed that assignment to "unsigned long long" will do the trick.
> > > > https://elixir.bootlin.com/linux/latest/source/include/linux/kernel.h#L94
> > >
> > > That only protects the multiply, the result of DIV_ROUND_DOWN_ULL is
> > > casted to int.
> >
> > It is ok, the result is "int" and it will be small, 100 in multiply
> > represents percentage.
>
> Percentage would be divide by 100..
>
> Like I said it will overflow if epms < 100 ...
It is unlikely to happen because cpe_ratio is between 0 to 100 and cpms
* 100 is not large at all.
UBSAN error is "theoretical" overflow.
Thanks
>
> Jason
^ permalink raw reply
* Re: regression: nvme rdma with bnxt_re0 broken
From: Selvin Xavier @ 2019-07-12 3:45 UTC (permalink / raw)
To: Parav Pandit
Cc: Yi Zhang, linux-nvme@lists.infradead.org, Daniel Jurgens,
linux-rdma@vger.kernel.org, Devesh Sharma
In-Reply-To: <AM0PR05MB4866DEDB9DE4379F6A6EF15BD1F20@AM0PR05MB4866.eurprd05.prod.outlook.com>
On Fri, Jul 12, 2019 at 8:19 AM Parav Pandit <parav@mellanox.com> wrote:
>
> Hi Yi Zhang,
>
> > -----Original Message-----
> > From: linux-rdma-owner@vger.kernel.org <linux-rdma-
> > owner@vger.kernel.org> On Behalf Of Yi Zhang
> > Sent: Friday, July 12, 2019 7:23 AM
> > To: Parav Pandit <parav@mellanox.com>; linux-nvme@lists.infradead.org
> > Cc: Daniel Jurgens <danielj@mellanox.com>; linux-rdma@vger.kernel.org;
> > Devesh Sharma <devesh.sharma@broadcom.com>;
> > selvin.xavier@broadcom.com
> > Subject: Re: regression: nvme rdma with bnxt_re0 broken
> >
> > Hi Parav
> >
> > Here is the info, let me know if it's enough, thanks.
> >
> > [root@rdma-perf-07 ~]$ echo -n "module ib_core +p" >
> > /sys/kernel/debug/dynamic_debug/control
> > [root@rdma-perf-07 ~]$ ifdown bnxt_roce
> > Device 'bnxt_roce' successfully disconnected.
> > [root@rdma-perf-07 ~]$ ifup bnxt_roce
> > Connection successfully activated (D-Bus active path:
> > /org/freedesktop/NetworkManager/ActiveConnection/16)
> > [root@rdma-perf-07 ~]$ sh a.sh
> > DEV PORT INDEX GID IPv4 VER DEV
> > --- ---- ----- --- ------------ --- ---
> > bnxt_re0 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > v1 bnxt_roce
> > bnxt_re0 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > v2 bnxt_roce
> > bnxt_re0 1 10 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
> > 172.31.43.187 v1 bnxt_roce.43
> > bnxt_re0 1 11 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
> > 172.31.43.187 v2 bnxt_roce.43
> > bnxt_re0 1 2 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > v1 bnxt_roce.45
> > bnxt_re0 1 3 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > v2 bnxt_roce.45
> > bnxt_re0 1 4 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > v1 bnxt_roce.43
> > bnxt_re0 1 5 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> > v2 bnxt_roce.43
> > bnxt_re0 1 6 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > 172.31.40.187 v1 bnxt_roce
> > bnxt_re0 1 7 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > 172.31.40.187 v2 bnxt_roce
> > bnxt_re0 1 8 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
> > 172.31.45.187 v1 bnxt_roce.45
> > bnxt_re0 1 9 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
> > 172.31.45.187 v2 bnxt_roce.45
> > bnxt_re1 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
> > v1 lom_2
> > bnxt_re1 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
> > v2 lom_2
> > cxgb4_0 1 0 0007:433b:f5b0:0000:0000:0000:0000:0000 v1
> > cxgb4_0 2 0 0007:433b:f5b8:0000:0000:0000:0000:0000 v1
> > hfi1_0 1 0 fe80:0000:0000:0000:0011:7501:0109:6c60 v1
> > hfi1_0 1 1 fe80:0000:0000:0000:0006:6a00:0000:0005 v1
> > mlx5_0 1 0 fe80:0000:0000:0000:506b:4b03:00f3:8a38 v1
> > n_gids_found=19
> >
> > [root@rdma-perf-07 ~]$ dmesg | tail -15
> > [ 19.744421] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8002: link
> > becomes ready [ 19.758371] IPv6: ADDRCONF(NETDEV_CHANGE):
> > mlx5_ib0.8004: link becomes ready [ 20.010469] hfi1 0000:d8:00.0: hfi1_0:
> > Switching to NO_DMA_RTAIL [ 20.440580] IPv6:
> > ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8006: link becomes ready
> > [ 21.098510] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
> > requested: 8. Max supported is 2.
> > [ 21.324341] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
> > requested: 8. Max supported is 2.
> > [ 22.058647] IPv6: ADDRCONF(NETDEV_CHANGE): hfi1_opa0: link becomes
> > ready [ 211.407329] _ib_cache_gid_del: can't delete gid
> > fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22 [ 211.407334]
> > _ib_cache_gid_del: can't delete gid
> > fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22 [ 211.425275] infiniband
> > bnxt_re0: del_gid port=1 index=6 gid
> > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > [ 211.425280] infiniband bnxt_re0: free_gid_entry_locked port=1 index=6 gid
> > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > [ 211.425292] infiniband bnxt_re0: del_gid port=1 index=7 gid
> > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > [ 211.425461] infiniband bnxt_re0: free_gid_entry_locked port=1 index=7 gid
> > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > [ 225.474061] infiniband bnxt_re0: store_gid_entry port=1 index=6 gid
> > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> > [ 225.474075] infiniband bnxt_re0: store_gid_entry port=1 index=7 gid
> > 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> >
> >
> GID table looks fine.
>
The GID table has fe80:0000:0000:0000:020a:f7ff:fee3:6e32 entry
repeated 6 times. 2 for each interface
bnxt_roce, bnxt_roce.43 and bnxt_roce.45. Is this expected to have
same gid entries for vlan and base interfaces? As you mentioned
earlier, driver's assumption
that only 2 GID entries identical (one for RoCE v1 and one for RoCE
v2) is breaking here.
> > On 7/12/19 12:18 AM, Parav Pandit wrote:
> > > Sagi,
> > >
> > > This is better one to cc to linux-rdma.
> > >
> > > + Devesh, Selvin.
> > >
> > >> -----Original Message-----
> > >> From: Parav Pandit
> > >> Sent: Thursday, July 11, 2019 6:25 PM
> > >> To: Yi Zhang <yi.zhang@redhat.com>; linux-nvme@lists.infradead.org
> > >> Cc: Daniel Jurgens <danielj@mellanox.com>
> > >> Subject: RE: regression: nvme rdma with bnxt_re0 broken
> > >>
> > >> Hi Yi Zhang,
> > >>
> > >>> -----Original Message-----
> > >>> From: Yi Zhang <yi.zhang@redhat.com>
> > >>> Sent: Thursday, July 11, 2019 3:17 PM
> > >>> To: linux-nvme@lists.infradead.org
> > >>> Cc: Daniel Jurgens <danielj@mellanox.com>; Parav Pandit
> > >>> <parav@mellanox.com>
> > >>> Subject: regression: nvme rdma with bnxt_re0 broken
> > >>>
> > >>> Hello
> > >>>
> > >>> 'nvme connect' failed when use bnxt_re0 on latest upstream build[1],
> > >>> by bisecting I found it was introduced from v5.2.0-rc1 with [2], it
> > >>> works after I revert it.
> > >>> Let me know if you need more info, thanks.
> > >>>
> > >>> [1]
> > >>> [root@rdma-perf-07 ~]$ nvme connect -t rdma -a 172.31.40.125 -s 4420
> > >>> -n testnqn Failed to write to /dev/nvme-fabrics: Bad address
> > >>>
> > >>> [root@rdma-perf-07 ~]$ dmesg
> > >>> [ 476.320742] bnxt_en 0000:19:00.0: QPLIB: cmdq[0x4b9]=0x15 status 0x5
>
> Devesh, Selvin,
>
> What does this error mean?
> bnxt_qplib_create_ah() is failing.
>
We are passing a wrong index for the GID to FW because of the
assumption mentioned earlier.
FW is failing command due to this.
> > >>> [ 476.327103] infiniband bnxt_re0: Failed to allocate HW AH [
> > >>> 476.332525] nvme nvme2: rdma_connect failed (-14).
> > >>> [ 476.343552] nvme nvme2: rdma connection establishment failed
> > >>> (-14)
> > >>>
> > >>> [root@rdma-perf-07 ~]$ lspci | grep -i Broadcom
> > >>> 01:00.0 Ethernet controller: Broadcom Inc. and subsidiaries
> > >>> NetXtreme
> > >>> BCM5720 2-port Gigabit Ethernet PCIe
> > >>> 01:00.1 Ethernet controller: Broadcom Inc. and subsidiaries
> > >>> NetXtreme
> > >>> BCM5720 2-port Gigabit Ethernet PCIe
> > >>> 18:00.0 RAID bus controller: Broadcom / LSI MegaRAID SAS-3 3008
> > >>> [Fury] (rev
> > >>> 02)
> > >>> 19:00.0 Ethernet controller: Broadcom Inc. and subsidiaries BCM57412
> > >>> NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
> > >>> 19:00.1 Ethernet controller: Broadcom Inc. and subsidiaries BCM57412
> > >>> NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
> > >>>
> > >>>
> > >>> [2]
> > >>> commit 823b23da71132b80d9f41ab667c68b112455f3b6
> > >>> Author: Parav Pandit <parav@mellanox.com>
> > >>> Date: Wed Apr 10 11:23:03 2019 +0300
> > >>>
> > >>> IB/core: Allow vlan link local address based RoCE GIDs
> > >>>
> > >>> IPv6 link local address for a VLAN netdevice has nothing to do with its
> > >>> resemblance with the default GID, because VLAN link local GID is in
> > >>> different layer 2 domain.
> > >>>
> > >>> Now that RoCE MAD packet processing and route resolution consider
> > the
> > >>> right GID index, there is no need for an unnecessary check which
> > prevents
> > >>> the addition of vlan based IPv6 link local GIDs.
> > >>>
> > >>> Signed-off-by: Parav Pandit <parav@mellanox.com>
> > >>> Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
> > >>> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
> > >>> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
> > >>>
> > >>>
> > >>>
> > >>> Best Regards,
> > >>> Yi Zhang
> > >>>
> > >> I need some more information from you to debug this issue as I don’t
> > >> have the hw.
> > >> The highlighted patch added support for IPv6 link local address for
> > >> vlan. I am unsure how this can affect IPv4 AH creation for which there is
> > failure.
> > >>
> > >> 1. Before you assign the IP address to the netdevice, Please do, echo
> > >> -n "module ib_core +p" > /sys/kernel/debug/dynamic_debug/control
> > >>
> > >> Please share below output before doing nvme connect.
> > >> 2. Output of script [1]
> > >> $ show_gids script
> > >> If getting this script is problematic, share the output of,
> > >>
> > >> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gids/*
> > >> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gid_attrs/ndevs/*
> > >> $ ip link show
> > >> $ip addr show
> > >> $ dmesg
> > >>
> > >> [1] https://community.mellanox.com/s/article/understanding-show-gids-
> > >> script#jive_content_id_The_Script
> > >>
> > >> I suspect that driver's assumption about GID indices might have gone
> > >> wrong here in drivers/infiniband/hw/bnxt_re/ib_verbs.c.
> > >> Lets see about results to confirm that.
> > > _______________________________________________
> > > Linux-nvme mailing list
> > > Linux-nvme@lists.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-nvme
^ permalink raw reply
* RE: regression: nvme rdma with bnxt_re0 broken
From: Parav Pandit @ 2019-07-12 2:49 UTC (permalink / raw)
To: Yi Zhang, linux-nvme@lists.infradead.org
Cc: Daniel Jurgens, linux-rdma@vger.kernel.org, Devesh Sharma,
selvin.xavier@broadcom.com
In-Reply-To: <66d43fd8-18e8-8b9d-90e3-ee2804d56889@redhat.com>
Hi Yi Zhang,
> -----Original Message-----
> From: linux-rdma-owner@vger.kernel.org <linux-rdma-
> owner@vger.kernel.org> On Behalf Of Yi Zhang
> Sent: Friday, July 12, 2019 7:23 AM
> To: Parav Pandit <parav@mellanox.com>; linux-nvme@lists.infradead.org
> Cc: Daniel Jurgens <danielj@mellanox.com>; linux-rdma@vger.kernel.org;
> Devesh Sharma <devesh.sharma@broadcom.com>;
> selvin.xavier@broadcom.com
> Subject: Re: regression: nvme rdma with bnxt_re0 broken
>
> Hi Parav
>
> Here is the info, let me know if it's enough, thanks.
>
> [root@rdma-perf-07 ~]$ echo -n "module ib_core +p" >
> /sys/kernel/debug/dynamic_debug/control
> [root@rdma-perf-07 ~]$ ifdown bnxt_roce
> Device 'bnxt_roce' successfully disconnected.
> [root@rdma-perf-07 ~]$ ifup bnxt_roce
> Connection successfully activated (D-Bus active path:
> /org/freedesktop/NetworkManager/ActiveConnection/16)
> [root@rdma-perf-07 ~]$ sh a.sh
> DEV PORT INDEX GID IPv4 VER DEV
> --- ---- ----- --- ------------ --- ---
> bnxt_re0 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> v1 bnxt_roce
> bnxt_re0 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> v2 bnxt_roce
> bnxt_re0 1 10 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
> 172.31.43.187 v1 bnxt_roce.43
> bnxt_re0 1 11 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
> 172.31.43.187 v2 bnxt_roce.43
> bnxt_re0 1 2 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> v1 bnxt_roce.45
> bnxt_re0 1 3 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> v2 bnxt_roce.45
> bnxt_re0 1 4 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> v1 bnxt_roce.43
> bnxt_re0 1 5 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
> v2 bnxt_roce.43
> bnxt_re0 1 6 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> 172.31.40.187 v1 bnxt_roce
> bnxt_re0 1 7 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> 172.31.40.187 v2 bnxt_roce
> bnxt_re0 1 8 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
> 172.31.45.187 v1 bnxt_roce.45
> bnxt_re0 1 9 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
> 172.31.45.187 v2 bnxt_roce.45
> bnxt_re1 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
> v1 lom_2
> bnxt_re1 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
> v2 lom_2
> cxgb4_0 1 0 0007:433b:f5b0:0000:0000:0000:0000:0000 v1
> cxgb4_0 2 0 0007:433b:f5b8:0000:0000:0000:0000:0000 v1
> hfi1_0 1 0 fe80:0000:0000:0000:0011:7501:0109:6c60 v1
> hfi1_0 1 1 fe80:0000:0000:0000:0006:6a00:0000:0005 v1
> mlx5_0 1 0 fe80:0000:0000:0000:506b:4b03:00f3:8a38 v1
> n_gids_found=19
>
> [root@rdma-perf-07 ~]$ dmesg | tail -15
> [ 19.744421] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8002: link
> becomes ready [ 19.758371] IPv6: ADDRCONF(NETDEV_CHANGE):
> mlx5_ib0.8004: link becomes ready [ 20.010469] hfi1 0000:d8:00.0: hfi1_0:
> Switching to NO_DMA_RTAIL [ 20.440580] IPv6:
> ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8006: link becomes ready
> [ 21.098510] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
> requested: 8. Max supported is 2.
> [ 21.324341] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
> requested: 8. Max supported is 2.
> [ 22.058647] IPv6: ADDRCONF(NETDEV_CHANGE): hfi1_opa0: link becomes
> ready [ 211.407329] _ib_cache_gid_del: can't delete gid
> fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22 [ 211.407334]
> _ib_cache_gid_del: can't delete gid
> fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22 [ 211.425275] infiniband
> bnxt_re0: del_gid port=1 index=6 gid
> 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> [ 211.425280] infiniband bnxt_re0: free_gid_entry_locked port=1 index=6 gid
> 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> [ 211.425292] infiniband bnxt_re0: del_gid port=1 index=7 gid
> 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> [ 211.425461] infiniband bnxt_re0: free_gid_entry_locked port=1 index=7 gid
> 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> [ 225.474061] infiniband bnxt_re0: store_gid_entry port=1 index=6 gid
> 0000:0000:0000:0000:0000:ffff:ac1f:28bb
> [ 225.474075] infiniband bnxt_re0: store_gid_entry port=1 index=7 gid
> 0000:0000:0000:0000:0000:ffff:ac1f:28bb
>
>
GID table looks fine.
> On 7/12/19 12:18 AM, Parav Pandit wrote:
> > Sagi,
> >
> > This is better one to cc to linux-rdma.
> >
> > + Devesh, Selvin.
> >
> >> -----Original Message-----
> >> From: Parav Pandit
> >> Sent: Thursday, July 11, 2019 6:25 PM
> >> To: Yi Zhang <yi.zhang@redhat.com>; linux-nvme@lists.infradead.org
> >> Cc: Daniel Jurgens <danielj@mellanox.com>
> >> Subject: RE: regression: nvme rdma with bnxt_re0 broken
> >>
> >> Hi Yi Zhang,
> >>
> >>> -----Original Message-----
> >>> From: Yi Zhang <yi.zhang@redhat.com>
> >>> Sent: Thursday, July 11, 2019 3:17 PM
> >>> To: linux-nvme@lists.infradead.org
> >>> Cc: Daniel Jurgens <danielj@mellanox.com>; Parav Pandit
> >>> <parav@mellanox.com>
> >>> Subject: regression: nvme rdma with bnxt_re0 broken
> >>>
> >>> Hello
> >>>
> >>> 'nvme connect' failed when use bnxt_re0 on latest upstream build[1],
> >>> by bisecting I found it was introduced from v5.2.0-rc1 with [2], it
> >>> works after I revert it.
> >>> Let me know if you need more info, thanks.
> >>>
> >>> [1]
> >>> [root@rdma-perf-07 ~]$ nvme connect -t rdma -a 172.31.40.125 -s 4420
> >>> -n testnqn Failed to write to /dev/nvme-fabrics: Bad address
> >>>
> >>> [root@rdma-perf-07 ~]$ dmesg
> >>> [ 476.320742] bnxt_en 0000:19:00.0: QPLIB: cmdq[0x4b9]=0x15 status 0x5
Devesh, Selvin,
What does this error mean?
bnxt_qplib_create_ah() is failing.
> >>> [ 476.327103] infiniband bnxt_re0: Failed to allocate HW AH [
> >>> 476.332525] nvme nvme2: rdma_connect failed (-14).
> >>> [ 476.343552] nvme nvme2: rdma connection establishment failed
> >>> (-14)
> >>>
> >>> [root@rdma-perf-07 ~]$ lspci | grep -i Broadcom
> >>> 01:00.0 Ethernet controller: Broadcom Inc. and subsidiaries
> >>> NetXtreme
> >>> BCM5720 2-port Gigabit Ethernet PCIe
> >>> 01:00.1 Ethernet controller: Broadcom Inc. and subsidiaries
> >>> NetXtreme
> >>> BCM5720 2-port Gigabit Ethernet PCIe
> >>> 18:00.0 RAID bus controller: Broadcom / LSI MegaRAID SAS-3 3008
> >>> [Fury] (rev
> >>> 02)
> >>> 19:00.0 Ethernet controller: Broadcom Inc. and subsidiaries BCM57412
> >>> NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
> >>> 19:00.1 Ethernet controller: Broadcom Inc. and subsidiaries BCM57412
> >>> NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
> >>>
> >>>
> >>> [2]
> >>> commit 823b23da71132b80d9f41ab667c68b112455f3b6
> >>> Author: Parav Pandit <parav@mellanox.com>
> >>> Date: Wed Apr 10 11:23:03 2019 +0300
> >>>
> >>> IB/core: Allow vlan link local address based RoCE GIDs
> >>>
> >>> IPv6 link local address for a VLAN netdevice has nothing to do with its
> >>> resemblance with the default GID, because VLAN link local GID is in
> >>> different layer 2 domain.
> >>>
> >>> Now that RoCE MAD packet processing and route resolution consider
> the
> >>> right GID index, there is no need for an unnecessary check which
> prevents
> >>> the addition of vlan based IPv6 link local GIDs.
> >>>
> >>> Signed-off-by: Parav Pandit <parav@mellanox.com>
> >>> Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
> >>> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
> >>> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
> >>>
> >>>
> >>>
> >>> Best Regards,
> >>> Yi Zhang
> >>>
> >> I need some more information from you to debug this issue as I don’t
> >> have the hw.
> >> The highlighted patch added support for IPv6 link local address for
> >> vlan. I am unsure how this can affect IPv4 AH creation for which there is
> failure.
> >>
> >> 1. Before you assign the IP address to the netdevice, Please do, echo
> >> -n "module ib_core +p" > /sys/kernel/debug/dynamic_debug/control
> >>
> >> Please share below output before doing nvme connect.
> >> 2. Output of script [1]
> >> $ show_gids script
> >> If getting this script is problematic, share the output of,
> >>
> >> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gids/*
> >> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gid_attrs/ndevs/*
> >> $ ip link show
> >> $ip addr show
> >> $ dmesg
> >>
> >> [1] https://community.mellanox.com/s/article/understanding-show-gids-
> >> script#jive_content_id_The_Script
> >>
> >> I suspect that driver's assumption about GID indices might have gone
> >> wrong here in drivers/infiniband/hw/bnxt_re/ib_verbs.c.
> >> Lets see about results to confirm that.
> > _______________________________________________
> > Linux-nvme mailing list
> > Linux-nvme@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-nvme
^ permalink raw reply
* Re: regression: nvme rdma with bnxt_re0 broken
From: Yi Zhang @ 2019-07-12 1:53 UTC (permalink / raw)
To: Parav Pandit, linux-nvme@lists.infradead.org
Cc: Daniel Jurgens, linux-rdma@vger.kernel.org, Devesh Sharma,
selvin.xavier@broadcom.com
In-Reply-To: <AM0PR05MB4866070FBADCCABD1F84E42ED1F30@AM0PR05MB4866.eurprd05.prod.outlook.com>
Hi Parav
Here is the info, let me know if it's enough, thanks.
[root@rdma-perf-07 ~]$ echo -n "module ib_core +p" >
/sys/kernel/debug/dynamic_debug/control
[root@rdma-perf-07 ~]$ ifdown bnxt_roce
Device 'bnxt_roce' successfully disconnected.
[root@rdma-perf-07 ~]$ ifup bnxt_roce
Connection successfully activated (D-Bus active path:
/org/freedesktop/NetworkManager/ActiveConnection/16)
[root@rdma-perf-07 ~]$ sh a.sh
DEV PORT INDEX GID IPv4 VER DEV
--- ---- ----- --- ------------ --- ---
bnxt_re0 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
v1 bnxt_roce
bnxt_re0 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
v2 bnxt_roce
bnxt_re0 1 10 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
172.31.43.187 v1 bnxt_roce.43
bnxt_re0 1 11 0000:0000:0000:0000:0000:ffff:ac1f:2bbb
172.31.43.187 v2 bnxt_roce.43
bnxt_re0 1 2 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
v1 bnxt_roce.45
bnxt_re0 1 3 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
v2 bnxt_roce.45
bnxt_re0 1 4 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
v1 bnxt_roce.43
bnxt_re0 1 5 fe80:0000:0000:0000:020a:f7ff:fee3:6e32
v2 bnxt_roce.43
bnxt_re0 1 6 0000:0000:0000:0000:0000:ffff:ac1f:28bb
172.31.40.187 v1 bnxt_roce
bnxt_re0 1 7 0000:0000:0000:0000:0000:ffff:ac1f:28bb
172.31.40.187 v2 bnxt_roce
bnxt_re0 1 8 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
172.31.45.187 v1 bnxt_roce.45
bnxt_re0 1 9 0000:0000:0000:0000:0000:ffff:ac1f:2dbb
172.31.45.187 v2 bnxt_roce.45
bnxt_re1 1 0 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
v1 lom_2
bnxt_re1 1 1 fe80:0000:0000:0000:020a:f7ff:fee3:6e33
v2 lom_2
cxgb4_0 1 0 0007:433b:f5b0:0000:0000:0000:0000:0000 v1
cxgb4_0 2 0 0007:433b:f5b8:0000:0000:0000:0000:0000 v1
hfi1_0 1 0 fe80:0000:0000:0000:0011:7501:0109:6c60 v1
hfi1_0 1 1 fe80:0000:0000:0000:0006:6a00:0000:0005 v1
mlx5_0 1 0 fe80:0000:0000:0000:506b:4b03:00f3:8a38 v1
n_gids_found=19
[root@rdma-perf-07 ~]$ dmesg | tail -15
[ 19.744421] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8002: link
becomes ready
[ 19.758371] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8004: link
becomes ready
[ 20.010469] hfi1 0000:d8:00.0: hfi1_0: Switching to NO_DMA_RTAIL
[ 20.440580] IPv6: ADDRCONF(NETDEV_CHANGE): mlx5_ib0.8006: link
becomes ready
[ 21.098510] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
requested: 8. Max supported is 2.
[ 21.324341] bnxt_en 0000:19:00.0 bnxt_roce: Too many traffic classes
requested: 8. Max supported is 2.
[ 22.058647] IPv6: ADDRCONF(NETDEV_CHANGE): hfi1_opa0: link becomes ready
[ 211.407329] _ib_cache_gid_del: can't delete gid
fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22
[ 211.407334] _ib_cache_gid_del: can't delete gid
fe80:0000:0000:0000:020a:f7ff:fee3:6e32 error=-22
[ 211.425275] infiniband bnxt_re0: del_gid port=1 index=6 gid
0000:0000:0000:0000:0000:ffff:ac1f:28bb
[ 211.425280] infiniband bnxt_re0: free_gid_entry_locked port=1 index=6
gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
[ 211.425292] infiniband bnxt_re0: del_gid port=1 index=7 gid
0000:0000:0000:0000:0000:ffff:ac1f:28bb
[ 211.425461] infiniband bnxt_re0: free_gid_entry_locked port=1 index=7
gid 0000:0000:0000:0000:0000:ffff:ac1f:28bb
[ 225.474061] infiniband bnxt_re0: store_gid_entry port=1 index=6 gid
0000:0000:0000:0000:0000:ffff:ac1f:28bb
[ 225.474075] infiniband bnxt_re0: store_gid_entry port=1 index=7 gid
0000:0000:0000:0000:0000:ffff:ac1f:28bb
On 7/12/19 12:18 AM, Parav Pandit wrote:
> Sagi,
>
> This is better one to cc to linux-rdma.
>
> + Devesh, Selvin.
>
>> -----Original Message-----
>> From: Parav Pandit
>> Sent: Thursday, July 11, 2019 6:25 PM
>> To: Yi Zhang <yi.zhang@redhat.com>; linux-nvme@lists.infradead.org
>> Cc: Daniel Jurgens <danielj@mellanox.com>
>> Subject: RE: regression: nvme rdma with bnxt_re0 broken
>>
>> Hi Yi Zhang,
>>
>>> -----Original Message-----
>>> From: Yi Zhang <yi.zhang@redhat.com>
>>> Sent: Thursday, July 11, 2019 3:17 PM
>>> To: linux-nvme@lists.infradead.org
>>> Cc: Daniel Jurgens <danielj@mellanox.com>; Parav Pandit
>>> <parav@mellanox.com>
>>> Subject: regression: nvme rdma with bnxt_re0 broken
>>>
>>> Hello
>>>
>>> 'nvme connect' failed when use bnxt_re0 on latest upstream build[1],
>>> by bisecting I found it was introduced from v5.2.0-rc1 with [2], it
>>> works after I revert it.
>>> Let me know if you need more info, thanks.
>>>
>>> [1]
>>> [root@rdma-perf-07 ~]$ nvme connect -t rdma -a 172.31.40.125 -s 4420
>>> -n testnqn Failed to write to /dev/nvme-fabrics: Bad address
>>>
>>> [root@rdma-perf-07 ~]$ dmesg
>>> [ 476.320742] bnxt_en 0000:19:00.0: QPLIB: cmdq[0x4b9]=0x15 status
>>> 0x5 [ 476.327103] infiniband bnxt_re0: Failed to allocate HW AH [
>>> 476.332525] nvme nvme2: rdma_connect failed (-14).
>>> [ 476.343552] nvme nvme2: rdma connection establishment failed (-14)
>>>
>>> [root@rdma-perf-07 ~]$ lspci | grep -i Broadcom
>>> 01:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme
>>> BCM5720 2-port Gigabit Ethernet PCIe
>>> 01:00.1 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme
>>> BCM5720 2-port Gigabit Ethernet PCIe
>>> 18:00.0 RAID bus controller: Broadcom / LSI MegaRAID SAS-3 3008 [Fury]
>>> (rev
>>> 02)
>>> 19:00.0 Ethernet controller: Broadcom Inc. and subsidiaries BCM57412
>>> NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
>>> 19:00.1 Ethernet controller: Broadcom Inc. and subsidiaries BCM57412
>>> NetXtreme-E 10Gb RDMA Ethernet Controller (rev 01)
>>>
>>>
>>> [2]
>>> commit 823b23da71132b80d9f41ab667c68b112455f3b6
>>> Author: Parav Pandit <parav@mellanox.com>
>>> Date: Wed Apr 10 11:23:03 2019 +0300
>>>
>>> IB/core: Allow vlan link local address based RoCE GIDs
>>>
>>> IPv6 link local address for a VLAN netdevice has nothing to do with its
>>> resemblance with the default GID, because VLAN link local GID is in
>>> different layer 2 domain.
>>>
>>> Now that RoCE MAD packet processing and route resolution consider the
>>> right GID index, there is no need for an unnecessary check which prevents
>>> the addition of vlan based IPv6 link local GIDs.
>>>
>>> Signed-off-by: Parav Pandit <parav@mellanox.com>
>>> Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
>>> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
>>> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
>>>
>>>
>>>
>>> Best Regards,
>>> Yi Zhang
>>>
>> I need some more information from you to debug this issue as I don’t have the
>> hw.
>> The highlighted patch added support for IPv6 link local address for vlan. I am
>> unsure how this can affect IPv4 AH creation for which there is failure.
>>
>> 1. Before you assign the IP address to the netdevice, Please do, echo -n
>> "module ib_core +p" > /sys/kernel/debug/dynamic_debug/control
>>
>> Please share below output before doing nvme connect.
>> 2. Output of script [1]
>> $ show_gids script
>> If getting this script is problematic, share the output of,
>>
>> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gids/*
>> $ cat /sys/class/infiniband/bnxt_re0/ports/1/gid_attrs/ndevs/*
>> $ ip link show
>> $ip addr show
>> $ dmesg
>>
>> [1] https://community.mellanox.com/s/article/understanding-show-gids-
>> script#jive_content_id_The_Script
>>
>> I suspect that driver's assumption about GID indices might have gone wrong
>> here in drivers/infiniband/hw/bnxt_re/ib_verbs.c.
>> Lets see about results to confirm that.
> _______________________________________________
> Linux-nvme mailing list
> Linux-nvme@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-nvme
^ permalink raw reply
* Re: [PATCH v4 00/25] InfiniBand Transport (IBTRS) and Network Block Device (IBNBD)
From: Sagi Grimberg @ 2019-07-12 0:22 UTC (permalink / raw)
To: Danil Kipnis
Cc: Jack Wang, linux-block, linux-rdma, axboe, Christoph Hellwig,
bvanassche, jgg, dledford, Roman Pen, gregkh
In-Reply-To: <CAHg0HuxZvXH899=M4vC7BTH-bP2J35aTwsGhiGoC8AamD8gOyA@mail.gmail.com>
>> My main issues which were raised before are:
>> - IMO there isn't any justification to this ibtrs layering separation
>> given that the only user of this is your ibnbd. Unless you are
>> trying to submit another consumer, you should avoid adding another
>> subsystem that is not really general purpose.
> We designed ibtrs not only with the IBNBD in mind but also as the
> transport layer for a distributed SDS. We'd like to be able to do what
> ceph is capable of (automatic up/down scaling of the storage cluster,
> automatic recovery) but using in-kernel rdma-based IO transport
> drivers, thin-provisioned volume managers, etc. to keep the highest
> possible performance.
Sounds lovely, but still very much bound to your ibnbd. And that part
is not included in the patch set, so I still don't see why should this
be considered as a "generic" transport subsystem (it clearly isn't).
> All in all itbrs is a library to establish a "fat", multipath,
> autoreconnectable connection between two hosts on top of rdma,
> optimized for transport of IO traffic.
That is also dictating a wire-protocol which makes it useless to pretty
much any other consumer. Personally, I don't see how this library
would ever be used outside of your ibnbd.
>> - ibtrs in general is using almost no infrastructure from the existing
>> kernel subsystems. Examples are:
>> - tag allocation mechanism (which I'm not clear why its needed)
> As you correctly noticed our client manages the buffers allocated and
> registered by the server on the connection establishment. Our tags are
> just a mechanism to take and release those buffers for incoming
> requests on client side. Since the buffers allocated by the server are
> to be shared between all the devices mapped from that server and all
> their HW queues (each having num_cpus of them) the mechanism behind
> get_tag/put_tag also takes care of the fairness.
We have infrastructure for this, sbitmaps.
>> - rdma rw abstraction similar to what we have in the core
> On the one hand we have only single IO related function:
> ibtrs_clt_request(READ/WRITE, session,...), which executes rdma write
> with imm, or requests an rdma write with imm to be executed by the
> server.
For sure you can enhance the rw API to have imm support?
> On the other hand we provide an abstraction to establish and
> manage what we call "session", which consist of multiple paths (to do
> failover and multipath with different policies), where each path
> consists of num_cpu rdma connections.
That's fine, but it doesn't mean that it also needs to re-write
infrastructure that we already have.
> Once you established a session
> you can add or remove paths from it on the fly. In case the connection
> to server is lost, the client does periodic attempts to reconnect
> automatically. On the server side you get just sg-lists with a
> direction READ or WRITE as requested by the client. We designed this
> interface not only as the minimum required to build a block device on
> top of rdma but also with a distributed raid in mind.
I suggest you take a look at the rw API and use that in your transport.
>> Another question, from what I understand from the code, the client
>> always rdma_writes data on writes (with imm) from a remote pool of
>> server buffers dedicated to it. Essentially all writes are immediate (no
>> rdma reads ever). How is that different than using send wrs to a set of
>> pre-posted recv buffers (like all others are doing)? Is it faster?
> At the very beginning of the project we did some measurements and saw,
> that it is faster. I'm not sure if this is still true
Its not significantly faster (can't imagine why it would be).
What could make a difference is probably the fact that you never
do rdma reads for I/O writes which might be better. Also perhaps the
fact that you normally don't wait for send completions before completing
I/O (which is broken), and the fact that you batch recv operations.
I would be interested to understand what indeed makes ibnbd run faster
though.
>> Also, given that the server pre-allocate a substantial amount of memory
>> for each connection, is it documented the requirements from the server
>> side? Usually kernel implementations (especially upstream ones) will
>> avoid imposing such large longstanding memory requirements on the system
>> by default. I don't have a firm stand on this, but wanted to highlight
>> this as you are sending this for upstream inclusion.
> We definitely need to stress that somewhere. Will include into readme
> and add to the cover letter next time. Our memory management is indeed
> basically absent in favor of performance: The server reserves
> queue_depth of say 512K buffers. Each buffer is used by client for
> single IO only, no matter how big the request is. So if client only
> issues 4K IOs, we do waste 508*queue_depth K of memory. We were aiming
> for lowest possible latency from the beginning. It is probably
> possible to implement some clever allocator on the server side which
> wouldn't affect the performance a lot.
Or you can fallback to rdma_read like the rest of the ulps.
^ permalink raw reply
* Re: [rdma-core patch] srp_daemon: improve the debug message for is_enabled_by_rules_file
From: Bart Van Assche @ 2019-07-11 18:29 UTC (permalink / raw)
To: Honggang Li; +Cc: linux-rdma
In-Reply-To: <20190711024001.14648-1-honli@redhat.com>
On 7/10/19 7:40 PM, Honggang Li wrote:
> Signed-off-by: Honggang Li <honli@redhat.com>
> ---
> srp_daemon/srp_daemon.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/srp_daemon/srp_daemon.c b/srp_daemon/srp_daemon.c
> index a004f6a4..f27dd569 100644
> --- a/srp_daemon/srp_daemon.c
> +++ b/srp_daemon/srp_daemon.c
> @@ -349,10 +349,11 @@ static int is_enabled_by_rules_file(struct target_details *target)
> int rule;
> struct config_t *conf = config;
>
> - if (NULL == conf->rules)
> + if (NULL == conf->rules) {
> + pr_debug("SRP target with id_ext %s allowed by rules file\n", target->id_ext);
> return 1;
> + }
How about changing that message into e.g. "Allowing SRP target with
id_ext %s because not using a rules file"?
> + pr_debug("SRP target with id_ext %s %s by rules file\n",
> + target->id_ext,
> + conf->rules[rule].allow == 1 ? "allowed" : "disallowed");
> return conf->rules[rule].allow;
Is the "== 1" part necessary?
Otherwise this patch looks good to me.
Thanks,
Bart.
^ permalink raw reply
* Re: [PATCH] RDMA/siw: Mark expected switch fall-throughs
From: Jason Gunthorpe @ 2019-07-11 18:05 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Bernard Metzler, Doug Ledford, linux-rdma, linux-kernel
In-Reply-To: <20190711161218.GA4989@embeddedor>
On Thu, Jul 11, 2019 at 11:12:18AM -0500, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
>
> This patch fixes the following warnings:
>
> drivers/infiniband/sw/siw/siw_qp_rx.c: In function ‘siw_rdmap_complete’:
> drivers/infiniband/sw/siw/siw_qp_rx.c:1214:18: warning: this statement may fall through [-Wimplicit-fallthrough=]
> wqe->rqe.flags |= SIW_WQE_SOLICITED;
> ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
> drivers/infiniband/sw/siw/siw_qp_rx.c:1215:2: note: here
> case RDMAP_SEND:
> ^~~~
>
> drivers/infiniband/sw/siw/siw_qp_tx.c: In function ‘siw_qp_sq_process’:
> drivers/infiniband/sw/siw/siw_qp_tx.c:1044:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
> siw_wqe_put_mem(wqe, tx_type);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/infiniband/sw/siw/siw_qp_tx.c:1045:3: note: here
> case SIW_OP_INVAL_STAG:
> ^~~~
> drivers/infiniband/sw/siw/siw_qp_tx.c:1128:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
> siw_wqe_put_mem(wqe, tx_type);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/infiniband/sw/siw/siw_qp_tx.c:1129:3: note: here
> case SIW_OP_INVAL_STAG:
> ^~~~
>
> Warning level 3 was used: -Wimplicit-fallthrough=3
>
> This patch is part of the ongoing efforts to enable
> -Wimplicit-fallthrough.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>
> NOTE: -Wimplicit-fallthrough will be enabled globally in v5.3. So, I
> suggest you to take this patch for 5.3-rc1.
Okay, I queued this for the current merge window then
Jason
^ permalink raw reply
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