* Re: [PATCH 3/5] nvme: mark nvme_max_retries static
From: Johannes Thumshirn @ 2017-04-05 14:44 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Keith Busch, Sagi Grimberg, linux-nvme, linux-block,
linux-scsi
In-Reply-To: <20170405141856.1862-4-hch@lst.de>
On Wed, Apr 05, 2017 at 04:18:54PM +0200, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N�rnberg
GF: Felix Imend�rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N�rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply
* Re: [PATCH 4/5] nvme: move the retries count to struct nvme_request
From: Johannes Thumshirn @ 2017-04-05 14:45 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Keith Busch, Sagi Grimberg, linux-nvme, linux-block,
linux-scsi
In-Reply-To: <20170405141856.1862-5-hch@lst.de>
On Wed, Apr 05, 2017 at 04:18:55PM +0200, Christoph Hellwig wrote:
> The way NVMe uses this field is entirely different from the older
> SCSI/BLOCK_PC usage, so move it into struct nvme_request.
>
> Also reduce the size of the file to a unsigned char so that we leave space
> for additional smaller fields that will appear soon.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N�rnberg
GF: Felix Imend�rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N�rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply
* Re: [PATCH 5/5] block, scsi: move the retries field to struct scsi_request
From: Johannes Thumshirn @ 2017-04-05 14:46 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Keith Busch, Sagi Grimberg, linux-nvme, linux-block,
linux-scsi
In-Reply-To: <20170405141856.1862-6-hch@lst.de>
On Wed, Apr 05, 2017 at 04:18:56PM +0200, Christoph Hellwig wrote:
> Instead of bloating the generic struct request with it.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N�rnberg
GF: Felix Imend�rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N�rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply
* Re: [PATCH 1/5] nvme: move ->retries setup to nvme_setup_cmd
From: Christoph Hellwig @ 2017-04-05 14:50 UTC (permalink / raw)
To: Johannes Thumshirn
Cc: Christoph Hellwig, Jens Axboe, Keith Busch, Sagi Grimberg,
linux-nvme, linux-block, linux-scsi
In-Reply-To: <20170405144334.GO3941@linux-x5ow.site>
On Wed, Apr 05, 2017 at 04:43:34PM +0200, Johannes Thumshirn wrote:
> On Wed, Apr 05, 2017 at 04:18:52PM +0200, Christoph Hellwig wrote:
> > This way we get the behavior right for the non-PCIe transports.
>
> Could you please share a bit of your minds inner workings for us mere mortals?
It's initialized to zero the first time the command is submitted
and will then be incremented when queueing a retry.
^ permalink raw reply
* Re: always use REQ_OP_WRITE_ZEROES for zeroing offload V2
From: Christoph Hellwig @ 2017-04-05 14:51 UTC (permalink / raw)
To: axboe, martin.petersen, agk, snitzer, shli, philipp.reisner,
lars.ellenberg
Cc: linux-block, linux-scsi, drbd-dev, dm-devel, linux-raid
In-Reply-To: <20170405142205.6477-1-hch@lst.de>
Looks like the mail server crapped out under the load..
I'll resend tomorrow morning, in the meantime the git url below
works.
On Wed, Apr 05, 2017 at 04:21:38PM +0200, Christoph Hellwig wrote:
> This series makes REQ_OP_WRITE_ZEROES the only zeroing offload
> supported by the block layer, and switches existing implementations
> of REQ_OP_DISCARD that correctly set discard_zeroes_data to it,
> removes incorrect discard_zeroes_data, and also switches WRITE SAME
> based zeroing in SCSI to this new method.
>
> The series is against the block for-next tree.
>
> A git tree is also avaiable at:
>
> git://git.infradead.org/users/hch/block.git discard-rework.2
>
> Gitweb:
>
> http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/discard-rework.2
>
> Changes since V2:
> - various spelling fixes
> - various reviews captured
> - two new patches from Martin at the end
---end quoted text---
^ permalink raw reply
* Re: [PATCH 4/5] nvme: move the retries count to struct nvme_request
From: Keith Busch @ 2017-04-05 15:14 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jens Axboe, Sagi Grimberg, linux-nvme, linux-block, linux-scsi
In-Reply-To: <20170405141856.1862-5-hch@lst.de>
On Wed, Apr 05, 2017 at 04:18:55PM +0200, Christoph Hellwig wrote:
> The way NVMe uses this field is entirely different from the older
> SCSI/BLOCK_PC usage, so move it into struct nvme_request.
>
> Also reduce the size of the file to a unsigned char so that we leave space
> for additional smaller fields that will appear soon.
What new fields can we expect? Why temporarily pad the middle of the
struct instead of appending to the end? The "result" packed nicely
on 64-bit, at least.
> struct nvme_request {
> struct nvme_command *cmd;
> + u8 retries;
> union nvme_result result;
> };
^ permalink raw reply
* Re: [PATCH 4/5] nvme: move the retries count to struct nvme_request
From: Christoph Hellwig @ 2017-04-05 15:25 UTC (permalink / raw)
To: Keith Busch
Cc: Christoph Hellwig, Jens Axboe, Sagi Grimberg, linux-nvme,
linux-block, linux-scsi
In-Reply-To: <20170405151430.GS20181@localhost.localdomain>
On Wed, Apr 05, 2017 at 11:14:30AM -0400, Keith Busch wrote:
> On Wed, Apr 05, 2017 at 04:18:55PM +0200, Christoph Hellwig wrote:
> > The way NVMe uses this field is entirely different from the older
> > SCSI/BLOCK_PC usage, so move it into struct nvme_request.
> >
> > Also reduce the size of the file to a unsigned char so that we leave space
> > for additional smaller fields that will appear soon.
>
> What new fields can we expect? Why temporarily pad the middle of the
> struct instead of appending to the end? The "result" packed nicely
> on 64-bit, at least.
I've got another u8 and a u16 in pending patches. That being said
moving it to the end might make sense.
^ permalink raw reply
* Re: [PATCH] blk-mq: Remove blk_mq_queue_data.list
From: Bart Van Assche @ 2017-04-05 15:27 UTC (permalink / raw)
To: axboe@kernel.dk; +Cc: linux-block@vger.kernel.org
In-Reply-To: <20170405140722.GA20495@kernel.dk>
On Wed, 2017-04-05 at 08:07 -0600, Jens Axboe wrote:
> On Mon, Apr 03 2017, Bart Van Assche wrote:
> > The block layer core sets blk_mq_queue_data.list but no block
> > drivers read that member. Hence remove it and also the code that
> > is used to set this member.
>=20
> Looks fine to me, might as well kill it. Your patch came through mangled
> here though, on both my private and corporate email account. Did
> something change with the setup at your end? Would be great if you could
> resend it.
Hello Jens,
Sorry that the patch came through mangled. I send patch series with git
format-patch + git send-email. This patch was sent using git format-patch +
xclip + Thunderbird with the Toggle Word Wrap add-on configured not to wrap
long lines. This morning I tried to run git am on the copy of this patch
that I downloaded from my personal e-mail account and that worked fine.
Anyway, I will resend this patch with git send-email.
Bart.=
^ permalink raw reply
* [PATCH, RESEND] blk-mq: Remove blk_mq_queue_data.list
From: Bart Van Assche @ 2017-04-05 15:39 UTC (permalink / raw)
To: Jens Axboe; +Cc: linux-block, Bart Van Assche
The block layer core sets blk_mq_queue_data.list but no block
drivers read that member. Hence remove it and also the code that
is used to set this member.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
---
block/blk-mq.c | 17 -----------------
include/linux/blk-mq.h | 1 -
2 files changed, 18 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 061fc2cc88d3..f7cd3208bcdf 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -984,17 +984,9 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list)
{
struct request_queue *q = hctx->queue;
struct request *rq;
- LIST_HEAD(driver_list);
- struct list_head *dptr;
int errors, queued, ret = BLK_MQ_RQ_QUEUE_OK;
/*
- * Start off with dptr being NULL, so we start the first request
- * immediately, even if we have more pending.
- */
- dptr = NULL;
-
- /*
* Now process all the entries, sending them to the driver.
*/
errors = queued = 0;
@@ -1026,7 +1018,6 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list)
list_del_init(&rq->queuelist);
bd.rq = rq;
- bd.list = dptr;
/*
* Flag last if we have no more requests, or if we have more
@@ -1062,13 +1053,6 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list)
if (ret == BLK_MQ_RQ_QUEUE_BUSY)
break;
-
- /*
- * We've done the first request. If we have more than 1
- * left in the list, set dptr to defer issue.
- */
- if (!dptr && list->next != list->prev)
- dptr = &driver_list;
}
hctx->dispatched[queued_to_index(queued)]++;
@@ -1451,7 +1435,6 @@ static void __blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie,
struct request_queue *q = rq->q;
struct blk_mq_queue_data bd = {
.rq = rq,
- .list = NULL,
.last = 1
};
struct blk_mq_hw_ctx *hctx;
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index ea2e9dcd3aef..bdea90d75274 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -81,7 +81,6 @@ struct blk_mq_tag_set {
struct blk_mq_queue_data {
struct request *rq;
- struct list_head *list;
bool last;
};
--
2.12.0
^ permalink raw reply related
* Re: [PATCH, RESEND] blk-mq: Remove blk_mq_queue_data.list
From: Jens Axboe @ 2017-04-05 15:40 UTC (permalink / raw)
To: Bart Van Assche; +Cc: linux-block
In-Reply-To: <20170405153918.22350-1-bart.vanassche@sandisk.com>
On 04/05/2017 09:39 AM, Bart Van Assche wrote:
> The block layer core sets blk_mq_queue_data.list but no block
> drivers read that member. Hence remove it and also the code that
> is used to set this member.
Thanks, this came through fine. Applied for 4.12.
--
Jens Axboe
^ permalink raw reply
* Re: [PATCH] remove the obsolete hd driver
From: Martin K. Petersen @ 2017-04-05 15:46 UTC (permalink / raw)
To: Christoph Hellwig; +Cc: axboe, linux-block, linux-kernel
In-Reply-To: <20170405135923.953-1-hch@lst.de>
Christoph Hellwig <hch@lst.de> writes:
> This driver is for pre-IDE hardisk that are only found in PC from the
> stoneage of personal computing, and which we don't support elsewhere
> in the kernel these days.
>
> It's also been marked broken forever.
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
--
Martin K. Petersen Oracle Linux Engineering
^ permalink raw reply
* Re: [PATCH] remove the obsolete hd driver
From: Jens Axboe @ 2017-04-05 15:51 UTC (permalink / raw)
To: Christoph Hellwig; +Cc: linux-block, linux-kernel
In-Reply-To: <20170405135923.953-1-hch@lst.de>
On 04/05/2017 07:59 AM, Christoph Hellwig wrote:
> This driver is for pre-IDE hardisk that are only found in PC from the
> stoneage of personal computing, and which we don't support elsewhere
> in the kernel these days.
>
> It's also been marked broken forever.
Applied for 4.12, who'd trust their data to a driver written by Linus
anyway. Good riddance.
--
Jens Axboe
^ permalink raw reply
* ->retries fixups V2
From: Christoph Hellwig @ 2017-04-05 17:18 UTC (permalink / raw)
To: Jens Axboe, Keith Busch, Sagi Grimberg
Cc: linux-nvme, linux-block, linux-scsi
This series fixes a few lose bits in terms of how nvme uses ->retries,
including fixing it for non-PCIe transports. While at it I noticed that
nvme and scsi use the field in entirely different ways, and no other
driver uses it at all. So I decided to move it into the nvme_request and
scsi_request structures instead.
Changes since V1:
- better changelog for one patch
- move the new retries field to the end of struct nvme_request
^ permalink raw reply
* [PATCH 1/5] nvme: move ->retries setup to nvme_setup_cmd
From: Christoph Hellwig @ 2017-04-05 17:18 UTC (permalink / raw)
To: Jens Axboe, Keith Busch, Sagi Grimberg
Cc: linux-nvme, linux-block, linux-scsi
In-Reply-To: <20170405171812.19911-1-hch@lst.de>
->retries is counting the number of times a command is resubmitted, and
be cleared on the first time we see the command. We currently don't do
that for non-PCIe command, which is easily fixed by moving the setup
to common code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/nvme/host/core.c | 5 +++++
drivers/nvme/host/pci.c | 4 ----
2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 3c908e1bc903..0437f44d00f9 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -350,6 +350,11 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
{
int ret = BLK_MQ_RQ_QUEUE_OK;
+ if (!(req->rq_flags & RQF_DONTPREP)) {
+ req->retries = 0;
+ req->rq_flags |= RQF_DONTPREP;
+ }
+
switch (req_op(req)) {
case REQ_OP_DRV_IN:
case REQ_OP_DRV_OUT:
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 9e686a67d93b..3818ab15a26e 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -326,10 +326,6 @@ static int nvme_init_iod(struct request *rq, struct nvme_dev *dev)
iod->nents = 0;
iod->length = size;
- if (!(rq->rq_flags & RQF_DONTPREP)) {
- rq->retries = 0;
- rq->rq_flags |= RQF_DONTPREP;
- }
return BLK_MQ_RQ_QUEUE_OK;
}
--
2.11.0
^ permalink raw reply related
* [PATCH 2/5] nvme: cleanup nvme_req_needs_retry
From: Christoph Hellwig @ 2017-04-05 17:18 UTC (permalink / raw)
To: Jens Axboe, Keith Busch, Sagi Grimberg
Cc: linux-nvme, linux-block, linux-scsi
In-Reply-To: <20170405171812.19911-1-hch@lst.de>
Don't pass the status explicitly but derive it from the requeust,
and unwind the complex condition to be more readable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/nvme/host/core.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 0437f44d00f9..b225aacf4b89 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -67,11 +67,17 @@ static DEFINE_SPINLOCK(dev_list_lock);
static struct class *nvme_class;
-static inline bool nvme_req_needs_retry(struct request *req, u16 status)
+static inline bool nvme_req_needs_retry(struct request *req)
{
- return !(status & NVME_SC_DNR || blk_noretry_request(req)) &&
- (jiffies - req->start_time) < req->timeout &&
- req->retries < nvme_max_retries;
+ if (blk_noretry_request(req))
+ return false;
+ if (req->errors & NVME_SC_DNR)
+ return false;
+ if (jiffies - req->start_time >= req->timeout)
+ return false;
+ if (req->retries >= nvme_max_retries)
+ return false;
+ return true;
}
void nvme_complete_rq(struct request *req)
@@ -79,7 +85,7 @@ void nvme_complete_rq(struct request *req)
int error = 0;
if (unlikely(req->errors)) {
- if (nvme_req_needs_retry(req, req->errors)) {
+ if (nvme_req_needs_retry(req)) {
req->retries++;
blk_mq_requeue_request(req,
!blk_mq_queue_stopped(req->q));
--
2.11.0
^ permalink raw reply related
* [PATCH 3/5] nvme: mark nvme_max_retries static
From: Christoph Hellwig @ 2017-04-05 17:18 UTC (permalink / raw)
To: Jens Axboe, Keith Busch, Sagi Grimberg
Cc: linux-nvme, linux-block, linux-scsi
In-Reply-To: <20170405171812.19911-1-hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/nvme/host/core.c | 3 +--
drivers/nvme/host/nvme.h | 2 --
2 files changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index b225aacf4b89..933e67c60e33 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -49,10 +49,9 @@ unsigned char shutdown_timeout = 5;
module_param(shutdown_timeout, byte, 0644);
MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown");
-unsigned int nvme_max_retries = 5;
+static unsigned int nvme_max_retries = 5;
module_param_named(max_retries, nvme_max_retries, uint, 0644);
MODULE_PARM_DESC(max_retries, "max number of retries a command may have");
-EXPORT_SYMBOL_GPL(nvme_max_retries);
static int nvme_char_major;
module_param(nvme_char_major, int, 0);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 227f281482db..82ba9a305301 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -43,8 +43,6 @@ extern unsigned char shutdown_timeout;
#define NVME_DEFAULT_KATO 5
#define NVME_KATO_GRACE 10
-extern unsigned int nvme_max_retries;
-
enum {
NVME_NS_LBA = 0,
NVME_NS_LIGHTNVM = 1,
--
2.11.0
^ permalink raw reply related
* [PATCH 4/5] nvme: move the retries count to struct nvme_request
From: Christoph Hellwig @ 2017-04-05 17:18 UTC (permalink / raw)
To: Jens Axboe, Keith Busch, Sagi Grimberg
Cc: linux-nvme, linux-block, linux-scsi
In-Reply-To: <20170405171812.19911-1-hch@lst.de>
The way NVMe uses this field is entirely different from the older
SCSI/BLOCK_PC usage, so move it into struct nvme_request.
Also reduce the size of the file to a unsigned char so that we leave
space for additional smaller fields that will appear soon.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/nvme/host/core.c | 10 +++++-----
drivers/nvme/host/nvme.h | 1 +
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 933e67c60e33..dc05f41c3992 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -49,8 +49,8 @@ unsigned char shutdown_timeout = 5;
module_param(shutdown_timeout, byte, 0644);
MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown");
-static unsigned int nvme_max_retries = 5;
-module_param_named(max_retries, nvme_max_retries, uint, 0644);
+static u8 nvme_max_retries = 5;
+module_param_named(max_retries, nvme_max_retries, byte, 0644);
MODULE_PARM_DESC(max_retries, "max number of retries a command may have");
static int nvme_char_major;
@@ -74,7 +74,7 @@ static inline bool nvme_req_needs_retry(struct request *req)
return false;
if (jiffies - req->start_time >= req->timeout)
return false;
- if (req->retries >= nvme_max_retries)
+ if (nvme_req(req)->retries >= nvme_max_retries)
return false;
return true;
}
@@ -85,7 +85,7 @@ void nvme_complete_rq(struct request *req)
if (unlikely(req->errors)) {
if (nvme_req_needs_retry(req)) {
- req->retries++;
+ nvme_req(req)->retries++;
blk_mq_requeue_request(req,
!blk_mq_queue_stopped(req->q));
return;
@@ -356,7 +356,7 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
int ret = BLK_MQ_RQ_QUEUE_OK;
if (!(req->rq_flags & RQF_DONTPREP)) {
- req->retries = 0;
+ nvme_req(req)->retries = 0;
req->rq_flags |= RQF_DONTPREP;
}
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 82ba9a305301..9eecb67177df 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -90,6 +90,7 @@ enum nvme_quirks {
struct nvme_request {
struct nvme_command *cmd;
union nvme_result result;
+ u8 retries;
};
static inline struct nvme_request *nvme_req(struct request *req)
--
2.11.0
^ permalink raw reply related
* [PATCH 5/5] block, scsi: move the retries field to struct scsi_request
From: Christoph Hellwig @ 2017-04-05 17:18 UTC (permalink / raw)
To: Jens Axboe, Keith Busch, Sagi Grimberg
Cc: linux-nvme, linux-block, linux-scsi
In-Reply-To: <20170405171812.19911-1-hch@lst.de>
Instead of bloating the generic struct request with it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
---
block/scsi_ioctl.c | 8 ++++----
drivers/scsi/osd/osd_initiator.c | 2 +-
drivers/scsi/osst.c | 2 +-
drivers/scsi/scsi_error.c | 2 +-
drivers/scsi/scsi_lib.c | 4 ++--
drivers/scsi/sg.c | 2 +-
drivers/scsi/st.c | 2 +-
drivers/target/target_core_pscsi.c | 2 +-
include/linux/blkdev.h | 1 -
include/scsi/scsi_request.h | 1 +
10 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 2a2fc768b27a..82a43bb19967 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -362,7 +362,7 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
goto out_free_cdb;
bio = rq->bio;
- rq->retries = 0;
+ req->retries = 0;
start_time = jiffies;
@@ -476,13 +476,13 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
goto error;
/* default. possible overriden later */
- rq->retries = 5;
+ req->retries = 5;
switch (opcode) {
case SEND_DIAGNOSTIC:
case FORMAT_UNIT:
rq->timeout = FORMAT_UNIT_TIMEOUT;
- rq->retries = 1;
+ req->retries = 1;
break;
case START_STOP:
rq->timeout = START_STOP_TIMEOUT;
@@ -495,7 +495,7 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
break;
case READ_DEFECT_DATA:
rq->timeout = READ_DEFECT_DATA_TIMEOUT;
- rq->retries = 1;
+ req->retries = 1;
break;
default:
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 6903f03c88af..9d0727b2bdec 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -1602,7 +1602,7 @@ static int _init_blk_request(struct osd_request *or,
req->rq_flags |= RQF_QUIET;
req->timeout = or->timeout;
- req->retries = or->retries;
+ scsi_req(req)->retries = or->retries;
if (has_out) {
or->out.req = req;
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index c47f4b349bac..41bc1d64bf86 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -414,7 +414,7 @@ static int osst_execute(struct osst_request *SRpnt, const unsigned char *cmd,
memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
memcpy(rq->cmd, cmd, rq->cmd_len);
req->timeout = timeout;
- req->retries = retries;
+ rq->retries = retries;
req->end_io_data = SRpnt;
blk_execute_rq_nowait(req->q, NULL, req, 1, osst_end_async);
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index f2cafae150bc..2db412dd4b44 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1988,7 +1988,7 @@ static void scsi_eh_lock_door(struct scsi_device *sdev)
req->rq_flags |= RQF_QUIET;
req->timeout = 10 * HZ;
- req->retries = 5;
+ rq->retries = 5;
blk_execute_rq_nowait(req->q, NULL, req, 1, eh_lock_door_done);
}
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index c1519660824b..11972d1075f1 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -256,7 +256,7 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
rq->cmd_len = COMMAND_SIZE(cmd[0]);
memcpy(rq->cmd, cmd, rq->cmd_len);
- req->retries = retries;
+ rq->retries = retries;
req->timeout = timeout;
req->cmd_flags |= flags;
req->rq_flags |= rq_flags | RQF_QUIET | RQF_PREEMPT;
@@ -1177,7 +1177,7 @@ static int scsi_setup_scsi_cmnd(struct scsi_device *sdev, struct request *req)
cmd->cmd_len = scsi_req(req)->cmd_len;
cmd->cmnd = scsi_req(req)->cmd;
cmd->transfersize = blk_rq_bytes(req);
- cmd->allowed = req->retries;
+ cmd->allowed = scsi_req(req)->retries;
return BLKPREP_OK;
}
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 225abaad4d1c..c5aaceea8d77 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1718,7 +1718,7 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
srp->rq = rq;
rq->end_io_data = srp;
- rq->retries = SG_DEFAULT_RETRIES;
+ req->retries = SG_DEFAULT_RETRIES;
if ((dxfer_len <= 0) || (dxfer_dir == SG_DXFER_NONE))
return 0;
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index e5ef78a6848e..5408643431bb 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -579,7 +579,7 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
memset(rq->cmd, 0, BLK_MAX_CDB);
memcpy(rq->cmd, cmd, rq->cmd_len);
req->timeout = timeout;
- req->retries = retries;
+ rq->retries = retries;
req->end_io_data = SRpnt;
blk_execute_rq_nowait(req->q, NULL, req, 1, st_scsi_execute_end);
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 94cda7991e80..c7fa372c527a 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -1008,7 +1008,7 @@ pscsi_execute_cmd(struct se_cmd *cmd)
req->timeout = PS_TIMEOUT_DISK;
else
req->timeout = PS_TIMEOUT_OTHER;
- req->retries = PS_RETRY;
+ scsi_req(req)->retries = PS_RETRY;
blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req,
(cmd->sam_task_attr == TCM_HEAD_TAG),
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a2dc6b390d48..ce6f9a6534c9 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -224,7 +224,6 @@ struct request {
unsigned long deadline;
struct list_head timeout_list;
unsigned int timeout;
- int retries;
/*
* completion callback.
diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h
index ba0aeb980f7e..7c583a0f363a 100644
--- a/include/scsi/scsi_request.h
+++ b/include/scsi/scsi_request.h
@@ -11,6 +11,7 @@ struct scsi_request {
unsigned short cmd_len;
unsigned int sense_len;
unsigned int resid_len; /* residual count */
+ int retries;
void *sense;
};
--
2.11.0
^ permalink raw reply related
* always use REQ_OP_WRITE_ZEROES for zeroing offload V2
From: Christoph Hellwig @ 2017-04-05 17:20 UTC (permalink / raw)
To: axboe, martin.petersen, agk, snitzer, shli, philipp.reisner,
lars.ellenberg
Cc: linux-block, linux-scsi, drbd-dev, dm-devel, linux-raid
This series makes REQ_OP_WRITE_ZEROES the only zeroing offload
supported by the block layer, and switches existing implementations
of REQ_OP_DISCARD that correctly set discard_zeroes_data to it,
removes incorrect discard_zeroes_data, and also switches WRITE SAME
based zeroing in SCSI to this new method.
The series is against the block for-next tree.
A git tree is also avaiable at:
git://git.infradead.org/users/hch/block.git discard-rework.2
Gitweb:
http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/discard-rework.2
Changes since V2:
- various spelling fixes
- various reviews captured
- two new patches from Martin at the end
^ permalink raw reply
* [PATCH 01/27] sd: split sd_setup_discard_cmnd
From: Christoph Hellwig @ 2017-04-05 17:20 UTC (permalink / raw)
To: axboe, martin.petersen, agk, snitzer, shli, philipp.reisner,
lars.ellenberg
Cc: linux-block, linux-scsi, drbd-dev, dm-devel, linux-raid
In-Reply-To: <20170405172125.22600-1-hch@lst.de>
Split sd_setup_discard_cmnd into one function per provisioning type. While
this creates some very slight duplication of boilerplate code it keeps the
code modular for additions of new provisioning types, and for reusing the
write same functions for the upcoming scsi implementation of the Write Zeroes
operation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
drivers/scsi/sd.c | 153 ++++++++++++++++++++++++++++++------------------------
1 file changed, 84 insertions(+), 69 deletions(-)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index fcfeddc79331..b853f91fb3da 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -701,93 +701,97 @@ static void sd_config_discard(struct scsi_disk *sdkp, unsigned int mode)
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
}
-/**
- * sd_setup_discard_cmnd - unmap blocks on thinly provisioned device
- * @sdp: scsi device to operate on
- * @rq: Request to prepare
- *
- * Will issue either UNMAP or WRITE SAME(16) depending on preference
- * indicated by target device.
- **/
-static int sd_setup_discard_cmnd(struct scsi_cmnd *cmd)
+static int sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
{
- struct request *rq = cmd->request;
struct scsi_device *sdp = cmd->device;
- struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
- sector_t sector = blk_rq_pos(rq);
- unsigned int nr_sectors = blk_rq_sectors(rq);
- unsigned int len;
- int ret;
+ struct request *rq = cmd->request;
+ u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
+ u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
+ unsigned int data_len = 24;
char *buf;
- struct page *page;
- sector >>= ilog2(sdp->sector_size) - 9;
- nr_sectors >>= ilog2(sdp->sector_size) - 9;
-
- page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
- if (!page)
+ rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
+ if (!rq->special_vec.bv_page)
return BLKPREP_DEFER;
+ rq->special_vec.bv_offset = 0;
+ rq->special_vec.bv_len = data_len;
+ rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
- switch (sdkp->provisioning_mode) {
- case SD_LBP_UNMAP:
- buf = page_address(page);
-
- cmd->cmd_len = 10;
- cmd->cmnd[0] = UNMAP;
- cmd->cmnd[8] = 24;
-
- put_unaligned_be16(6 + 16, &buf[0]);
- put_unaligned_be16(16, &buf[2]);
- put_unaligned_be64(sector, &buf[8]);
- put_unaligned_be32(nr_sectors, &buf[16]);
+ cmd->cmd_len = 10;
+ cmd->cmnd[0] = UNMAP;
+ cmd->cmnd[8] = 24;
- len = 24;
- break;
+ buf = page_address(rq->special_vec.bv_page);
+ put_unaligned_be16(6 + 16, &buf[0]);
+ put_unaligned_be16(16, &buf[2]);
+ put_unaligned_be64(sector, &buf[8]);
+ put_unaligned_be32(nr_sectors, &buf[16]);
- case SD_LBP_WS16:
- cmd->cmd_len = 16;
- cmd->cmnd[0] = WRITE_SAME_16;
- cmd->cmnd[1] = 0x8; /* UNMAP */
- put_unaligned_be64(sector, &cmd->cmnd[2]);
- put_unaligned_be32(nr_sectors, &cmd->cmnd[10]);
+ cmd->allowed = SD_MAX_RETRIES;
+ cmd->transfersize = data_len;
+ rq->timeout = SD_TIMEOUT;
+ scsi_req(rq)->resid_len = data_len;
- len = sdkp->device->sector_size;
- break;
+ return scsi_init_io(cmd);
+}
- case SD_LBP_WS10:
- case SD_LBP_ZERO:
- cmd->cmd_len = 10;
- cmd->cmnd[0] = WRITE_SAME;
- if (sdkp->provisioning_mode == SD_LBP_WS10)
- cmd->cmnd[1] = 0x8; /* UNMAP */
- put_unaligned_be32(sector, &cmd->cmnd[2]);
- put_unaligned_be16(nr_sectors, &cmd->cmnd[7]);
+static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd)
+{
+ struct scsi_device *sdp = cmd->device;
+ struct request *rq = cmd->request;
+ u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
+ u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
+ u32 data_len = sdp->sector_size;
- len = sdkp->device->sector_size;
- break;
+ rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
+ if (!rq->special_vec.bv_page)
+ return BLKPREP_DEFER;
+ rq->special_vec.bv_offset = 0;
+ rq->special_vec.bv_len = data_len;
+ rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
- default:
- ret = BLKPREP_INVALID;
- goto out;
- }
+ cmd->cmd_len = 16;
+ cmd->cmnd[0] = WRITE_SAME_16;
+ cmd->cmnd[1] = 0x8; /* UNMAP */
+ put_unaligned_be64(sector, &cmd->cmnd[2]);
+ put_unaligned_be32(nr_sectors, &cmd->cmnd[10]);
+ cmd->allowed = SD_MAX_RETRIES;
+ cmd->transfersize = data_len;
rq->timeout = SD_TIMEOUT;
+ scsi_req(rq)->resid_len = data_len;
- cmd->transfersize = len;
- cmd->allowed = SD_MAX_RETRIES;
+ return scsi_init_io(cmd);
+}
- rq->special_vec.bv_page = page;
- rq->special_vec.bv_offset = 0;
- rq->special_vec.bv_len = len;
+static int sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, bool unmap)
+{
+ struct scsi_device *sdp = cmd->device;
+ struct request *rq = cmd->request;
+ u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
+ u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
+ u32 data_len = sdp->sector_size;
+ rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
+ if (!rq->special_vec.bv_page)
+ return BLKPREP_DEFER;
+ rq->special_vec.bv_offset = 0;
+ rq->special_vec.bv_len = data_len;
rq->rq_flags |= RQF_SPECIAL_PAYLOAD;
- scsi_req(rq)->resid_len = len;
- ret = scsi_init_io(cmd);
-out:
- if (ret != BLKPREP_OK)
- __free_page(page);
- return ret;
+ cmd->cmd_len = 10;
+ cmd->cmnd[0] = WRITE_SAME;
+ if (unmap)
+ cmd->cmnd[1] = 0x8; /* UNMAP */
+ put_unaligned_be32(sector, &cmd->cmnd[2]);
+ put_unaligned_be16(nr_sectors, &cmd->cmnd[7]);
+
+ cmd->allowed = SD_MAX_RETRIES;
+ cmd->transfersize = data_len;
+ rq->timeout = SD_TIMEOUT;
+ scsi_req(rq)->resid_len = data_len;
+
+ return scsi_init_io(cmd);
}
static void sd_config_write_same(struct scsi_disk *sdkp)
@@ -1155,7 +1159,18 @@ static int sd_init_command(struct scsi_cmnd *cmd)
switch (req_op(rq)) {
case REQ_OP_DISCARD:
- return sd_setup_discard_cmnd(cmd);
+ switch (scsi_disk(rq->rq_disk)->provisioning_mode) {
+ case SD_LBP_UNMAP:
+ return sd_setup_unmap_cmnd(cmd);
+ case SD_LBP_WS16:
+ return sd_setup_write_same16_cmnd(cmd);
+ case SD_LBP_WS10:
+ return sd_setup_write_same10_cmnd(cmd, true);
+ case SD_LBP_ZERO:
+ return sd_setup_write_same10_cmnd(cmd, false);
+ default:
+ return BLKPREP_INVALID;
+ }
case REQ_OP_WRITE_SAME:
return sd_setup_write_same_cmnd(cmd);
case REQ_OP_FLUSH:
--
2.11.0
^ permalink raw reply related
* [PATCH 02/27] block: renumber REQ_OP_WRITE_ZEROES
From: Christoph Hellwig @ 2017-04-05 17:21 UTC (permalink / raw)
To: axboe, martin.petersen, agk, snitzer, shli, philipp.reisner,
lars.ellenberg
Cc: linux-block, linux-scsi, drbd-dev, dm-devel, linux-raid
In-Reply-To: <20170405172125.22600-1-hch@lst.de>
Make life easy for implementations that needs to send a data buffer
to the device (e.g. SCSI) by numbering it as a data out command.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
include/linux/blk_types.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 67bcf8a5326e..4eae30bfbfca 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -168,7 +168,7 @@ enum req_opf {
/* write the same sector many times */
REQ_OP_WRITE_SAME = 7,
/* write the zero filled sector many times */
- REQ_OP_WRITE_ZEROES = 8,
+ REQ_OP_WRITE_ZEROES = 9,
/* SCSI passthrough using struct scsi_request */
REQ_OP_SCSI_IN = 32,
--
2.11.0
^ permalink raw reply related
* [PATCH 03/27] block: implement splitting of REQ_OP_WRITE_ZEROES bios
From: Christoph Hellwig @ 2017-04-05 17:21 UTC (permalink / raw)
To: axboe, martin.petersen, agk, snitzer, shli, philipp.reisner,
lars.ellenberg
Cc: linux-block, linux-scsi, drbd-dev, dm-devel, linux-raid
In-Reply-To: <20170405172125.22600-1-hch@lst.de>
Copy and past the REQ_OP_WRITE_SAME code to prepare to implementations
that limit the write zeroes size.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
block/blk-merge.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 2afa262425d1..3990ae406341 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -54,6 +54,20 @@ static struct bio *blk_bio_discard_split(struct request_queue *q,
return bio_split(bio, split_sectors, GFP_NOIO, bs);
}
+static struct bio *blk_bio_write_zeroes_split(struct request_queue *q,
+ struct bio *bio, struct bio_set *bs, unsigned *nsegs)
+{
+ *nsegs = 1;
+
+ if (!q->limits.max_write_zeroes_sectors)
+ return NULL;
+
+ if (bio_sectors(bio) <= q->limits.max_write_zeroes_sectors)
+ return NULL;
+
+ return bio_split(bio, q->limits.max_write_zeroes_sectors, GFP_NOIO, bs);
+}
+
static struct bio *blk_bio_write_same_split(struct request_queue *q,
struct bio *bio,
struct bio_set *bs,
@@ -200,8 +214,7 @@ void blk_queue_split(struct request_queue *q, struct bio **bio,
split = blk_bio_discard_split(q, *bio, bs, &nsegs);
break;
case REQ_OP_WRITE_ZEROES:
- split = NULL;
- nsegs = (*bio)->bi_phys_segments;
+ split = blk_bio_write_zeroes_split(q, *bio, bs, &nsegs);
break;
case REQ_OP_WRITE_SAME:
split = blk_bio_write_same_split(q, *bio, bs, &nsegs);
--
2.11.0
^ permalink raw reply related
* [PATCH 04/27] sd: implement REQ_OP_WRITE_ZEROES
From: Christoph Hellwig @ 2017-04-05 17:21 UTC (permalink / raw)
To: axboe, martin.petersen, agk, snitzer, shli, philipp.reisner,
lars.ellenberg
Cc: linux-block, linux-scsi, drbd-dev, dm-devel, linux-raid
In-Reply-To: <20170405172125.22600-1-hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
drivers/scsi/sd.c | 31 ++++++++++++++++++++++++++-----
drivers/scsi/sd_zbc.c | 1 +
2 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index b853f91fb3da..d8d9c0bdd93c 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -735,7 +735,7 @@ static int sd_setup_unmap_cmnd(struct scsi_cmnd *cmd)
return scsi_init_io(cmd);
}
-static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd)
+static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, bool unmap)
{
struct scsi_device *sdp = cmd->device;
struct request *rq = cmd->request;
@@ -752,13 +752,14 @@ static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd)
cmd->cmd_len = 16;
cmd->cmnd[0] = WRITE_SAME_16;
- cmd->cmnd[1] = 0x8; /* UNMAP */
+ if (unmap)
+ cmd->cmnd[1] = 0x8; /* UNMAP */
put_unaligned_be64(sector, &cmd->cmnd[2]);
put_unaligned_be32(nr_sectors, &cmd->cmnd[10]);
cmd->allowed = SD_MAX_RETRIES;
cmd->transfersize = data_len;
- rq->timeout = SD_TIMEOUT;
+ rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
scsi_req(rq)->resid_len = data_len;
return scsi_init_io(cmd);
@@ -788,12 +789,27 @@ static int sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, bool unmap)
cmd->allowed = SD_MAX_RETRIES;
cmd->transfersize = data_len;
- rq->timeout = SD_TIMEOUT;
+ rq->timeout = unmap ? SD_TIMEOUT : SD_WRITE_SAME_TIMEOUT;
scsi_req(rq)->resid_len = data_len;
return scsi_init_io(cmd);
}
+static int sd_setup_write_zeroes_cmnd(struct scsi_cmnd *cmd)
+{
+ struct request *rq = cmd->request;
+ struct scsi_device *sdp = cmd->device;
+ struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
+ u64 sector = blk_rq_pos(rq) >> (ilog2(sdp->sector_size) - 9);
+ u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9);
+
+ if (sdp->no_write_same)
+ return BLKPREP_INVALID;
+ if (sdkp->ws16 || sector > 0xffffffff || nr_sectors > 0xffff)
+ return sd_setup_write_same16_cmnd(cmd, false);
+ return sd_setup_write_same10_cmnd(cmd, false);
+}
+
static void sd_config_write_same(struct scsi_disk *sdkp)
{
struct request_queue *q = sdkp->disk->queue;
@@ -823,6 +839,8 @@ static void sd_config_write_same(struct scsi_disk *sdkp)
out:
blk_queue_max_write_same_sectors(q, sdkp->max_ws_blocks *
(logical_block_size >> 9));
+ blk_queue_max_write_zeroes_sectors(q, sdkp->max_ws_blocks *
+ (logical_block_size >> 9));
}
/**
@@ -1163,7 +1181,7 @@ static int sd_init_command(struct scsi_cmnd *cmd)
case SD_LBP_UNMAP:
return sd_setup_unmap_cmnd(cmd);
case SD_LBP_WS16:
- return sd_setup_write_same16_cmnd(cmd);
+ return sd_setup_write_same16_cmnd(cmd, true);
case SD_LBP_WS10:
return sd_setup_write_same10_cmnd(cmd, true);
case SD_LBP_ZERO:
@@ -1171,6 +1189,8 @@ static int sd_init_command(struct scsi_cmnd *cmd)
default:
return BLKPREP_INVALID;
}
+ case REQ_OP_WRITE_ZEROES:
+ return sd_setup_write_zeroes_cmnd(cmd);
case REQ_OP_WRITE_SAME:
return sd_setup_write_same_cmnd(cmd);
case REQ_OP_FLUSH:
@@ -1810,6 +1830,7 @@ static int sd_done(struct scsi_cmnd *SCpnt)
switch (req_op(req)) {
case REQ_OP_DISCARD:
+ case REQ_OP_WRITE_ZEROES:
case REQ_OP_WRITE_SAME:
case REQ_OP_ZONE_RESET:
if (!result) {
diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c
index 92620c8ea8ad..1994f7799fce 100644
--- a/drivers/scsi/sd_zbc.c
+++ b/drivers/scsi/sd_zbc.c
@@ -329,6 +329,7 @@ void sd_zbc_complete(struct scsi_cmnd *cmd,
switch (req_op(rq)) {
case REQ_OP_WRITE:
+ case REQ_OP_WRITE_ZEROES:
case REQ_OP_WRITE_SAME:
case REQ_OP_ZONE_RESET:
--
2.11.0
^ permalink raw reply related
* [PATCH 05/27] md: support REQ_OP_WRITE_ZEROES
From: Christoph Hellwig @ 2017-04-05 17:21 UTC (permalink / raw)
To: axboe, martin.petersen, agk, snitzer, shli, philipp.reisner,
lars.ellenberg
Cc: linux-block, linux-scsi, drbd-dev, dm-devel, linux-raid
In-Reply-To: <20170405172125.22600-1-hch@lst.de>
Copy & paste from the REQ_OP_WRITE_SAME code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
drivers/md/linear.c | 1 +
drivers/md/md.h | 7 +++++++
drivers/md/multipath.c | 1 +
drivers/md/raid0.c | 2 ++
drivers/md/raid1.c | 4 +++-
drivers/md/raid10.c | 1 +
drivers/md/raid5.c | 1 +
7 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 3e38e0207a3e..377a8a3672e3 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -293,6 +293,7 @@ static void linear_make_request(struct mddev *mddev, struct bio *bio)
split, disk_devt(mddev->gendisk),
bio_sector);
mddev_check_writesame(mddev, split);
+ mddev_check_write_zeroes(mddev, split);
generic_make_request(split);
}
} while (split != bio);
diff --git a/drivers/md/md.h b/drivers/md/md.h
index dde8ecb760c8..1e76d64ce180 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -709,4 +709,11 @@ static inline void mddev_check_writesame(struct mddev *mddev, struct bio *bio)
!bdev_get_queue(bio->bi_bdev)->limits.max_write_same_sectors)
mddev->queue->limits.max_write_same_sectors = 0;
}
+
+static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio)
+{
+ if (bio_op(bio) == REQ_OP_WRITE_ZEROES &&
+ !bdev_get_queue(bio->bi_bdev)->limits.max_write_zeroes_sectors)
+ mddev->queue->limits.max_write_zeroes_sectors = 0;
+}
#endif /* _MD_MD_H */
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 79a12b59250b..e95d521d93e9 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -139,6 +139,7 @@ static void multipath_make_request(struct mddev *mddev, struct bio * bio)
mp_bh->bio.bi_end_io = multipath_end_request;
mp_bh->bio.bi_private = mp_bh;
mddev_check_writesame(mddev, &mp_bh->bio);
+ mddev_check_write_zeroes(mddev, &mp_bh->bio);
generic_make_request(&mp_bh->bio);
return;
}
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 93347ca7c7a6..ce7a6a56cf73 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -383,6 +383,7 @@ static int raid0_run(struct mddev *mddev)
blk_queue_max_hw_sectors(mddev->queue, mddev->chunk_sectors);
blk_queue_max_write_same_sectors(mddev->queue, mddev->chunk_sectors);
+ blk_queue_max_write_zeroes_sectors(mddev->queue, mddev->chunk_sectors);
blk_queue_max_discard_sectors(mddev->queue, mddev->chunk_sectors);
blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);
@@ -504,6 +505,7 @@ static void raid0_make_request(struct mddev *mddev, struct bio *bio)
split, disk_devt(mddev->gendisk),
bio_sector);
mddev_check_writesame(mddev, split);
+ mddev_check_write_zeroes(mddev, split);
generic_make_request(split);
}
} while (split != bio);
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index a34f58772022..b59cc100320a 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -3177,8 +3177,10 @@ static int raid1_run(struct mddev *mddev)
if (IS_ERR(conf))
return PTR_ERR(conf);
- if (mddev->queue)
+ if (mddev->queue) {
blk_queue_max_write_same_sectors(mddev->queue, 0);
+ blk_queue_max_write_zeroes_sectors(mddev->queue, 0);
+ }
rdev_for_each(rdev, mddev) {
if (!mddev->gendisk)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index e89a8d78a9ed..28ec3a93acee 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -3749,6 +3749,7 @@ static int raid10_run(struct mddev *mddev)
blk_queue_max_discard_sectors(mddev->queue,
mddev->chunk_sectors);
blk_queue_max_write_same_sectors(mddev->queue, 0);
+ blk_queue_max_write_zeroes_sectors(mddev->queue, 0);
blk_queue_io_min(mddev->queue, chunk_size);
if (conf->geo.raid_disks % conf->geo.near_copies)
blk_queue_io_opt(mddev->queue, chunk_size * conf->geo.raid_disks);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index ed5cd705b985..8cf1f86dcd05 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -7272,6 +7272,7 @@ static int raid5_run(struct mddev *mddev)
mddev->queue->limits.discard_zeroes_data = 0;
blk_queue_max_write_same_sectors(mddev->queue, 0);
+ blk_queue_max_write_zeroes_sectors(mddev->queue, 0);
rdev_for_each(rdev, mddev) {
disk_stack_limits(mddev->gendisk, rdev->bdev,
--
2.11.0
^ permalink raw reply related
* [PATCH 06/27] dm io: discards don't take a payload
From: Christoph Hellwig @ 2017-04-05 17:21 UTC (permalink / raw)
To: axboe, martin.petersen, agk, snitzer, shli, philipp.reisner,
lars.ellenberg
Cc: linux-block, linux-scsi, drbd-dev, dm-devel, linux-raid
In-Reply-To: <20170405172125.22600-1-hch@lst.de>
Fix up do_region to not allocate a bio_vec for discards. We've
got rid of the discard payload allocated by the caller years ago.
Obviously this wasn't actually harmful given how long it's been
there, but it's still good to avoid the pointless allocation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
drivers/md/dm-io.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 03940bf36f6c..b808cbe22678 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -328,11 +328,17 @@ static void do_region(int op, int op_flags, unsigned region,
/*
* Allocate a suitably sized-bio.
*/
- if ((op == REQ_OP_DISCARD) || (op == REQ_OP_WRITE_SAME))
+ switch (op) {
+ case REQ_OP_DISCARD:
+ num_bvecs = 0;
+ break;
+ case REQ_OP_WRITE_SAME:
num_bvecs = 1;
- else
+ break;
+ default:
num_bvecs = min_t(int, BIO_MAX_PAGES,
dm_sector_div_up(remaining, (PAGE_SIZE >> SECTOR_SHIFT)));
+ }
bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios);
bio->bi_iter.bi_sector = where->sector + (where->count - remaining);
--
2.11.0
^ permalink raw reply related
page: next (older) | prev (newer) | latest
- recent:[subjects (threaded)|topics (new)|topics (active)]
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox