[Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Suresh Kumar]

pf->rss_size_max is hardcoded and always prints max rss count as 64.

Eg:
  kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:  104/64

whereas  ethtool reports the correct value from "vsi->num_queue_pairs"

Channel parameters for eno33:
Pre-set maximums:
RX:     n/a
TX:     n/a
Other:      1
Combined:   104
Current hardware settings:
RX:     n/a
TX:     n/a
Other:      1
Combined:   104  <-------

and is misleading.

Change it to vsi->num_queue_pairs

Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index d5519af34657..f5c1ec190f7e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
 		i40e_pf_config_rss(pf);
 	}
 	dev_info(&pf->pdev->dev, "User requested queue count/HW max RSS count:  %d/%d\n",
-		 vsi->req_queue_pairs, pf->rss_size_max);
+		 vsi->req_queue_pairs, vsi->num_queue_pairs);
 	return pf->alloc_rss_size;
 }
 
-- 
2.43.0

[PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Suresh Kumar]

pf->rss_size_max is hardcoded and always prints max rss count as 64.

Eg:
  kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:  104/64

whereas  ethtool reports the correct value from "vsi->num_queue_pairs"

Channel parameters for eno33:
Pre-set maximums:
RX:     n/a
TX:     n/a
Other:      1
Combined:   104
Current hardware settings:
RX:     n/a
TX:     n/a
Other:      1
Combined:   104  <-------

and is misleading.

Change it to vsi->num_queue_pairs

Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index d5519af34657..f5c1ec190f7e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
 		i40e_pf_config_rss(pf);
 	}
 	dev_info(&pf->pdev->dev, "User requested queue count/HW max RSS count:  %d/%d\n",
-		 vsi->req_queue_pairs, pf->rss_size_max);
+		 vsi->req_queue_pairs, vsi->num_queue_pairs);
 	return pf->alloc_rss_size;
 }
 
-- 
2.43.0

Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Simon Horman]

On Sat, Jan 20, 2024 at 12:58:06PM +0530, Suresh Kumar wrote:
> pf->rss_size_max is hardcoded and always prints max rss count as 64.
> 
> Eg:
>   kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:  104/64
> 
> whereas  ethtool reports the correct value from "vsi->num_queue_pairs"
> 
> Channel parameters for eno33:
> Pre-set maximums:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104
> Current hardware settings:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104  <-------
> 
> and is misleading.
> 
> Change it to vsi->num_queue_pairs
> 
> Signed-off-by: Suresh Kumar <suresh2514@gmail.com>

Hi Suresh,

following-up on our earlier emails.

I do think that if this it is a fix it should have a fixes tag.
Which should be for the commit where the bug was first visible to users.

Re: [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Simon Horman]

On Sat, Jan 20, 2024 at 12:58:06PM +0530, Suresh Kumar wrote:
> pf->rss_size_max is hardcoded and always prints max rss count as 64.
> 
> Eg:
>   kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:  104/64
> 
> whereas  ethtool reports the correct value from "vsi->num_queue_pairs"
> 
> Channel parameters for eno33:
> Pre-set maximums:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104
> Current hardware settings:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104  <-------
> 
> and is misleading.
> 
> Change it to vsi->num_queue_pairs
> 
> Signed-off-by: Suresh Kumar <suresh2514@gmail.com>

Hi Suresh,

following-up on our earlier emails.

I do think that if this it is a fix it should have a fixes tag.
Which should be for the commit where the bug was first visible to users.

Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[suresh ks]

[-- Attachment #1: Type: text/plain, Size: 3449 bytes --]

Hi Simon,

Thanks a lot for getting back to me.

I would say, it's not fixing any issue.  This is since the beginning.   My
analysis is given below:

[1]
If I check the i40e_reconfig_rss_queues() function history, I see
'pf->rss_size_max' has been used since the beginning.

Later via the below commit, we enabled more than 64 RSS.    <<<<<

+++
commit 9a3bd2f1e38e5f668200b5e720b4d87023f394d2
Author: Anjali Singhai Jain <anjali.singhai@intel.com>
Date:   Tue Feb 24 06:58:44 2015 +0000

    i40e: Enable more than 64 qps for the Main VSI

    When running in a single TC mode the HW can be configured to enable
more
    than max RSS qps for the Main VSI. This  patch makes it possible to
    enable as many as num_online_cpus().

    ethtool -L can still be used to reconfigure number of qps
    to a smaller value.

    Change-ID: I3e2df085276982603d86dfd79477c0ada8d30b8f
    Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
    Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
    Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
b/drivers/net/ethernet/intel/i40e/i40e_main.c
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -7252,23 +7259,27 @@
 int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
 {
+   struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
+   int new_rss_size;
+
    if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
        return 0;

-   queue_count = min_t(int, queue_count, pf->rss_size_max);
+   new_rss_size = min_t(int, queue_count, pf->rss_size_max);

-   if (queue_count != pf->rss_size) {
+   if (queue_count != vsi->num_queue_pairs) {
+       vsi->req_queue_pairs = queue_count;
        i40e_prep_for_reset(pf);
....
+++

So accordingly we should have changed  to using 'vsi->num_queue_pairs'
instead of 'pf->rss_size_max'  to print maximum rss size. Currently it's
printing 64 as maximum RSS whereas the system supports more than that.
 It's evident in my commit message kernel log which says:
  "kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:
 104/64".

It should have been 104/104 <<<<

So I am a bit confused about whether I should add a 'Fixes:' tag  and even
if I use a tag, which commit I should show here.


thanks....
*Suresh KS*
suresh2514@gmail.com
91-7709100053



On Tue, Jan 23, 2024 at 2:21 AM Simon Horman <horms@kernel.org> wrote:

> On Sat, Jan 20, 2024 at 12:58:06PM +0530, Suresh Kumar wrote:
> > pf->rss_size_max is hardcoded and always prints max rss count as 64.
> >
> > Eg:
> >   kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> count:  104/64
> >
> > whereas  ethtool reports the correct value from "vsi->num_queue_pairs"
> >
> > Channel parameters for eno33:
> > Pre-set maximums:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104
> > Current hardware settings:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104  <-------
> >
> > and is misleading.
> >
> > Change it to vsi->num_queue_pairs
> >
> > Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
>
> Hi Suresh,
>
> following-up on our earlier emails.
>
> I do think that if this it is a fix it should have a fixes tag.
> Which should be for the commit where the bug was first visible to users.
>

[-- Attachment #2: Type: text/html, Size: 5195 bytes --]

Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> Sent: Tuesday, January 30, 2024 9:26 AM
> To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count
> in kernel ring buffer
> 
> FWD to Alex
> 
> 
> -------- Forwarded Message --------
> Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> kernel ring buffer
> Date: Sat, 20 Jan 2024 12:58:06 +0530
> From: Suresh Kumar <suresh2514@gmail.com>
> To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> CC: Suresh Kumar <suresh2514@gmail.com>
> 
> pf->rss_size_max is hardcoded and always prints max rss count as
> 64.
> 
> Eg:
>    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> count:  104/64
> 
> whereas  ethtool reports the correct value from "vsi-
> >num_queue_pairs"
> 
> Channel parameters for eno33:
> Pre-set maximums:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104
> Current hardware settings:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104  <-------
> 
> and is misleading.
> 
> Change it to vsi->num_queue_pairs

Please reject this patch, it breaks driver logging.
The massage clearly states that it dumps max rss queues number that f/w supports.

Thank you
 
> Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> ---
>   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index d5519af34657..f5c1ec190f7e 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> *pf, int queue_count)
>   		i40e_pf_config_rss(pf);
>   	}
>   	dev_info(&pf->pdev->dev, "User requested queue count/HW max
> RSS
> count:  %d/%d\n",
> -		 vsi->req_queue_pairs, pf->rss_size_max);
> +		 vsi->req_queue_pairs, vsi->num_queue_pairs);
>   	return pf->alloc_rss_size;
>   }
>   -- 2.43.0
> 

RE: [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> Sent: Tuesday, January 30, 2024 9:26 AM
> To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count
> in kernel ring buffer
> 
> FWD to Alex
> 
> 
> -------- Forwarded Message --------
> Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> kernel ring buffer
> Date: Sat, 20 Jan 2024 12:58:06 +0530
> From: Suresh Kumar <suresh2514@gmail.com>
> To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> CC: Suresh Kumar <suresh2514@gmail.com>
> 
> pf->rss_size_max is hardcoded and always prints max rss count as
> 64.
> 
> Eg:
>    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> count:  104/64
> 
> whereas  ethtool reports the correct value from "vsi-
> >num_queue_pairs"
> 
> Channel parameters for eno33:
> Pre-set maximums:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104
> Current hardware settings:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104  <-------
> 
> and is misleading.
> 
> Change it to vsi->num_queue_pairs

Please reject this patch, it breaks driver logging.
The massage clearly states that it dumps max rss queues number that f/w supports.

Thank you
 
> Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> ---
>   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index d5519af34657..f5c1ec190f7e 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> *pf, int queue_count)
>   		i40e_pf_config_rss(pf);
>   	}
>   	dev_info(&pf->pdev->dev, "User requested queue count/HW max
> RSS
> count:  %d/%d\n",
> -		 vsi->req_queue_pairs, pf->rss_size_max);
> +		 vsi->req_queue_pairs, vsi->num_queue_pairs);
>   	return pf->alloc_rss_size;
>   }
>   -- 2.43.0
> 

Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[suresh ks]

[-- Attachment #1: Type: text/plain, Size: 3518 bytes --]

Hi,

Thanks for checking.  Do I need to do anything to reject this patch? If
yes, please let me know.
This is first sucht experience for me.


Would like to get some understanding on below kernel logging for which I
suggested the patch.

The ethtool reports maximum supported queue as 104 and when I set it, it
takes that value also. But kernel logs:

  "kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:
 104/64".

So does it meas the firmware supports only 64, but we can set 104 or
something like that ?

Is it any virtual queue set by driver as per number of CPUs ?.  What I
observe is, system has 104 CPUs.
I have another such machine  where maximum supported queue mentioned by
ethtool is as per number of CPUs. But here again, the 'max RSS' is reported
less by kernel.



thanks....
*Suresh KS*
suresh2514@gmail.com
91-7709100053



On Tue, Jan 30, 2024 at 2:03 PM Loktionov, Aleksandr <
aleksandr.loktionov@intel.com> wrote:

> > -----Original Message-----
> > From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> > Sent: Tuesday, January 30, 2024 9:26 AM
> > To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> > Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count
> > in kernel ring buffer
> >
> > FWD to Alex
> >
> >
> > -------- Forwarded Message --------
> > Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> > kernel ring buffer
> > Date: Sat, 20 Jan 2024 12:58:06 +0530
> > From: Suresh Kumar <suresh2514@gmail.com>
> > To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> > davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> > pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> > netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> > CC: Suresh Kumar <suresh2514@gmail.com>
> >
> > pf->rss_size_max is hardcoded and always prints max rss count as
> > 64.
> >
> > Eg:
> >    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> > count:  104/64
> >
> > whereas  ethtool reports the correct value from "vsi-
> > >num_queue_pairs"
> >
> > Channel parameters for eno33:
> > Pre-set maximums:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104
> > Current hardware settings:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104  <-------
> >
> > and is misleading.
> >
> > Change it to vsi->num_queue_pairs
>
> Please reject this patch, it breaks driver logging.
> The massage clearly states that it dumps max rss queues number that f/w
> supports.
>
> Thank you
>
> > Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> > ---
> >   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > index d5519af34657..f5c1ec190f7e 100644
> > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> > *pf, int queue_count)
> >               i40e_pf_config_rss(pf);
> >       }
> >       dev_info(&pf->pdev->dev, "User requested queue count/HW max
> > RSS
> > count:  %d/%d\n",
> > -              vsi->req_queue_pairs, pf->rss_size_max);
> > +              vsi->req_queue_pairs, vsi->num_queue_pairs);
> >       return pf->alloc_rss_size;
> >   }
> >   -- 2.43.0
> >
>
>

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Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Loktionov, Aleksandr]

[-- Attachment #1: Type: text/plain, Size: 4733 bytes --]

Good day Suresh

The message:
  "kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:  104/64".

Means that h/w supports only 64ques, but user requested 104.

If your OS displays maximum possible ques more than h/w supports then there is a bug in display routines.

With the best regards
Alex

From: suresh ks <suresh2514@gmail.com>
Sent: Thursday, February 8, 2024 2:14 PM
To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
Cc: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>; Brandeburg, Jesse <jesse.brandeburg@intel.com>; Nguyen, Anthony L <anthony.l.nguyen@intel.com>; davem@davemloft.net; edumazet@google.com; kuba@kernel.org; pabeni@redhat.com; intel-wired-lan@lists.osuosl.org; netdev@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: Re: [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

Hi,

Thanks for checking.  Do I need to do anything to reject this patch? If yes, please let me know.
This is first sucht experience for me.


Would like to get some understanding on below kernel logging for which I suggested the patch.

The ethtool reports maximum supported queue as 104 and when I set it, it takes that value also. But kernel logs:

  "kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:  104/64".

So does it meas the firmware supports only 64, but we can set 104 or something like that ?

Is it any virtual queue set by driver as per number of CPUs ?.  What I observe is, system has 104 CPUs.
I have another such machine  where maximum supported queue mentioned by ethtool is as per number of CPUs. But here again, the 'max RSS' is reported less by kernel.



thanks....
Suresh KS
suresh2514@gmail.com<mailto:suresh2514@gmail.com>
91-7709100053


On Tue, Jan 30, 2024 at 2:03 PM Loktionov, Aleksandr <aleksandr.loktionov@intel.com<mailto:aleksandr.loktionov@intel.com>> wrote:
> -----Original Message-----
> From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com<mailto:przemyslaw.kitszel@intel.com>>
> Sent: Tuesday, January 30, 2024 9:26 AM
> To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com<mailto:aleksandr.loktionov@intel.com>>
> Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count
> in kernel ring buffer
>
> FWD to Alex
>
>
> -------- Forwarded Message --------
> Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> kernel ring buffer
> Date: Sat, 20 Jan 2024 12:58:06 +0530
> From: Suresh Kumar <suresh2514@gmail.com<mailto:suresh2514@gmail.com>>
> To: jesse.brandeburg@intel.com<mailto:jesse.brandeburg@intel.com>, anthony.l.nguyen@intel.com<mailto:anthony.l.nguyen@intel.com>,
> davem@davemloft.net<mailto:davem@davemloft.net>, edumazet@google.com<mailto:edumazet@google.com>, kuba@kernel.org<mailto:kuba@kernel.org>,
> pabeni@redhat.com<mailto:pabeni@redhat.com>, intel-wired-lan@lists.osuosl.org<mailto:intel-wired-lan@lists.osuosl.org>,
> netdev@vger.kernel.org<mailto:netdev@vger.kernel.org>, linux-kernel@vger.kernel.org<mailto:linux-kernel@vger.kernel.org>
> CC: Suresh Kumar <suresh2514@gmail.com<mailto:suresh2514@gmail.com>>
>
> pf->rss_size_max is hardcoded and always prints max rss count as
> 64.
>
> Eg:
>    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> count:  104/64
>
> whereas  ethtool reports the correct value from "vsi-
> >num_queue_pairs"
>
> Channel parameters for eno33:
> Pre-set maximums:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104
> Current hardware settings:
> RX:     n/a
> TX:     n/a
> Other:      1
> Combined:   104  <-------
>
> and is misleading.
>
> Change it to vsi->num_queue_pairs

Please reject this patch, it breaks driver logging.
The massage clearly states that it dumps max rss queues number that f/w supports.

Thank you

> Signed-off-by: Suresh Kumar <suresh2514@gmail.com<mailto:suresh2514@gmail.com>>
> ---
>   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index d5519af34657..f5c1ec190f7e 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> *pf, int queue_count)
>               i40e_pf_config_rss(pf);
>       }
>       dev_info(&pf->pdev->dev, "User requested queue count/HW max
> RSS
> count:  %d/%d\n",
> -              vsi->req_queue_pairs, pf->rss_size_max);
> +              vsi->req_queue_pairs, vsi->num_queue_pairs);
>       return pf->alloc_rss_size;
>   }
>   -- 2.43.0
>

[-- Attachment #2: Type: text/html, Size: 10956 bytes --]

Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[suresh ks]

[-- Attachment #1: Type: text/plain, Size: 5375 bytes --]

Hi Alex,

Thanks.  Yes, I do feel it's a bug in i40e driver  printing this info.  See
the ethtool output from this system:

+++
Channel parameters for eno33:
Pre-set maximums:
RX:     n/a
TX:     n/a
Other:      1
Combined:   104  <-
Current hardware settings:
RX:     n/a
TX:     n/a
Other:      1
Combined:   104  <-------
+++

So I understand the maximum supported queue size is 104  But while setting
this value via ethtool, we got below message from kernel logs:

  "kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:
 104/64".


thanks....
*Suresh KS*
suresh2514@gmail.com
91-7709100053



On Thu, Feb 8, 2024 at 6:59 PM Loktionov, Aleksandr <
aleksandr.loktionov@intel.com> wrote:

> Good day Suresh
>
>
>
> The message:
>
>   "kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:
>  104/64".
>
>
>
> Means that h/w supports only 64ques, but user requested 104.
>
>
>
> If your OS displays maximum possible ques more than h/w supports then
> there is a bug in display routines.
>
>
>
> With the best regards
>
> Alex
>
>
>
> *From:* suresh ks <suresh2514@gmail.com>
> *Sent:* Thursday, February 8, 2024 2:14 PM
> *To:* Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> *Cc:* Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>; Brandeburg,
> Jesse <jesse.brandeburg@intel.com>; Nguyen, Anthony L <
> anthony.l.nguyen@intel.com>; davem@davemloft.net; edumazet@google.com;
> kuba@kernel.org; pabeni@redhat.com; intel-wired-lan@lists.osuosl.org;
> netdev@vger.kernel.org; linux-kernel@vger.kernel.org
> *Subject:* Re: [PATCH iwl v2] i40e: print correct hw max rss count in
> kernel ring buffer
>
>
>
> Hi,
>
>
>
> Thanks for checking.  Do I need to do anything to reject this patch? If
> yes, please let me know.
>
> This is first sucht experience for me.
>
>
>
>
>
> Would like to get some understanding on below kernel logging for which I
> suggested the patch.
>
>
>
> The ethtool reports maximum supported queue as 104 and when I set it, it
> takes that value also. But kernel logs:
>
>
>
>   "kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS count:
>  104/64".
>
>
>
> So does it meas the firmware supports only 64, but we can set 104 or
> something like that ?
>
>
>
> Is it any virtual queue set by driver as per number of CPUs ?.  What I
> observe is, system has 104 CPUs.
>
> I have another such machine  where maximum supported queue mentioned by
> ethtool is as per number of CPUs. But here again, the 'max RSS' is reported
> less by kernel.
>
>
>
>
>
>
>
> thanks....
>
> *Suresh KS*
>
> suresh2514@gmail.com
>
> 91-7709100053
>
>
>
>
>
> On Tue, Jan 30, 2024 at 2:03 PM Loktionov, Aleksandr <
> aleksandr.loktionov@intel.com> wrote:
>
> > -----Original Message-----
> > From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> > Sent: Tuesday, January 30, 2024 9:26 AM
> > To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> > Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count
> > in kernel ring buffer
> >
> > FWD to Alex
> >
> >
> > -------- Forwarded Message --------
> > Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> > kernel ring buffer
> > Date: Sat, 20 Jan 2024 12:58:06 +0530
> > From: Suresh Kumar <suresh2514@gmail.com>
> > To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> > davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> > pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> > netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> > CC: Suresh Kumar <suresh2514@gmail.com>
> >
> > pf->rss_size_max is hardcoded and always prints max rss count as
> > 64.
> >
> > Eg:
> >    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> > count:  104/64
> >
> > whereas  ethtool reports the correct value from "vsi-
> > >num_queue_pairs"
> >
> > Channel parameters for eno33:
> > Pre-set maximums:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104
> > Current hardware settings:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104  <-------
> >
> > and is misleading.
> >
> > Change it to vsi->num_queue_pairs
>
> Please reject this patch, it breaks driver logging.
> The massage clearly states that it dumps max rss queues number that f/w
> supports.
>
> Thank you
>
> > Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> > ---
> >   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > index d5519af34657..f5c1ec190f7e 100644
> > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> > *pf, int queue_count)
> >               i40e_pf_config_rss(pf);
> >       }
> >       dev_info(&pf->pdev->dev, "User requested queue count/HW max
> > RSS
> > count:  %d/%d\n",
> > -              vsi->req_queue_pairs, pf->rss_size_max);
> > +              vsi->req_queue_pairs, vsi->num_queue_pairs);
> >       return pf->alloc_rss_size;
> >   }
> >   -- 2.43.0
> >
>
>

[-- Attachment #2: Type: text/html, Size: 11418 bytes --]

Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Maciej Fijalkowski]

On Tue, Jan 30, 2024 at 08:33:43AM +0000, Loktionov, Aleksandr wrote:
> > -----Original Message-----
> > From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> > Sent: Tuesday, January 30, 2024 9:26 AM
> > To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> > Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count

Subject should be iwl-net and you should have Fixes: tag.
I also would like you to go through
https://docs.kernel.org/process/submitting-patches.html

or any other document that would prepare you for your first submission.

> > in kernel ring buffer
> > 
> > FWD to Alex
> > 
> > 
> > -------- Forwarded Message --------
> > Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> > kernel ring buffer
> > Date: Sat, 20 Jan 2024 12:58:06 +0530
> > From: Suresh Kumar <suresh2514@gmail.com>
> > To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> > davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> > pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> > netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> > CC: Suresh Kumar <suresh2514@gmail.com>
> > 
> > pf->rss_size_max is hardcoded and always prints max rss count as
> > 64.
> > 
> > Eg:
> >    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> > count:  104/64
> > 
> > whereas  ethtool reports the correct value from "vsi-
> > >num_queue_pairs"
> > 
> > Channel parameters for eno33:
> > Pre-set maximums:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104
> > Current hardware settings:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104  <-------
> > 
> > and is misleading.
> > 
> > Change it to vsi->num_queue_pairs
> 
> Please reject this patch, it breaks driver logging.
> The massage clearly states that it dumps max rss queues number that f/w supports.

...which would imply that you would be able to work with anything more
than 64 queues. From a quick glance rss_size_max comes from early i40e
days and if that would be the limit indeed then driver allowing 104 queues
would be a disaster, no?

> 
> Thank you
>  
> > Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> > ---
> >   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > index d5519af34657..f5c1ec190f7e 100644
> > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> > *pf, int queue_count)
> >   		i40e_pf_config_rss(pf);
> >   	}
> >   	dev_info(&pf->pdev->dev, "User requested queue count/HW max
> > RSS
> > count:  %d/%d\n",
> > -		 vsi->req_queue_pairs, pf->rss_size_max);
> > +		 vsi->req_queue_pairs, vsi->num_queue_pairs);

IMHO this should be vsi->alloc_queue_pairs instead.

> >   	return pf->alloc_rss_size;
> >   }
> >   -- 2.43.0
> > 
> 

Re: [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Maciej Fijalkowski]

On Tue, Jan 30, 2024 at 08:33:43AM +0000, Loktionov, Aleksandr wrote:
> > -----Original Message-----
> > From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> > Sent: Tuesday, January 30, 2024 9:26 AM
> > To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> > Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count

Subject should be iwl-net and you should have Fixes: tag.
I also would like you to go through
https://docs.kernel.org/process/submitting-patches.html

or any other document that would prepare you for your first submission.

> > in kernel ring buffer
> > 
> > FWD to Alex
> > 
> > 
> > -------- Forwarded Message --------
> > Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> > kernel ring buffer
> > Date: Sat, 20 Jan 2024 12:58:06 +0530
> > From: Suresh Kumar <suresh2514@gmail.com>
> > To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> > davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> > pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> > netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> > CC: Suresh Kumar <suresh2514@gmail.com>
> > 
> > pf->rss_size_max is hardcoded and always prints max rss count as
> > 64.
> > 
> > Eg:
> >    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> > count:  104/64
> > 
> > whereas  ethtool reports the correct value from "vsi-
> > >num_queue_pairs"
> > 
> > Channel parameters for eno33:
> > Pre-set maximums:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104
> > Current hardware settings:
> > RX:     n/a
> > TX:     n/a
> > Other:      1
> > Combined:   104  <-------
> > 
> > and is misleading.
> > 
> > Change it to vsi->num_queue_pairs
> 
> Please reject this patch, it breaks driver logging.
> The massage clearly states that it dumps max rss queues number that f/w supports.

...which would imply that you would be able to work with anything more
than 64 queues. From a quick glance rss_size_max comes from early i40e
days and if that would be the limit indeed then driver allowing 104 queues
would be a disaster, no?

> 
> Thank you
>  
> > Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> > ---
> >   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > index d5519af34657..f5c1ec190f7e 100644
> > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> > *pf, int queue_count)
> >   		i40e_pf_config_rss(pf);
> >   	}
> >   	dev_info(&pf->pdev->dev, "User requested queue count/HW max
> > RSS
> > count:  %d/%d\n",
> > -		 vsi->req_queue_pairs, pf->rss_size_max);
> > +		 vsi->req_queue_pairs, vsi->num_queue_pairs);

IMHO this should be vsi->alloc_queue_pairs instead.

> >   	return pf->alloc_rss_size;
> >   }
> >   -- 2.43.0
> > 
> 

Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[suresh ks]

[-- Attachment #1: Type: text/plain, Size: 3960 bytes --]

Hi Maciej,

Thanks for the links and taking time to review.

I was following the ethtool codes and suggested vsi->num_queue_pairs.
Maybe vsi->alloc_queue_pairs is the right option as you suggested. I have
not read much of i40e codes. Just that one of our customers reported this
issue and I was reviewing the codes.

I also felt rss_size_max comes from the early i40e days. So I was not sure
what I would add in the 'Fixes:' tag.

Sorry for getting late here. Was on a vacation.


thanks....
*Suresh KS*
suresh2514@gmail.com
91-7709100053



On Thu, Feb 15, 2024 at 9:52 PM Maciej Fijalkowski <
maciej.fijalkowski@intel.com> wrote:

> On Tue, Jan 30, 2024 at 08:33:43AM +0000, Loktionov, Aleksandr wrote:
> > > -----Original Message-----
> > > From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> > > Sent: Tuesday, January 30, 2024 9:26 AM
> > > To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> > > Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count
>
> Subject should be iwl-net and you should have Fixes: tag.
> I also would like you to go through
> https://docs.kernel.org/process/submitting-patches.html
>
> or any other document that would prepare you for your first submission.
>
> > > in kernel ring buffer
> > >
> > > FWD to Alex
> > >
> > >
> > > -------- Forwarded Message --------
> > > Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> > > kernel ring buffer
> > > Date: Sat, 20 Jan 2024 12:58:06 +0530
> > > From: Suresh Kumar <suresh2514@gmail.com>
> > > To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> > > davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> > > pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> > > netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> > > CC: Suresh Kumar <suresh2514@gmail.com>
> > >
> > > pf->rss_size_max is hardcoded and always prints max rss count as
> > > 64.
> > >
> > > Eg:
> > >    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> > > count:  104/64
> > >
> > > whereas  ethtool reports the correct value from "vsi-
> > > >num_queue_pairs"
> > >
> > > Channel parameters for eno33:
> > > Pre-set maximums:
> > > RX:     n/a
> > > TX:     n/a
> > > Other:      1
> > > Combined:   104
> > > Current hardware settings:
> > > RX:     n/a
> > > TX:     n/a
> > > Other:      1
> > > Combined:   104  <-------
> > >
> > > and is misleading.
> > >
> > > Change it to vsi->num_queue_pairs
> >
> > Please reject this patch, it breaks driver logging.
> > The massage clearly states that it dumps max rss queues number that f/w
> supports.
>
> ...which would imply that you would be able to work with anything more
> than 64 queues. From a quick glance rss_size_max comes from early i40e
> days and if that would be the limit indeed then driver allowing 104 queues
> would be a disaster, no?
>
> >
> > Thank you
> >
> > > Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> > > ---
> > >   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
> > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > index d5519af34657..f5c1ec190f7e 100644
> > > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> > > *pf, int queue_count)
> > >             i40e_pf_config_rss(pf);
> > >     }
> > >     dev_info(&pf->pdev->dev, "User requested queue count/HW max
> > > RSS
> > > count:  %d/%d\n",
> > > -            vsi->req_queue_pairs, pf->rss_size_max);
> > > +            vsi->req_queue_pairs, vsi->num_queue_pairs);
>
> IMHO this should be vsi->alloc_queue_pairs instead.
>
> > >     return pf->alloc_rss_size;
> > >   }
> > >   -- 2.43.0
> > >
> >
>

[-- Attachment #2: Type: text/html, Size: 6488 bytes --]

Re: [Intel-wired-lan] [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Maciej Fijalkowski]

On Thu, Mar 07, 2024 at 08:09:47PM +0530, suresh ks wrote:
> Hi Maciej,
> 
> Thanks for the links and taking time to review.

No problem, but please don't top post on linux mailing lists nor don't
respond in HTML. These are 101 rules to participate in upstream
discussions.

> 
> I was following the ethtool codes and suggested vsi->num_queue_pairs.
> Maybe vsi->alloc_queue_pairs is the right option as you suggested. I have
> not read much of i40e codes. Just that one of our customers reported this
> issue and I was reviewing the codes.
> 
> I also felt rss_size_max comes from the early i40e days. So I was not sure
> what I would add in the 'Fixes:' tag.

submitting-patches.html has it explained ;)

> 
> Sorry for getting late here. Was on a vacation.
> 
> 
> thanks....
> *Suresh KS*
> suresh2514@gmail.com
> 91-7709100053
> 
> 
> 
> On Thu, Feb 15, 2024 at 9:52 PM Maciej Fijalkowski <
> maciej.fijalkowski@intel.com> wrote:
> 
> > On Tue, Jan 30, 2024 at 08:33:43AM +0000, Loktionov, Aleksandr wrote:
> > > > -----Original Message-----
> > > > From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> > > > Sent: Tuesday, January 30, 2024 9:26 AM
> > > > To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> > > > Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count
> >
> > Subject should be iwl-net and you should have Fixes: tag.
> > I also would like you to go through
> > https://docs.kernel.org/process/submitting-patches.html
> >
> > or any other document that would prepare you for your first submission.
> >
> > > > in kernel ring buffer
> > > >
> > > > FWD to Alex
> > > >
> > > >
> > > > -------- Forwarded Message --------
> > > > Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> > > > kernel ring buffer
> > > > Date: Sat, 20 Jan 2024 12:58:06 +0530
> > > > From: Suresh Kumar <suresh2514@gmail.com>
> > > > To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> > > > davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> > > > pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> > > > netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> > > > CC: Suresh Kumar <suresh2514@gmail.com>
> > > >
> > > > pf->rss_size_max is hardcoded and always prints max rss count as
> > > > 64.
> > > >
> > > > Eg:
> > > >    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> > > > count:  104/64
> > > >
> > > > whereas  ethtool reports the correct value from "vsi-
> > > > >num_queue_pairs"
> > > >
> > > > Channel parameters for eno33:
> > > > Pre-set maximums:
> > > > RX:     n/a
> > > > TX:     n/a
> > > > Other:      1
> > > > Combined:   104
> > > > Current hardware settings:
> > > > RX:     n/a
> > > > TX:     n/a
> > > > Other:      1
> > > > Combined:   104  <-------
> > > >
> > > > and is misleading.
> > > >
> > > > Change it to vsi->num_queue_pairs
> > >
> > > Please reject this patch, it breaks driver logging.
> > > The massage clearly states that it dumps max rss queues number that f/w
> > supports.
> >
> > ...which would imply that you would be able to work with anything more
> > than 64 queues. From a quick glance rss_size_max comes from early i40e
> > days and if that would be the limit indeed then driver allowing 104 queues
> > would be a disaster, no?
> >
> > >
> > > Thank you
> > >
> > > > Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> > > > ---
> > > >   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
> > > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > > b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > > index d5519af34657..f5c1ec190f7e 100644
> > > > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > > @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> > > > *pf, int queue_count)
> > > >             i40e_pf_config_rss(pf);
> > > >     }
> > > >     dev_info(&pf->pdev->dev, "User requested queue count/HW max
> > > > RSS
> > > > count:  %d/%d\n",
> > > > -            vsi->req_queue_pairs, pf->rss_size_max);
> > > > +            vsi->req_queue_pairs, vsi->num_queue_pairs);
> >
> > IMHO this should be vsi->alloc_queue_pairs instead.
> >
> > > >     return pf->alloc_rss_size;
> > > >   }
> > > >   -- 2.43.0
> > > >
> > >
> >

Re: [PATCH iwl v2] i40e: print correct hw max rss count in kernel ring buffer

[Maciej Fijalkowski]

On Thu, Mar 07, 2024 at 08:09:47PM +0530, suresh ks wrote:
> Hi Maciej,
> 
> Thanks for the links and taking time to review.

No problem, but please don't top post on linux mailing lists nor don't
respond in HTML. These are 101 rules to participate in upstream
discussions.

> 
> I was following the ethtool codes and suggested vsi->num_queue_pairs.
> Maybe vsi->alloc_queue_pairs is the right option as you suggested. I have
> not read much of i40e codes. Just that one of our customers reported this
> issue and I was reviewing the codes.
> 
> I also felt rss_size_max comes from the early i40e days. So I was not sure
> what I would add in the 'Fixes:' tag.

submitting-patches.html has it explained ;)

> 
> Sorry for getting late here. Was on a vacation.
> 
> 
> thanks....
> *Suresh KS*
> suresh2514@gmail.com
> 91-7709100053
> 
> 
> 
> On Thu, Feb 15, 2024 at 9:52 PM Maciej Fijalkowski <
> maciej.fijalkowski@intel.com> wrote:
> 
> > On Tue, Jan 30, 2024 at 08:33:43AM +0000, Loktionov, Aleksandr wrote:
> > > > -----Original Message-----
> > > > From: Kitszel, Przemyslaw <przemyslaw.kitszel@intel.com>
> > > > Sent: Tuesday, January 30, 2024 9:26 AM
> > > > To: Loktionov, Aleksandr <aleksandr.loktionov@intel.com>
> > > > Subject: Fwd: [PATCH iwl v2] i40e: print correct hw max rss count
> >
> > Subject should be iwl-net and you should have Fixes: tag.
> > I also would like you to go through
> > https://docs.kernel.org/process/submitting-patches.html
> >
> > or any other document that would prepare you for your first submission.
> >
> > > > in kernel ring buffer
> > > >
> > > > FWD to Alex
> > > >
> > > >
> > > > -------- Forwarded Message --------
> > > > Subject: [PATCH iwl v2] i40e: print correct hw max rss count in
> > > > kernel ring buffer
> > > > Date: Sat, 20 Jan 2024 12:58:06 +0530
> > > > From: Suresh Kumar <suresh2514@gmail.com>
> > > > To: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
> > > > davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
> > > > pabeni@redhat.com, intel-wired-lan@lists.osuosl.org,
> > > > netdev@vger.kernel.org, linux-kernel@vger.kernel.org
> > > > CC: Suresh Kumar <suresh2514@gmail.com>
> > > >
> > > > pf->rss_size_max is hardcoded and always prints max rss count as
> > > > 64.
> > > >
> > > > Eg:
> > > >    kernel: i40e 0000:af:00.1: User requested queue count/HW max RSS
> > > > count:  104/64
> > > >
> > > > whereas  ethtool reports the correct value from "vsi-
> > > > >num_queue_pairs"
> > > >
> > > > Channel parameters for eno33:
> > > > Pre-set maximums:
> > > > RX:     n/a
> > > > TX:     n/a
> > > > Other:      1
> > > > Combined:   104
> > > > Current hardware settings:
> > > > RX:     n/a
> > > > TX:     n/a
> > > > Other:      1
> > > > Combined:   104  <-------
> > > >
> > > > and is misleading.
> > > >
> > > > Change it to vsi->num_queue_pairs
> > >
> > > Please reject this patch, it breaks driver logging.
> > > The massage clearly states that it dumps max rss queues number that f/w
> > supports.
> >
> > ...which would imply that you would be able to work with anything more
> > than 64 queues. From a quick glance rss_size_max comes from early i40e
> > days and if that would be the limit indeed then driver allowing 104 queues
> > would be a disaster, no?
> >
> > >
> > > Thank you
> > >
> > > > Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
> > > > ---
> > > >   drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +-
> > > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > > b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > > index d5519af34657..f5c1ec190f7e 100644
> > > > --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > > +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> > > > @@ -12524,7 +12524,7 @@ int i40e_reconfig_rss_queues(struct i40e_pf
> > > > *pf, int queue_count)
> > > >             i40e_pf_config_rss(pf);
> > > >     }
> > > >     dev_info(&pf->pdev->dev, "User requested queue count/HW max
> > > > RSS
> > > > count:  %d/%d\n",
> > > > -            vsi->req_queue_pairs, pf->rss_size_max);
> > > > +            vsi->req_queue_pairs, vsi->num_queue_pairs);
> >
> > IMHO this should be vsi->alloc_queue_pairs instead.
> >
> > > >     return pf->alloc_rss_size;
> > > >   }
> > > >   -- 2.43.0
> > > >
> > >
> >