netdev - Re: mlx5 driver is broken when pci_msix_can_alloc

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Date: Wed, 31 May 2023 14:48:34 -0700
From: Saeed Mahameed <saeed@...nel.org>
To: Linux regressions mailing list <regressions@...ts.linux.dev>
Cc: Niklas Schnelle <schnelle@...ux.ibm.com>, Shay Drory <shayd@...dia.com>,
	chuck.lever@...cle.com, Saeed Mahameed <saeedm@...dia.com>,
	Eli Cohen <elic@...dia.com>, netdev@...r.kernel.org
Subject: Re: mlx5 driver is broken when pci_msix_can_alloc_dyn() is false
 with v6.4-rc4

On 31 May 15:57, Linux regression tracking (Thorsten Leemhuis) wrote:
>
>
>On 31.05.23 15:43, Niklas Schnelle wrote:
>> On Wed, 2023-05-31 at 15:33 +0200, Linux regression tracking #adding
>> (Thorsten Leemhuis) wrote:
>>> [CCing the regression list, as it should be in the loop for regressions:
>>> https://docs.kernel.org/admin-guide/reporting-regressions.html]
>>>
>>> [TLDR: I'm adding this report to the list of tracked Linux kernel
>>> regressions; the text you find below is based on a few templates
>>> paragraphs you might have encountered already in similar form.
>>> See link in footer if these mails annoy you.]
>>>
>>> On 30.05.23 15:04, Niklas Schnelle wrote:
>>>>
>>>> With v6.4-rc4 I'm getting a stream of RX and TX timeouts when trying to
>>>> use ConnectX-4 and ConnectX-6 VFs on s390. I've bisected this and found
>>>> the following commit to be broken:
>>>>
>>>> commit 1da438c0ae02396dc5018b63237492cb5908608d
>>>> Author: Shay Drory <shayd@...dia.com>
>>>> Date:   Mon Apr 17 10:57:50 2023 +0300
>>>> [...]
>>>
>>> Thanks for the report. To be sure the issue doesn't fall through the
>>> cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression
>>> tracking bot:
>>>
>>> #regzbot ^introduced 1da438c0ae02396dc5018b63237492cb5908608d
>>> #regzbot title net/mlx5: RX and TX timeouts with ConnectX-4 and
>>> ConnectX-6 VFs on s390
>>> #regzbot ignore-activity
>>>
>>> This isn't a regression? This issue or a fix for it are already
>>> discussed somewhere else? It was fixed already? You want to clarify when
>>> the regression started to happen? Or point out I got the title or
>>> something else totally wrong? Then just reply and tell me -- ideally
>>> while also telling regzbot about it, as explained by the page listed in
>>> the footer of this mail.
>>>
>>> Developers: When fixing the issue, remember to add 'Link:' tags pointing
>>> to the report (the parent of this mail). See page linked in footer for
>>> details.
>>>
>>> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
>>> --
>>> Everything you wanna know about Linux kernel regression tracking:
>>> https://linux-regtracking.leemhuis.info/about/#tldr
>>> That page also explains what to do if mails like this annoy you.
>>
>> Hi Thorsten,
>>
>> Thanks for tracking. I actually already sent a fix patch (and v2) for
>> this. Sadly I forgot to link to this mail. Let's see if I can get the
>> regzbot command right to update it. As for the humans the latest fix
>> patch is here:
>>
>> https://lore.kernel.org/netdev/20230531084856.2091666-1-schnelle@linux.ibm.com/
>>

I picked up this patch to net-mlx5 tree, will post to net shortly.

Thanks,
Saeed.

>> Thanks,
>> Niklas
>>
>> #regzbot fix: net/mlx5: Fix setting of irq->map.index for static IRQ case
>
>Looks right, many thx. Sorry, should have looked for that myself. Sadly
>regzbot doesn't yet search for existing post on lore with a matching
>subject, so for completeness let me point manually to it while at it:
>
>#regzbot monitor:
>https://lore.kernel.org/netdev/20230531084856.2091666-1-schnelle@linux.ibm.com/
>
>Ciao, Thorsten
>