linux-kernel - Re: [PATCH v11 8/8] vhost: use vhost

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Message-ID: <6084703a-aaba-4069-0d11-48782d016bdd@leemhuis.info>
Date:   Fri, 2 Jun 2023 13:38:32 +0200
From:   Thorsten Leemhuis <regressions@...mhuis.info>
To:     nicolas.dichtel@...nd.com,
        Mike Christie <michael.christie@...cle.com>, hch@...radead.org,
        stefanha@...hat.com, jasowang@...hat.com, mst@...hat.com,
        sgarzare@...hat.com, virtualization@...ts.linux-foundation.org,
        brauner@...nel.org, ebiederm@...ssion.com,
        torvalds@...ux-foundation.org, konrad.wilk@...cle.com,
        linux-kernel@...r.kernel.org,
        Linux kernel regressions list <regressions@...ts.linux.dev>
Subject: Re: [PATCH v11 8/8] vhost: use vhost_tasks for worker threads

[TLDR: This mail in primarily relevant for Linux regression tracking. A
change or fix related to the regression discussed in this thread was
posted or applied, but it did not use a Link: tag to point to the
report, as Linus and the documentation call for. Things happen, no
worries -- but now the regression tracking bot needs to be told manually
about the fix. See link in footer if these mails annoy you.]

On 16.05.23 16:06, Linux regression tracking #adding (Thorsten Leemhuis)
wrote:
> On 05.05.23 15:40, Nicolas Dichtel wrote:
>> Le 03/02/2023 à 00:25, Mike Christie a écrit :
>>> For vhost workers we use the kthread API which inherit's its values from
>>> and checks against the kthreadd thread. This results in the wrong RLIMITs
>>> being checked, so while tools like libvirt try to control the number of
>>> threads based on the nproc rlimit setting we can end up creating more
>>> threads than the user wanted.
>>
>> I have a question about (a side effect of?) this patch. The output of the 'ps'
>> command has changed. Here is an example:
>> [...]
> 
> Thanks for the report. This is already dealt with, but 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 6e890c5d502

#regzbot fix: f9010dbdce911ee1f1af1398a24b1f9f992e0080
#regzbot ignore-activity

BTW, if anyone cares: just checked, it fixes my suspend problem. Thx
everyone!

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.