linux-kernel - Re: [PATCH v4 00/33] Per-VMA locks

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Date:   Tue, 11 Jul 2023 12:39:34 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Leon Romanovsky <leon@...nel.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Sachin Sant <sachinp@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     michel@...pinasse.org, jglisse@...gle.com, mhocko@...e.com,
        hannes@...xchg.org, mgorman@...hsingularity.net, dave@...olabs.net,
        willy@...radead.org, liam.howlett@...cle.com, peterz@...radead.org,
        paulmck@...nel.org, mingo@...hat.com, will@...nel.org,
        luto@...nel.org, songliubraving@...com, peterx@...hat.com,
        david@...hat.com, dhowells@...hat.com, hughd@...gle.com,
        bigeasy@...utronix.de, kent.overstreet@...ux.dev,
        punit.agrawal@...edance.com, lstoakes@...il.com,
        peterjung1337@...il.com, rientjes@...gle.com, chriscli@...gle.com,
        axelrasmussen@...gle.com, joelaf@...gle.com, minchan@...gle.com,
        rppt@...nel.org, jannh@...gle.com, shakeelb@...gle.com,
        tatashin@...gle.com, edumazet@...gle.com, gthelen@...gle.com,
        gurua@...gle.com, arjunroy@...gle.com, soheil@...gle.com,
        leewalsh@...gle.com, posk@...gle.com,
        michalechner92@...glemail.com, linux-mm@...ck.org,
        linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, kernel-team@...roid.com,
        regressions@...mhuis.info,
        Linux kernel regressions list <regressions@...ts.linux.dev>,
        maorg@...dia.com, gal@...dia.com, ranro@...dia.com,
        drort@...dia.com, idok@...dia.com, sergeyy@...dia.com
Subject: Re: [PATCH v4 00/33] Per-VMA locks

On 7/11/23 12:35, Leon Romanovsky wrote:
> 
> On Mon, Feb 27, 2023 at 09:35:59AM -0800, Suren Baghdasaryan wrote:
> 
> <...>
> 
>> Laurent Dufour (1):
>>   powerc/mm: try VMA lock-based page fault handling first
> 
> Hi,
> 
> This series and specifically the commit above broke docker over PPC.
> It causes to docker service stuck while trying to activate. Revert of
> this commit allows us to use docker again.

Hi,

there have been follow-up fixes, that are part of 6.4.3 stable (also
6.5-rc1) Does that version work for you?

Vlastimil

> [user@...-135-3-200-205 ~]# sudo systemctl status docker
> ● docker.service - Docker Application Container Engine
>      Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
>      Active: activating (start) since Mon 2023-06-26 14:47:07 IDT; 3h 50min ago
> TriggeredBy: ● docker.socket
>        Docs: https://docs.docker.com
>    Main PID: 276555 (dockerd)
>      Memory: 44.2M
>      CGroup: /system.slice/docker.service
>              └─ 276555 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
> 
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.129383166+03:00" level=info msg="Graph migration to content-addressability took 0.00 se>
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.129666160+03:00" level=warning msg="Your kernel does not support cgroup cfs period"
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.129684117+03:00" level=warning msg="Your kernel does not support cgroup cfs quotas"
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.129697085+03:00" level=warning msg="Your kernel does not support cgroup rt period"
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.129711513+03:00" level=warning msg="Your kernel does not support cgroup rt runtime"
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.129720656+03:00" level=warning msg="Unable to find blkio cgroup in mounts"
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.129805617+03:00" level=warning msg="mountpoint for pids not found"
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.130199070+03:00" level=info msg="Loading containers: start."
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.132688568+03:00" level=warning msg="Running modprobe bridge br_netfilter failed with me>
> Jun 26 14:47:07 ppc-135-3-200-205 dockerd[276555]: time="2023-06-26T14:47:07.271014050+03:00" level=info msg="Default bridge (docker0) is assigned with an IP addres>
> 
> Python script which we used for bisect:
> 
> import subprocess
> import time
> import sys
> 
> 
> def run_command(cmd):
>     print('running:', cmd)
> 
>     p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
> 
>     try:
>         stdout, stderr = p.communicate(timeout=30)
> 
>     except subprocess.TimeoutExpired:
>         return True
> 
>     print(stdout.decode())
>     print(stderr.decode())
>     print('rc:', p.returncode)
> 
>     return False
> 
> 
> def main():
>     commands = [
>         'sudo systemctl stop docker',
>         'sudo systemctl status docker',
>         'sudo systemctl is-active docker',
>         'sudo systemctl start docker',
>         'sudo systemctl status docker',
>     ]
> 
>     for i in range(1000):
>         title = f'Try no. {i + 1}'
>         print('*' * 50, title, '*' * 50)
> 
>         for cmd in commands:
>             if run_command(cmd):
>                 print(f'Reproduced on try no. {i + 1}!')
>                 print(f'"{cmd}" is stuck!')
> 
>                 return 1
> 
>             print('\n')
>         time.sleep(30)
>     return 0
> 
> if __name__ == '__main__':
>     sys.exit(main())
> 
> Thanks