lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sat, 05 Dec 2020 20:17:18 -0500
From:   Qian Cai <qcai@...hat.com>
To:     Valentin Schneider <valentin.schneider@....com>
Cc:     Peter Zijlstra <peterz@...radead.org>, tglx@...utronix.de,
        mingo@...nel.org, linux-kernel@...r.kernel.org,
        bigeasy@...utronix.de, qais.yousef@....com, swood@...hat.com,
        juri.lelli@...hat.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, vincent.donnefort@....com,
        tj@...nel.org, ouwen210@...mail.com
Subject: Re: [PATCH v4 11/19] sched/core: Make migrate disable and CPU
 hotplug cooperative

On Sat, 2020-12-05 at 18:37 +0000, Valentin Schneider wrote:
> From there I see:
> 
> [20798.166987][  T650] CPU127 nr_running=2
> [20798.171185][  T650]  p=migration/127
> [20798.175161][  T650]  p=kworker/127:1
> 
> so this might be another workqueue hurdle. This should be prevented by:
> 
>   06249738a41a ("workqueue: Manually break affinity on hotplug")

Well, since it was reproduced on the latest linux-next which has already
included the commit.

> Note that much earlier in your log, you have a softlockup on CPU127:
> 
> [   74.278367][  C127] watchdog: BUG: soft lockup - CPU#127 stuck for 23s!
> [swapper/0:1]

That's something separate. It was there all the time.

https://lore.kernel.org/linux-acpi/20200929183444.25079-1-cai@redhat.com/

Powered by blists - more mailing lists