linux-kernel - Re: [PATCH v2] pstore: Switch pmsg_lock to an rt

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 linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <167107574431.3579002.5090420152523491750.b4-ty@chromium.org>
Date:   Wed, 14 Dec 2022 19:42:26 -0800
From:   Kees Cook <keescook@...omium.org>
To:     jstultz@...gle.com, linux-kernel@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>, wvw@...gle.com,
        kernel-team@...roid.com, anton@...msg.org, connoro@...gle.com,
        Tony Luck <tony.luck@...el.com>, ccross@...roid.com,
        midaschieh@...gle.com
Subject: Re: [PATCH v2] pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion

On Wed, 14 Dec 2022 23:18:34 +0000, John Stultz wrote:
> Wei Wang reported seeing priority inversion caused latencies
> caused by contention on pmsg_lock, and suggested it be switched
> to a rt_mutex.
> 
> I was initially hesitant this would help, as the tasks in that
> trace all seemed to be SCHED_NORMAL, so the benefit would be
> limited to only nice boosting.
> 
> [...]

Applied to for-next/pstore, thanks!

[1/1] pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion
      https://git.kernel.org/kees/c/76d62f24db07

-- 
Kees Cook