linux-kernel - [PATCH 0/4] sched: Fix hot-unplug regressions

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Tue, 12 Jan 2021 15:43:44 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     mingo@...nel.org, tglx@...utronix.de
Cc:     linux-kernel@...r.kernel.org, jiangshanlai@...il.com,
        valentin.schneider@....com, cai@...hat.com,
        vincent.donnefort@....com, decui@...rosoft.com, paulmck@...nel.org,
        vincent.guittot@...aro.org, rostedt@...dmis.org, tj@...nel.org,
        peterz@...radead.org
Subject: [PATCH 0/4] sched: Fix hot-unplug regressions

Hi,

These 4 patches are the simplest means (barring a revert) of fixing the CPU
hot-unplug problems introduced by commit:

  1cf12e08bc4d ("sched/hotplug: Consolidate task migration on CPU unplug")

Testing here, any by Paul, indicate they survive a pounding.

They restore the previous behaviour of forced affinity breaking for the class
of kernel threads that happen to have single CPU affinity, but are not strictly
a per-cpu kthread.