Re: [PATCH v5] x86/split_lock: fix delayed detection enabling

[Ingo Molnar]

* Maksim Davydov <davydov-max@xxxxxxxxxxxxxx> wrote:

> If the warn mode with disabled mitigation mode is used, then on each
> CPU where the split lock occurred detection will be disabled in order to
> make progress and delayed work will be scheduled, which then will enable
> detection back. Now it turns out that all CPUs use one global delayed
> work structure. This leads to the fact that if a split lock occurs on
> several CPUs at the same time (within 2 jiffies), only one CPU will
> schedule delayed work, but the rest will not. The return value of
> schedule_delayed_work_on() would have shown this, but it is not checked
> in the code.

So we already merged the previous version into the locking tree ~10 
days ago and it's all in -next already:

  c929d08df8be ("x86/split_lock: Fix the delayed detection logic")

  https://web.git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=c929d08df8bee855528b9d15b853c892c54e1eee

Is there anything new in your -v5 patch, other than undoing all the 
changelog cleanups I did for the previous version? ;-)

Thanks,

	Ingo