Re: [RFC PATCH v3 00/15] context_tracking,x86: Defer some IPIs until a user->kernel transition
From: Valentin Schneider
Date: Tue Nov 19 2024 - 17:52:15 EST
On 19/11/24 11:45, Steven Rostedt wrote:
> On Tue, 19 Nov 2024 16:34:47 +0100
> Valentin Schneider <vschneid@xxxxxxxxxx> wrote:
>
>> Context
>> =======
>>
>> We've observed within Red Hat that isolated, NOHZ_FULL CPUs running a
>> pure-userspace application get regularly interrupted by IPIs sent from
>> housekeeping CPUs. Those IPIs are caused by activity on the housekeeping CPUs
>> leading to various on_each_cpu() calls, e.g.:
>
> FYI,
>
> Sending a patch series at the start of the merge window is likely going to
> get ignored.
>
> Care to resend after rc1 is released? Or at least ping about it.
>
Heh, I was so far down "stop rewriting changelogs for the Nth time, get it
in a decent shape and send it out" that I forgot about this "small little
detail". Thanks for the reminder.