linux-kernel - Re: [RFC PATCH v3 00/15] context_tracking,x86: Defer some IPIs until a user->kernel transition

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Message-ID: <20241119114556.0949b562@gandalf.local.home>
Date: Tue, 19 Nov 2024 11:45:56 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Valentin Schneider <vschneid@...hat.com>
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Subject: Re: [RFC PATCH v3 00/15] context_tracking,x86: Defer some IPIs
 until a user->kernel transition

On Tue, 19 Nov 2024 16:34:47 +0100
Valentin Schneider <vschneid@...hat.com> 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.

-- Steve