From: Thomas Gleixner <tglx@linutronix.de>
To: Marcelo Tosatti <mtosatti@redhat.com>,
Frederic Weisbecker <frederic@kernel.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] sched/idle: disable tick in idle=poll idle entry
Date: Sat, 01 Nov 2025 20:30:34 +0100 [thread overview]
Message-ID: <87bjlly2hx.ffs@tglx> (raw)
In-Reply-To: <aQJWWIDMMUxqDxnR@tpad>
On Wed, Oct 29 2025 at 15:00, Marcelo Tosatti wrote:
> Commit a5183862e76fdc25f36b39c2489b816a5c66e2e5
> ("tick/nohz: Conditionally restart tick on idle exit") allows
> a nohz_full CPU to enter idle and return from it with the
> scheduler tick disabled (since the tick might be undesired noise).
>
> The idle=poll case still unconditionally restarts the tick when entering
> idle.
>
> To reduce the noise for that case as well, stop the tick when entering
> idle, for the idle=poll case.
>
> Change tick_nohz_full_kick_cpu to set NEED_RESCHED bit, to handle the
> case where a new timer is added from an interrupt. This breaks out of
> cpu_idle_poll and rearms the timer if necessary.
>
> ---
ERROR: Missing Signed-off-by: line by nominal patch author 'Marcelo Tosatti <mtosatti@redhat.com>'
You've not started doing kernel development three days ago, right?
prev parent reply other threads:[~2025-11-01 19:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-29 18:00 [PATCH v2] sched/idle: disable tick in idle=poll idle entry Marcelo Tosatti
2025-10-29 18:01 ` Marcelo Tosatti
2025-10-30 16:06 ` Frederic Weisbecker
2025-11-03 11:30 ` Marcelo Tosatti
2025-12-10 13:32 ` Frederic Weisbecker
2025-11-01 19:30 ` Thomas Gleixner [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87bjlly2hx.ffs@tglx \
--to=tglx@linutronix.de \
--cc=frederic@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mtosatti@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox