From: Peter Zijlstra <peterz@infradead.org>
To: John Stultz <jstultz@google.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Juri Lelli <juri.lelli@redhat.com>,
Valentin Schneider <valentin.schneider@arm.com>,
Connor O'Brien <connoro@google.com>,
Joel Fernandes <joelagnelf@nvidia.com>,
Qais Yousef <qyousef@layalina.io>, Ingo Molnar <mingo@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Valentin Schneider <vschneid@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>,
Zimuzo Ezeozue <zezeozue@google.com>,
Will Deacon <will@kernel.org>, Waiman Long <longman@redhat.com>,
Boqun Feng <boqun.feng@gmail.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
Metin Kaya <Metin.Kaya@arm.com>,
Xuewen Yan <xuewen.yan94@gmail.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Suleiman Souhlal <suleiman@google.com>,
kuyo chang <kuyo.chang@mediatek.com>, hupu <hupu.gm@gmail.com>,
kernel-team@android.com
Subject: Re: [PATCH v29 7/9] sched: Add blocked_donor link to task for smarter mutex handoffs
Date: Tue, 19 May 2026 16:46:23 +0200 [thread overview]
Message-ID: <20260519144623.GA3493195@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <20260519143238.GB2934902@noisy.programming.kicks-ass.net>
On Tue, May 19, 2026 at 04:32:38PM +0200, Peter Zijlstra wrote:
> Notably, blocked_donor is a back link that is specific to the current
> schedule() call / donor pick cycle.
>
> This means it is stable when either: holding rq->lock or disabling
> preemption -- because when preemption is disabled.
... you cannot schedule().
next prev parent reply other threads:[~2026-05-19 14:46 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-12 2:56 [PATCH v29 0/9] Optimized Donor Migration for Proxy Execution John Stultz
2026-05-12 2:56 ` [PATCH v29 1/9] sched: Rework pick_next_task() and prev_balance() to avoid stale prev references John Stultz
2026-05-19 10:32 ` Peter Zijlstra
2026-05-20 2:45 ` John Stultz
2026-05-20 9:43 ` Peter Zijlstra
2026-06-04 18:45 ` [tip: sched/core] sched: Rework " tip-bot2 for John Stultz
2026-05-12 2:56 ` [PATCH v29 2/9] sched: deadline: Add some helper variables to cleanup deadline logic John Stultz
2026-06-04 18:45 ` [tip: sched/core] " tip-bot2 for John Stultz
2026-05-12 2:56 ` [PATCH v29 3/9] sched: deadline: Add dl_rq->curr pointer to address issues with Proxy Exec John Stultz
2026-06-04 18:45 ` [tip: sched/core] " tip-bot2 for John Stultz
2026-05-12 2:56 ` [PATCH v29 4/9] sched: Rework block_task so it can be directly called John Stultz
2026-06-04 18:45 ` [tip: sched/core] " tip-bot2 for John Stultz
2026-05-12 2:56 ` [PATCH v29 5/9] sched: Have try_to_wake_up() handle return-migration for PROXY_WAKING case John Stultz
2026-05-22 11:30 ` Peter Zijlstra
2026-05-22 11:35 ` Peter Zijlstra
2026-06-04 18:45 ` [tip: sched/core] " tip-bot2 for John Stultz
2026-05-12 2:56 ` [PATCH v29 6/9] sched: Add is_blocked task flag John Stultz
2026-06-04 18:45 ` [tip: sched/core] " tip-bot2 for John Stultz
2026-05-12 2:56 ` [PATCH v29 7/9] sched: Add blocked_donor link to task for smarter mutex handoffs John Stultz
2026-05-19 14:32 ` Peter Zijlstra
2026-05-19 14:46 ` Peter Zijlstra [this message]
2026-05-19 15:46 ` K Prateek Nayak
2026-05-20 18:10 ` John Stultz
2026-05-22 9:50 ` Peter Zijlstra
2026-05-20 18:09 ` John Stultz
2026-06-04 18:45 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2026-05-12 2:56 ` [PATCH v29 8/9] sched: Break out core of attach_tasks() helper into sched.h John Stultz
2026-05-12 2:56 ` [PATCH v29 9/9] sched: Migrate whole chain in proxy_migrate_task() John Stultz
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=20260519144623.GA3493195@noisy.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=Metin.Kaya@arm.com \
--cc=boqun.feng@gmail.com \
--cc=bsegall@google.com \
--cc=connoro@google.com \
--cc=daniel.lezcano@linaro.org \
--cc=dietmar.eggemann@arm.com \
--cc=hupu.gm@gmail.com \
--cc=joelagnelf@nvidia.com \
--cc=jstultz@google.com \
--cc=juri.lelli@redhat.com \
--cc=kernel-team@android.com \
--cc=kprateek.nayak@amd.com \
--cc=kuyo.chang@mediatek.com \
--cc=linux-kernel@vger.kernel.org \
--cc=longman@redhat.com \
--cc=mingo@redhat.com \
--cc=paulmck@kernel.org \
--cc=qyousef@layalina.io \
--cc=rostedt@goodmis.org \
--cc=suleiman@google.com \
--cc=tglx@linutronix.de \
--cc=valentin.schneider@arm.com \
--cc=vincent.guittot@linaro.org \
--cc=vschneid@redhat.com \
--cc=will@kernel.org \
--cc=xuewen.yan94@gmail.com \
--cc=zezeozue@google.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
Powered by JetHome