From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Kent Overstreet <kent.overstreet@linux.dev>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Ben Segall <bsegall@google.com>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Klara Modin <klarasmodin@gmail.com>, Mel Gorman <mgorman@suse.de>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Suren Baghdasaryan <surenb@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Valentin Schneider <vschneid@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>
Subject: Re: [PATCH] sched/task_struct: Move alloc_tag to the end of the struct.
Date: Sun, 30 Jun 2024 23:11:42 +0200 [thread overview]
Message-ID: <20240630211142.kZAs9f0p@linutronix.de> (raw)
In-Reply-To: <w2qopormdwuh54vropw6sgvadnivjnrgvmpurud2cu6nannfj3@xxrs2r6qt7zi>
On 2024-06-28 16:20:27 [-0400], Kent Overstreet wrote:
> > Kent, you said you didn't want it where it currently is. Fine. You said
> > you want it at the front next to `flags'. This isn't going to work since
> > there is no space left. You didn't make another suggestion or say how to
> > make room.
>
> It doesn't need to be on the exact same cacheline, just as near as you
> can get it.
the first possible thing would be somewhere after the scheduler.
However, what difference does it make if it s two cache lines later or
more? I don't understand the requirement "closer".
Sebastian
next prev parent reply other threads:[~2024-06-30 21:11 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-21 10:27 Sebastian Andrzej Siewior
2024-06-21 14:20 ` Kent Overstreet
2024-06-21 18:29 ` Sebastian Andrzej Siewior
2024-06-21 18:49 ` Kent Overstreet
2024-06-21 19:07 ` Sebastian Andrzej Siewior
2024-06-21 19:13 ` Kent Overstreet
2024-06-21 19:22 ` Sebastian Andrzej Siewior
2024-06-28 9:49 ` Sebastian Andrzej Siewior
2024-06-28 19:20 ` Andrew Morton
2024-06-28 19:35 ` Kent Overstreet
2024-06-28 19:55 ` Sebastian Andrzej Siewior
2024-06-28 20:20 ` Kent Overstreet
2024-06-30 21:11 ` Sebastian Andrzej Siewior [this message]
2024-06-30 21:23 ` Kent Overstreet
2024-07-01 8:05 ` Sebastian Andrzej Siewior
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