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Open Source and information security mailing list archives
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Date: Sat, 06 Aug 2022 10:30:53 +0200 From: Thomas Gleixner <tglx@...utronix.de> To: Yury Norov <yury.norov@...il.com>, linux-kernel@...r.kernel.org, Alexander Lobakin <alexandr.lobakin@...el.com>, Alexei Starovoitov <ast@...nel.org>, Alexey Klimov <aklimov@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Andrii Nakryiko <andrii@...nel.org>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Ben Segall <bsegall@...gle.com>, Christoph Lameter <cl@...ux.com>, Dan Williams <dan.j.williams@...el.com>, Daniel Borkmann <daniel@...earbox.net>, Daniel Bristot de Oliveira <bristot@...hat.com>, Dennis Zhou <dennis@...nel.org>, Dietmar Eggemann <dietmar.eggemann@....com>, Eric Dumazet <edumazet@...gle.com>, Frederic Weisbecker <fweisbec@...il.com>, Guenter Roeck <linux@...ck-us.net>, Ingo Molnar <mingo@...hat.com>, Isabella Basso <isabbasso@...eup.net>, John Fastabend <john.fastabend@...il.com>, Josh Poimboeuf <jpoimboe@...nel.org>, Juergen Gross <jgross@...e.com>, Juri Lelli <juri.lelli@...hat.com>, KP Singh <kpsingh@...nel.org>, Kees Cook <keescook@...omium.org>, Martin KaFai Lau <kafai@...com>, Mel Gorman <mgorman@...e.de>, Miroslav Benes <mbenes@...e.cz>, Nathan Chancellor <nathan@...nel.org>, "Paul E . McKenney" <paulmck@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Randy Dunlap <rdunlap@...radead.org>, Rasmus Villemoes <linux@...musvillemoes.dk>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, Song Liu <songliubraving@...com>, Steven Rostedt <rostedt@...dmis.org>, Tejun Heo <tj@...nel.org>, Valentin Schneider <vschneid@...hat.com>, Vincent Guittot <vincent.guittot@...aro.org>, Vlastimil Babka <vbabka@...e.cz>, Yonghong Song <yhs@...com>, Yury Norov <yury.norov@...il.com>, linux-mm@...ck.org, netdev@...r.kernel.org, bpf@...r.kernel.org Subject: Re: [PATCH 11/16] time: optimize tick_check_preferred() On Mon, Jul 18 2022 at 12:28, Yury Norov wrote: > tick_check_preferred() calls cpumask_equal() even if > curdev->cpumask == newdev->cpumask. Fix it. What's to fix here? It's a pointless operation in a slow path and all your "fix' is doing is to make the code larger. Thanks, tglx
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