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Date: Fri, 30 Oct 2020 09:41:12 +0100 From: Peter Zijlstra <peterz@...radead.org> To: Joel Fernandes <joel@...lfernandes.org> Cc: Nishanth Aravamudan <naravamudan@...italocean.com>, Julien Desfossez <jdesfossez@...italocean.com>, Tim Chen <tim.c.chen@...ux.intel.com>, Vineeth Pillai <viremana@...ux.microsoft.com>, Aaron Lu <aaron.lwe@...il.com>, Aubrey Li <aubrey.intel@...il.com>, Thomas Glexiner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>, Kees Cook <keescook@...omium.org>, Greg Kerr <kerrnel@...gle.com>, Phil Auld <pauld@...hat.com>, Valentin Schneider <valentin.schneider@....com>, Mel Gorman <mgorman@...hsingularity.net>, Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>, Paolo Bonzini <pbonzini@...hat.com>, vineeth@...byteword.org, Chen Yu <yu.c.chen@...el.com>, Christian Brauner <christian.brauner@...ntu.com>, Agata Gruza <agata.gruza@...el.com>, Antonio Gomez Iglesias <antonio.gomez.iglesias@...el.com>, graf@...zon.com, konrad.wilk@...cle.com, Dario Faggioli <dfaggioli@...e.com>, Paul Turner <pjt@...gle.com>, Steven Rostedt <rostedt@...dmis.org>, Patrick Bellasi <derkling@...gle.com>, benbjiang(蒋彪) <benbjiang@...cent.com>, Alexandre Chartre <alexandre.chartre@...cle.com>, James.Bottomley@...senpartnership.com, OWeisse@...ch.edu, Dhaval Giani <dhaval.giani@...cle.com>, Junaid Shahid <junaids@...gle.com>, Jesse Barnes <jsbarnes@...gle.com>, "Hyser,Chris" <chris.hyser@...cle.com>, Aubrey Li <aubrey.li@...ux.intel.com>, Tim Chen <tim.c.chen@...el.com> Subject: Re: [PATCH v8 -tip 08/26] sched/fair: Snapshot the min_vruntime of CPUs on force idle On Thu, Oct 29, 2020 at 10:42:29PM -0400, Joel Fernandes wrote: > Forgot to ask, do you also need to do the task_vruntime_update() for > the unconstrained pick? Humm.. interesting case. Yes, however... since in that case the picks aren't synchronized it's a wee bit dodgy. I'll throw it on the pile together with SMT4. Also, I'm still hoping you can make this form work: https://lkml.kernel.org/r/20201026093131.GF2628@hirez.programming.kicks-ass.net (note that the put_prev_task() needs an additional rq argument) That's both simpler code and faster.
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