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Date: Fri, 3 May 2013 11:24:13 +0200 From: Pavel Machek <pavel@....cz> To: Colin Cross <ccross@...roid.com> Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>, arve@...roid.com, Tejun Heo <tj@...nel.org>, Oleg Nesterov <oleg@...hat.com> Subject: Re: [PATCH v2 02/10] freezer: skip waking up tasks with PF_FREEZER_SKIP set On Wed 2013-05-01 18:35:00, Colin Cross wrote: > Android goes through suspend/resume very often (every few seconds when > on a busy wifi network with the screen off), and a significant portion > of the energy used to go in and out of suspend is spent in the > freezer. If a task has called freezer_do_not_count(), don't bother > waking it up. If it happens to wake up later it will call > freezer_count() and immediately enter the refrigerator. > > Combined with patches to convert freezable helpers to use > freezer_do_not_count() and convert common sites where idle userspace > tasks are blocked to use the freezable helpers, this reduces the > time and energy required to suspend and resume. > > Signed-off-by: Colin Cross <ccross@...roid.com> Acked-by: Pavel Machek <pavel@....cz> -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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