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Message-ID: <20150917142144.GI3604@twins.programming.kicks-ass.net> Date: Thu, 17 Sep 2015 16:21:44 +0200 From: Peter Zijlstra <peterz@...radead.org> To: Hiroshi Shimamoto <h-shimamoto@...jp.nec.com> Cc: Ingo Molnar <mingo@...hat.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Frederic Weisbecker <fweisbec@...il.com> Subject: Re: [PATCH] cputime: fix invalid gtime On Thu, Sep 03, 2015 at 12:45:50AM +0000, Hiroshi Shimamoto wrote: > From: Hiroshi Shimamoto <h-shimamoto@...jp.nec.com> > > /proc/stats shows invalid gtime when the thread is running in guest. Why is this a problem? > When vtime accounting is not enabled, we cannot get a valid delta. > Just return gtime when vtime accounting is not enabled in task_gtime(). But isn't other stuff then also broken, like fetch_task_cputime(). Tell me more about why you think your patch is the right one. > Before > 10987 (qemu-kvm) S 1 10923 10923 0 -1 138428608 7521 0 90 0 3776 460 0 0 20 0 24 0 11960 8090398720 151288 18446744073709551615 1 1 0 0 0 0 2147220671 4096 25155 18446744073709551615 0 0 -1 9 0 0 0 3554 0 0 0 0 0 0 0 0 0 It would have been helpful if you'd used a small script to take out the right column. As is I've no clue which field to look at. -- 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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