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Date: Tue, 25 Jan 2011 14:04:33 +1100 From: Nick Piggin <npiggin@...il.com> To: Shaohua Li <shaohua.li@...el.com> Cc: "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>, lkml <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Nick Piggin <npiggin@...nel.dk>, "Chen, Tim C" <tim.c.chen@...el.com> Subject: Re: more dput lock contentions in 2.6.38-rc? On Tue, Jan 25, 2011 at 1:46 PM, Shaohua Li <shaohua.li@...el.com> wrote: > On Tue, Jan 25, 2011 at 10:09:48AM +0800, Nick Piggin wrote: >> What does an actual snippet from perf with callgraphs look like? > here is another perf report OK well there a lot of hits reading /proc/mounts and statfs, but still more that appear to be coming from fstat/open/unlink/rename. It looks like they are coming from dropping rcu walk along the path rather than a full restart. So we will have to see where those are coming from. My stats patch will help with that. Thanks, Nick -- 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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