Messages in this thread | | | Date | Tue, 25 Jan 2011 14:04:33 +1100 | Subject | Re: more dput lock contentions in 2.6.38-rc? | From | Nick Piggin <> |
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On Tue, Jan 25, 2011 at 1:46 PM, Shaohua Li <shaohua.li@intel.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
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