Messages in this thread | | | Date | Sat, 16 Jul 2011 19:04:28 -0600 | From | Matthew Wilcox <> | Subject | Re: vfsmount lock issues on very large ppc64 box |
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On Sun, Jul 17, 2011 at 10:50:27AM +1000, Anton Blanchard wrote: > Looking closer, all of these calls are in pipefs and sockfs. > Since we never mount either filesystem they never get a long term > reference and we always end up in the very slow write brlock path > that takes a lock for each online CPU. > > Here is a quick hack that takes a long term reference on pipefs > and sockfs which fixes the problem. Any thoughts on how we should > fix it properly?
I know Tim and Andi have been looking into this ... I forget what their fix was though.
-- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step."
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