Messages in this thread | | | Date | Thu, 3 May 2007 11:37:56 +0100 | From | Christoph Hellwig <> | Subject | Re: 2.6.22 -mm merge plans -- vm bugfixes |
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On Thu, May 03, 2007 at 11:32:23AM +1000, Nick Piggin wrote: > The attached patch gets performance up a bit by avoiding some > barriers and some cachelines: > > G5 > pagefault fork exec > 2.6.21 1.49-1.51 164.6-170.8 741.8-760.3 > +patch 1.71-1.73 175.2-180.8 780.5-794.2 > +patch2 1.61-1.63 169.8-175.0 748.6-757.0 > > So that brings the fork/exec hits down to much less than 5%, and > would likely speed up other things that lock the page, like write > or page reclaim.
Is that every fork/exec or just under certain cicumstances? A 5% regression on every fork/exec is not acceptable.
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