Messages in this thread | | | Subject | Re: [patch] voluntary-preempt-2.6.8.1-P1 | From | Thomas Charbonnel <> | Date | Wed, 18 Aug 2004 14:22:09 +0200 |
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Ingo Molnar wrote : > * Ingo Molnar <mingo@elte.hu> wrote: > > > > Yes, Ingo identified an issue with copy_page_range, I don't think it's > > > fixed yet. See the voluntary-preempt-2.6.8.1-P0 thread. > > > > right, it's not fixed yet. It's not a trivial critical section - we > > are holding two locks and are mapping two atomic kmaps. > > fortunately it's easier than i thought - neither the source pmd nor the > target pmd can go away so we can simply drop the locks, reschedule, and > remap. Does the patch below (ontop of -P3) fix the copy_page_range() > latencies you are seeing? > > Ingo >
Ooops, sorry about my previous post, I had missed this one. It fixes the problem, thanks.
Thomas
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