Messages in this thread | | | Date | Fri, 20 Aug 2004 10:13:19 +0200 | From | Ingo Molnar <> | Subject | Re: [patch] voluntary-preempt-2.6.8.1-P4 |
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* Lee Revell <rlrevell@joe-job.com> wrote:
> > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P4 > > I think I am seeing those weird ~1 ms latencies still (actually I am not > sure I saw before now): > > http://krustophenia.net/testresults.php?dataset=2.6.8.1-P4#/var/www/2.6.8.1-P4/kswapd_latency_trace.txt
this is a 9 msec latency in fact. I know what's going on - it's the get_swap_page() locking - i looked at it once already but there's no immediate silver arrow. As we allocate more and more swap entries the longer the scan gets.
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