Messages in this thread | | | Date | Tue, 24 Aug 2004 12:13:53 +0200 | From | Jens Axboe <> | Subject | Re: Kernel 2.6.8.1: swap storm of death - CFQ scheduler=culprit |
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On Tue, Aug 24 2004, Jens Axboe wrote: > On Mon, Aug 23 2004, Karl Vogel wrote: > > > > Jens, is this huge amount of bio/biovec's allocations > > > expected with CFQ? Its really really bad. > > > > > > Nope, it's not by design :-) > > > > > > A test case would be nice, then I'll fix it as soon as possible. But > > > please retest with 2.6.8.1 marcelo, 2.6.8-rc4 is missing an important > > > fix to ll_rw_blk that can easily cause this. The first report is for > > > 2.6.8.1, so I'm more puzzled on that. > > > > I tried with 2.6.8.1 and 2.6.8.1-mm4, both had the problem. If there > > is anything extra I need to try/record, just shoot! > > > > Original post with testcase + stats: > > http://article.gmane.org/gmane.linux.kernel/228156 > > 2.6.8.1-mm4 clean does not reproduce the problem. Marcelo, your > 2.6.8-rc4 report is not valid due to the fixed problem related to that > in CFQ already. I'd still like for you to retest with 2.6.8.1. > > So I'm trying 2.6.8.1 with voluntary preempt applied now, the bug could > be related to that.
Oh, and please do also do a sysrq-t from a hung box and save the output.
-- Jens Axboe
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