From linux-kernel Tue Aug 24 10:03:43 2004 From: Jens Axboe Date: Tue, 24 Aug 2004 10:03:43 +0000 To: linux-kernel Subject: Re: Kernel 2.6.8.1: swap storm of death - CFQ scheduler=culprit Message-Id: <20040824100342.GI2355 () suse ! de> X-MARC-Message: https://marc.info/?l=linux-kernel&m=109334215825740 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. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/