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Date: Tue, 02 Apr 2013 17:00:12 +0200 From: Jiri Slaby <jslaby@...e.cz> To: Mel Gorman <mgorman@...e.de>, linux-ext4@...r.kernel.org CC: LKML <linux-kernel@...r.kernel.org>, Linux-MM <linux-mm@...ck.org> Subject: Re: Excessive stall times on ext4 in 3.9-rc2 On 04/02/2013 04:27 PM, Mel Gorman wrote: > I'm testing a page-reclaim-related series on my laptop that is partially > aimed at fixing long stalls when doing metadata-intensive operations on > low memory such as a git checkout. I've been running 3.9-rc2 with the > series applied but found that the interactive performance was awful even > when there was plenty of free memory. > > I activated a monitor from mmtests that logs when a process is stuck for > a long time in D state and found that there are a lot of stalls in ext4. > The report first states that processes have been stalled for a total of > 6498 seconds on IO which seems like a lot. Here is a breakdown of the > recorded events. Just a note that I am indeed using ext4 on the affected machine for all filesystems I have except for an efi partition... -- js suse labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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