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Date: Thu, 8 Nov 2007 11:38:11 +1100 From: David Chinner <dgc@....com> To: Torsten Kaiser <just.for.lkml@...glemail.com> Cc: David Chinner <dgc@....com>, Fengguang Wu <wfg@...l.ustc.edu.cn>, Peter Zijlstra <peterz@...radead.org>, Maxim Levitsky <maximlevitsky@...il.com>, linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, linux-fsdevel@...r.kernel.org Subject: Re: writeout stalls in current -git On Wed, Nov 07, 2007 at 08:15:06AM +0100, Torsten Kaiser wrote: > On 11/7/07, David Chinner <dgc@....com> wrote: > > Ok, so it's not synchronous writes that we are doing - we're just > > submitting bio's tagged as WRITE_SYNC to get the I/O issued quickly. > > The "synchronous" nature appears to be coming from higher level > > locking when reclaiming inodes (on the flush lock). It appears that > > inode write clustering is failing completely so we are writing the > > same block multiple times i.e. once for each inode in the cluster we > > have to write. > > Works for me. The only remaining stalls are sub second and look > completely valid, considering the amount of files being removed. .... > Tested-by: Torsten Kaiser <just.for.lkml@...glemail.com> Great - thanks for reporting the problem and testing the fix. Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group - 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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