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Message-ID: <20070727085440.GT27237@ftp.linux.org.uk> Date: Fri, 27 Jul 2007 09:54:41 +0100 From: Al Viro <viro@....linux.org.uk> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Mike Galbraith <efault@....de>, Ingo Molnar <mingo@...e.hu>, Frank Kingswood <frank@...gswood-consulting.co.uk>, Andi Kleen <andi@...stfloor.org>, Nick Piggin <nickpiggin@...oo.com.au>, Ray Lee <ray-lk@...rabbit.org>, Jesper Juhl <jesper.juhl@...il.com>, ck list <ck@....kolivas.org>, Paul Jackson <pj@....com>, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: RFT: updatedb "morning after" problem [was: Re: -mm merge plans for 2.6.23] On Fri, Jul 27, 2007 at 01:47:49AM -0700, Andrew Morton wrote: > What I think is killing us here is the blockdev pagecache: the pagecache > which backs those directory entries and inodes. These pages get read > multiple times because they hold multiple directory entries and multiple > inodes. These multiple touches will put those pages onto the active list > so they stick around for a long time and everything else gets evicted. I wonder what happens if you try that on ext2. There we'd get directory contents in per-directory page cache, so the picture might change... - 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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