Re: RFT: updatedb "morning after" problem [was: Re: -mm merge plans for 2.6.23]

[Al Viro <viro@ftp.linux.org.uk>]

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...
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