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SubjectRe: Making diff(1) of linux kernels faster

On Wed, 17 Oct 2001, Andrea Arcangeli wrote:

> I think with directory readahead Marcelo meant a transparent kernel
> heuristic in the readdir path. ext2_get_page is completly synchronous
> and it's reading one page at time, that's bad but it can be improved
> transparently to userspace, just like we do with the files, and also
> like the old code was doing before the directory in pagecache IIRC.

Do the -ac kernels have the directory in pagecache patch? If not, it could
explain why the -ac kernel performed _much_ better for the
creat()/stat()/unlink() tests in bonnie++.

Cheers
Chris

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