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SubjectRe: stochastic fair queueing in the elevator [Re: [BENCHMARK] 2.4.20-ck3 / aa / rmap with contest]
Andrew Morton wrote:

>Andrea Arcangeli <andrea@suse.de> wrote:
>
>
>>BTW, one thing that should definitely do readhaead and it's
>>not doing that (at least in 2.4) is the readdir path, again to generate
>>big commands, no matter the seeks. It was lost with the directory in
>>pagecache.
>>
>>
>
>Yes. But ext3 is still doing directory readahead, and I have never
>noticed it gaining any particular benefit over ext2 from it.
>
>And neither fs performs inode table readahead.
>-
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>
>
reiser4 does directory readahead. It gets a lot of gain from it.

--
Hans


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