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SubjectRe: [PATCH 0/8][RFC] IO latency/throughput fixes
On Mon, Apr 06, 2009 at 08:45:09AM -0700, Linus Torvalds wrote:
>
> With that request size limiting, my fsync pauses tend to be in the 250ms
> range, with a one 0.75s outlier in the last few minutes. I can definitely
> feel that quarter-second thing, and the .75s pause was a real stutter, but
> boy what a difference. I don't get the uncontrollable urge to kill that
> nasty background writer any more.

Cool! Maybe we can make things even better, but given where we are
at, this brings up an question: given Jens block latency patches
(thanks, Jens!), and the patches which add the flush on
replace-via-rename/replace-via-truncate for ext3 data=writeback,
should we make ext3 data=writeback the default for 2.6.30?

- Ted


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