* Lee Revell <[EMAIL PROTECTED]> wrote:
> I did the same quick latency tests with 2.6.12-rc1 that I posted about
> for 2.6.11 a few weeks ago.
>
> 2.6.12-rc1 is significantly better than 2.6.11. Running JACK at 64
> frames (1.3 ms) works very well. I was not able to produce xruns even
> with "dbench 64", which slows the system to a crawl. With 2.6.11, I
> could easily produce xruns with much lighter loads.
>
> It would appear that the latency issues related to the 4 level page
> tables merge have been resolved.
great! The change in question is most likely the copy_page_range() fix
that Hugh resurrected:
ChangeSet 1.2037, 2005/03/08 09:26:46-08:00, [EMAIL PROTECTED]
[PATCH] copy_pte_range latency fix
Ingo's patch to reduce scheduling latencies, by checking for lockbreak
in
copy_page_range, was in the -VP and -mm patchsets some months ago; but
got
preempted by the 4level rework, and not reinstated since. Restore it now
in copy_pte_range - which mercifully makes it easier.
are the ext3 related latencies are gone as well - or are you working it
around by not using data=ordered?
Ingo
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