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SubjectRe: 2.4.23aa2 (bugfixes and important VM improvements for the high end)
Rik van Riel <riel@redhat.com> wrote:
>
> > Current 2.6 will write out nr_inactive>>DEF_PRIORITY pages,
>
> That may be a bit much on extremely huge systems, but that should
> require no more than a little tweaking to fix. Certainly no code
> changes should be needed ...

hmm, with 4 million pages on the inactive list that's 1000 pages. It might
be OK.

Bear in mind that under usual circumstances the direct-reclaim path will
refuse to block on request queue exhaustion so we might end up just
scanning past some dirty pages without starting I/O against them at all.
End result: some jumbling up of the LRU order. I suspect that's a
second-order problem though. But hey, if we have a testcase, we can fix it!
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