On Sunday 02 April 2006 14:46, Nick Piggin wrote:
> The swap prefetching here, and the one in -mm AFAIKS still do not follow
> the lowmem reserve ratio correctly. This might explain why prefetching
> appears to help some people after updatedb swaps stuff out to make room
> for pagecache -- it may actually be dipping into lower zones when it
> shouldn't.
Curious. I was under the impression lowmem reserve only did anything if you
manually set it, and the users reporting on swap prefetch behaviour are not
the sort of users likely to do so. I'm happy to fix whatever the lowmem
reserve bug is but I doubt this bug is making swap prefetch behave better for
ordinary users. Well, whatever the case is I'll have another look at lowmem
reserve of course.
Cheers,
Con
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