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SubjectRe: -mm merge plans for 2.6.21
On Fri, 09 Feb 2007 11:54:29 +0200 Lenar Lõhmus <lenar@vision.ee> wrote:

> Hello,
>
> Andrew Morton wrote:
> > sched-add-above-background-load-function.patch
> > mm-implement-swap-prefetching.patch
> > mm-implement-swap-prefetching-vs-zvc-stuff.patch
> > mm-implement-swap-prefetching-vs-zvc-stuff-2.patch
> > mm-implement-swap-prefetching-use-ctl_unnumbered.patch
> > swap_prefetch-vs-zoned-counters.patch
> > add-include-linux-freezerh-and-move-definitions-from-prefetch.patch
> > zvc-support-nr_slab_reclaimable--nr_slab_unreclaimable-swap_prefetch.patch
> > reduce-max_nr_zones-swap_prefetch-remove-incorrect-use-of-zone_highmem.patch
> > sched-cleanup-remove-task_t-convert-to-struct-task_struct-prefetch.patch
> > numa-add-zone_to_nid-function-swap_prefetch.patch
> > remove-uses-of-kmem_cache_t-from-mm-and-include-linux-slabh-prefetch.patch
> >
> > Hold.
> Why hold?
>
> It's been shown this patchset really helps desktop users.

Has it? I don't think I've ever observed any benefits from it and I don't
think anyone has ever got down and worked out what its drawbacks might be,
and seen if they can be demonstrated in practice.

I also have vague memories of some serious-sounding review comments about
the code from Nick.

> Why keep it in -mm for so long?

I'm waiting to be shown that its benefits exceed its costs. Sometimes
that's hard.

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