Messages in this thread | | | Date | Fri, 14 Jun 2013 20:10:34 +0900 | From | Minchan Kim <> | Subject | Re: [PATCH] mm: vmscan: remove redundant querying to shrinker |
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Hello,
On Fri, Jun 14, 2013 at 07:07:51PM +0900, Heesub Shin wrote: > shrink_slab() queries each slab cache to get the number of > elements in it. In most cases such queries are cheap but, > on some caches. For example, Android low-memory-killer, > which is operates as a slab shrinker, does relatively > long calculation once invoked and it is quite expensive.
LMK as shrinker is really bad, which everybody didn't want when we reviewed it a few years ago so that's a one of reason LMK couldn't be promoted to mainline yet. So your motivation is already not atrractive. ;-)
> > This patch removes redundant queries to shrinker function > in the loop of shrink batch.
I didn't review the patch and others don't want it, I guess. Because slab shrink is under construction and many patches were already merged into mmtom. Please look at latest mmotm tree.
git://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git
If you concern is still in there and it's really big concern of MM we should take care, NOT LMK, plese, resend it.
Thanks.
-- Kind regards, Minchan Kim
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