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SubjectRe: [PATCH 1/2] mm,vmscan: Kill global shrinker lock.
On Wed, Nov 15, 2017 at 09:56:02AM +0900, Minchan Kim wrote:
> @@ -498,6 +498,14 @@ static unsigned long shrink_slab(gfp_t gfp_mask, int nid,
> sc.nid = 0;
>
> freed += do_shrink_slab(&sc, shrinker, nr_scanned, nr_eligible);
> + /*
> + * bail out if someone want to register a new shrinker to prevent
> + * long time stall by parallel ongoing shrinking.
> + */
> + if (rwsem_is_contended(&shrinker_rwsem)) {
> + freed = 1;
> + break;
> + }
> }

When you send the formal version, please include

Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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