diff options
| author | Liam Mark <lmark@codeaurora.org> | 2014-11-25 14:43:42 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 11:03:33 -0700 |
| commit | 8a94faffd0a430d83c2d9d62c2d4c9b6070f6323 (patch) | |
| tree | ca5b1afefe47903b5481b96e41da286eac00c1f0 /mm/vmscan.c | |
| parent | 747b0dceaea4cecff7a3adad6c657a656c9aeb43 (diff) | |
mm: vmscan: support complete shrinker reclaim
Ensure that shrinkers are given the option to completely drop
their caches even when their caches are smaller than the batch size.
This change helps improve memory headroom by ensuring that under
significant memory pressure shrinkers can drop all of their caches.
This change only attempts to more aggressively call the shrinkers
during background memory reclaim, inorder to avoid hurting the
perforamnce of direct memory reclaim.
Change-Id: I8dbc29c054add639e4810e36fd2c8a063e5c52f3
Signed-off-by: Liam Mark <lmark@codeaurora.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 9f844e8b92df..65c6a720d8ec 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -320,6 +320,10 @@ static unsigned long do_shrink_slab(struct shrink_control *shrinkctl, int nid = shrinkctl->nid; long batch_size = shrinker->batch ? shrinker->batch : SHRINK_BATCH; + long min_cache_size = batch_size; + + if (current_is_kswapd()) + min_cache_size = 0; freeable = shrinker->count_objects(shrinker, shrinkctl); if (freeable == 0) @@ -385,7 +389,7 @@ static unsigned long do_shrink_slab(struct shrink_control *shrinkctl, * scanning at high prio and therefore should try to reclaim as much as * possible. */ - while (total_scan >= batch_size || + while (total_scan > min_cache_size || total_scan >= freeable) { unsigned long ret; unsigned long nr_to_scan = min(batch_size, total_scan); |