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authorJohannes Weiner <hannes@cmpxchg.org>2020-06-03 16:02:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-03 20:09:48 -0700
commitc843966c556d7370bb32e7319a6d164cb8c70ae2 (patch)
tree060e5e8cb49d2ee8bdde87836390b115ee87692d /mm
parent497a6c1b09902b22ceccc0f25ba4dd623e1ddb7d (diff)
mm: allow swappiness that prefers reclaiming anon over the file workingset
With the advent of fast random IO devices (SSDs, PMEM) and in-memory swap devices such as zswap, it's possible for swap to be much faster than filesystems, and for swapping to be preferable over thrashing filesystem caches. Allow setting swappiness - which defines the rough relative IO cost of cache misses between page cache and swap-backed pages - to reflect such situations by making the swap-preferred range configurable. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@surriel.com> Link: http://lkml.kernel.org/r/20200520232525.798933-4-hannes@cmpxchg.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/vmscan.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 1fa2417f7c2a..c711efc42cfc 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -161,7 +161,7 @@ struct scan_control {
#endif
/*
- * From 0 .. 100. Higher means more swappy.
+ * From 0 .. 200. Higher means more swappy.
*/
int vm_swappiness = 60;
/*