diff options
| author |   Johannes Weiner <hannes@cmpxchg.org> | 2020-06-03 16:02:37 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-03 20:09:48 -0700 |
| commit | c843966c556d7370bb32e7319a6d164cb8c70ae2 (patch) | |
| tree | 060e5e8cb49d2ee8bdde87836390b115ee87692d /mm/vmscan.c | |
| parent | mm: keep separate anon and file statistics on page reclaim activity (diff) | |
| download | linux-dev-c843966c556d7370bb32e7319a6d164cb8c70ae2.tar.xz linux-dev-c843966c556d7370bb32e7319a6d164cb8c70ae2.zip | |
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/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 2 |
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; /* |