diff options
author | Dave Chinner <dchinner@redhat.com> | 2011-07-08 14:14:45 +1000 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-07-20 20:47:41 -0400 |
commit | 8ab47664d51a69ea79fe70bb07ca80664f74f76b (patch) | |
tree | a0cc73a909840edfb23b4b4490c39fd222cce0fa /fs | |
parent | 0e1fdafd93980eac62e778798549ce0f6073905c (diff) | |
download | linux-8ab47664d51a69ea79fe70bb07ca80664f74f76b.tar.bz2 |
vfs: increase shrinker batch size
Now that the per-sb shrinker is responsible for shrinking 2 or more
caches, increase the batch size to keep econmies of scale for
shrinking each cache. Increase the shrinker batch size to 1024
objects.
To allow for a large increase in batch size, add a conditional
reschedule to prune_icache_sb() so that we don't hold the LRU spin
lock for too long. This mirrors the behaviour of the
__shrink_dcache_sb(), and allows us to increase the batch size
without needing to worry about problems caused by long lock hold
times.
To ensure that filesystems using the per-sb shrinker callouts don't
cause problems, document that the object freeing method must
reschedule appropriately inside loops.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/super.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c index 5101f0544960..7943f04cb3a9 100644 --- a/fs/super.c +++ b/fs/super.c @@ -182,6 +182,7 @@ static struct super_block *alloc_super(struct file_system_type *type) s->s_shrink.seeks = DEFAULT_SEEKS; s->s_shrink.shrink = prune_super; + s->s_shrink.batch = 1024; } out: return s; |