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| author | Rusty Russell <rusty@rustcorp.com.au> | 2007-07-17 04:03:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 10:23:00 -0700 |
| commit | 8e1f936b73150f5095448a0fee6d4f30a1f9001d (patch) | |
| tree | 0996203e35c629e2ec243d128c7bd91ecd74d24a /fs/dcache.c | |
| parent | 5ad333eb66ff1e52a87639822ae088577669dcf9 (diff) | |
| download | lwn-8e1f936b73150f5095448a0fee6d4f30a1f9001d.tar.gz lwn-8e1f936b73150f5095448a0fee6d4f30a1f9001d.zip | |
mm: clean up and kernelify shrinker registration
I can never remember what the function to register to receive VM pressure
is called. I have to trace down from __alloc_pages() to find it.
It's called "set_shrinker()", and it needs Your Help.
1) Don't hide struct shrinker. It contains no magic.
2) Don't allocate "struct shrinker". It's not helpful.
3) Call them "register_shrinker" and "unregister_shrinker".
4) Call the function "shrink" not "shrinker".
5) Reduce the 17 lines of waffly comments to 13, but document it properly.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: David Chinner <dgc@sgi.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/dcache.c')
| -rw-r--r-- | fs/dcache.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index 0e73aa0a0e8b..cb9d05056b54 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -883,6 +883,11 @@ static int shrink_dcache_memory(int nr, gfp_t gfp_mask) return (dentry_stat.nr_unused / 100) * sysctl_vfs_cache_pressure; } +static struct shrinker dcache_shrinker = { + .shrink = shrink_dcache_memory, + .seeks = DEFAULT_SEEKS, +}; + /** * d_alloc - allocate a dcache entry * @parent: parent of entry to allocate @@ -2115,7 +2120,7 @@ static void __init dcache_init(unsigned long mempages) dentry_cache = KMEM_CACHE(dentry, SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|SLAB_MEM_SPREAD); - set_shrinker(DEFAULT_SEEKS, shrink_dcache_memory); + register_shrinker(&dcache_shrinker); /* Hash may have been set up in dcache_init_early */ if (!hashdist) |