fs: convert inode and dentry shrinking to be node aware

Now that the shrinker is passing a node in the scan control structure, we
can pass this to the the generic LRU list code to isolate reclaim to the
lists on matching nodes.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/dcache.c b/fs/dcache.c
index 7da44d3514ec5fb0af31852654a1eff8ae059164..53f499b530df85144008ac44ce3be8fbff3db59c 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -891,6 +891,7 @@ dentry_lru_isolate(struct list_head *item, spinlock_t *lru_lock, void *arg)
  * prune_dcache_sb - shrink the dcache
  * @sb: superblock
  * @nr_to_scan : number of entries to try to free
+ * @nid: which node to scan for freeable entities
  *
  * Attempt to shrink the superblock dcache LRU by @nr_to_scan entries. This is
  * done when we need more memory an called from the superblock shrinker
@@ -899,13 +900,14 @@ dentry_lru_isolate(struct list_head *item, spinlock_t *lru_lock, void *arg)
  * This function may fail to free any resources if all the dentries are in
  * use.
  */
-long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan)
+long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan,
+                    int nid)
 {
        LIST_HEAD(dispose);
        long freed;
 
-       freed = list_lru_walk(&sb->s_dentry_lru, dentry_lru_isolate,
-                             &dispose, nr_to_scan);
+       freed = list_lru_walk_node(&sb->s_dentry_lru, nid, dentry_lru_isolate,
+                                      &dispose, &nr_to_scan);
        shrink_dentry_list(&dispose);
        return freed;
 }

diff --git a/fs/inode.c b/fs/inode.c
index 5d85521e3273dfc3a405f1808724c14e14fac591..00b804e000a4b0050e20e08e802606b9edbd74a6 100644 (file)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -746,13 +746,14 @@ inode_lru_isolate(struct list_head *item, spinlock_t *lru_lock, void *arg)
  * to trim from the LRU. Inodes to be freed are moved to a temporary list and
  * then are freed outside inode_lock by dispose_list().
  */
-long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan)
+long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan,
+                    int nid)
 {
        LIST_HEAD(freeable);
        long freed;
 
-       freed = list_lru_walk(&sb->s_inode_lru, inode_lru_isolate,
-                                               &freeable, nr_to_scan);
+       freed = list_lru_walk_node(&sb->s_inode_lru, nid, inode_lru_isolate,
+                                      &freeable, &nr_to_scan);
        dispose_list(&freeable);
        return freed;
 }

diff --git a/fs/internal.h b/fs/internal.h
index ea43c898fe3f2149736ee5971733049651dfa96a..8902d56448c3fe887065a233b5a8b10dc01ad37d 100644 (file)
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -110,7 +110,8 @@ extern int open_check_o_direct(struct file *f);
  * inode.c
  */
 extern spinlock_t inode_sb_list_lock;
-extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan);
+extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan,
+                           int nid);
 extern void inode_add_lru(struct inode *inode);
 
 /*
@@ -126,7 +127,8 @@ extern int invalidate_inodes(struct super_block *, bool);
  * dcache.c
  */
 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
-extern long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan);
+extern long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan,
+                           int nid);
 
 /*
  * read_write.c

diff --git a/fs/super.c b/fs/super.c
index 21201f91548cbbf431812b740266f51f665ea8e5..ca41919df1de3df355a09bbf3a156fe0b7c6573d 100644 (file)
--- a/fs/super.c
+++ b/fs/super.c
@@ -76,10 +76,10 @@ static unsigned long super_cache_scan(struct shrinker *shrink,
                return SHRINK_STOP;
 
        if (sb->s_op && sb->s_op->nr_cached_objects)
-               fs_objects = sb->s_op->nr_cached_objects(sb);
+               fs_objects = sb->s_op->nr_cached_objects(sb, sc->nid);
 
-       inodes = list_lru_count(&sb->s_inode_lru);
-       dentries = list_lru_count(&sb->s_dentry_lru);
+       inodes = list_lru_count_node(&sb->s_inode_lru, sc->nid);
+       dentries = list_lru_count_node(&sb->s_dentry_lru, sc->nid);
        total_objects = dentries + inodes + fs_objects + 1;
 
        /* proportion the scan between the caches */
@@ -90,13 +90,14 @@ static unsigned long super_cache_scan(struct shrinker *shrink,
         * prune the dcache first as the icache is pinned by it, then
         * prune the icache, followed by the filesystem specific caches
         */
-       freed = prune_dcache_sb(sb, dentries);
-       freed += prune_icache_sb(sb, inodes);
+       freed = prune_dcache_sb(sb, dentries, sc->nid);
+       freed += prune_icache_sb(sb, inodes, sc->nid);
 
        if (fs_objects) {
                fs_objects = mult_frac(sc->nr_to_scan, fs_objects,
                                                                total_objects);
-               freed += sb->s_op->free_cached_objects(sb, fs_objects);
+               freed += sb->s_op->free_cached_objects(sb, fs_objects,
+                                                      sc->nid);
        }
 
        drop_super(sb);
@@ -115,10 +116,13 @@ static unsigned long super_cache_count(struct shrinker *shrink,
                return 0;
 
        if (sb->s_op && sb->s_op->nr_cached_objects)
-               total_objects = sb->s_op->nr_cached_objects(sb);
+               total_objects = sb->s_op->nr_cached_objects(sb,
+                                                sc->nid);
 
-       total_objects += list_lru_count(&sb->s_dentry_lru);
-       total_objects += list_lru_count(&sb->s_inode_lru);
+       total_objects += list_lru_count_node(&sb->s_dentry_lru,
+                                                sc->nid);
+       total_objects += list_lru_count_node(&sb->s_inode_lru,
+                                                sc->nid);
 
        total_objects = vfs_pressure_ratio(total_objects);
        drop_super(sb);
@@ -234,6 +238,7 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags)
                s->s_shrink.scan_objects = super_cache_scan;
                s->s_shrink.count_objects = super_cache_count;
                s->s_shrink.batch = 1024;
+               s->s_shrink.flags = SHRINKER_NUMA_AWARE;
        }
 out:
        return s;

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 443a8bc0b9074f6c05fbb50e9b7f18ef1492b0e5..ec2b26764bf32a787d9eb24a0e51127b14c9b6b6 100644 (file)
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1536,7 +1536,8 @@ xfs_fs_mount(
 
 static long
 xfs_fs_nr_cached_objects(
-       struct super_block      *sb)
+       struct super_block      *sb,
+       int                     nid)
 {
        return xfs_reclaim_inodes_count(XFS_M(sb));
 }
@@ -1544,7 +1545,8 @@ xfs_fs_nr_cached_objects(
 static long
 xfs_fs_free_cached_objects(
        struct super_block      *sb,
-       long                    nr_to_scan)
+       long                    nr_to_scan,
+       int                     nid)
 {
        return xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
 }

diff --git a/include/linux/fs.h b/include/linux/fs.h
index bf4f636bb1c5565ff09e88897cd646a4bf7ebfae..4cc9110f1a8dd1f52ffdc6f5b999d925e06a4a3a 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1612,8 +1612,8 @@ struct super_operations {
        ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
 #endif
        int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
-       long (*nr_cached_objects)(struct super_block *);
-       long (*free_cached_objects)(struct super_block *, long);
+       long (*nr_cached_objects)(struct super_block *, int);
+       long (*free_cached_objects)(struct super_block *, long, int);
 };
 
 /*