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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>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Dave Chinner 2013-08-28 10:18:05 +10:00 committed by Al Viro
parent 1d3d4437ea
commit 9b17c62382
6 changed files with 33 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/dcache.c
View File

@ -937,6 +937,7 @@ 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
@ -945,13 +946,14 @@ 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;
}

7
fs/inode.c
View File

@ -748,13 +748,14 @@ 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;
}

6
fs/internal.h
View File

@ -114,7 +114,8 @@ 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);
/*
@ -131,7 +132,8 @@ extern int invalidate_inodes(struct super_block *, bool);
*/
extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
extern int d_set_mounted(struct dentry *dentry);
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

23
fs/super.c
View File

@ -76,10 +76,10 @@ static unsigned long super_cache_scan(struct shrinker *shrink,
return SHRINK_STOP;
if (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);
@ -228,6 +232,7 @@ 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;

6
fs/xfs/xfs_super.c
View File

@ -1537,7 +1537,8 @@ 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));
}
@ -1545,7 +1546,8 @@ 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);
}

4
include/linux/fs.h
View File

@ -1624,8 +1624,8 @@ 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);
};
/*