Hi,
On Fri, 2013-05-24 at 15:59 +0530, Glauber Costa wrote:
> From: Dave Chinner <dchinner@xxxxxxxxxx>
>
> Convert the filesystem shrinkers to use the new API, and standardise
> some of the behaviours of the shrinkers at the same time. For
> example, nr_to_scan means the number of objects to scan, not the
> number of objects to free.
>
> I refactored the CIFS idmap shrinker a little - it really needs to
> be broken up into a shrinker per tree and keep an item count with
> the tree root so that we don't need to walk the tree every time the
> shrinker needs to count the number of objects in the tree (i.e.
> all the time under memory pressure).
>
> [ glommer: fixes for ext4, ubifs, nfs, cifs and glock. Fixes are
> needed mainly due to new code merged in the tree ]
> Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
> Signed-off-by: Glauber Costa <glommer@xxxxxxxxxx>
> Acked-by: Mel Gorman <mgorman@xxxxxxx>
> Acked-by: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
> Acked-by: Jan Kara <jack@xxxxxxx>
> CC: Steven Whitehouse <swhiteho@xxxxxxxxxx>
> CC: Adrian Hunter <adrian.hunter@xxxxxxxxx>
GFS2 changes look good to me.
Acked-by: Steven Whitehouse <swhiteho@xxxxxxxxxx>
Steve.
> ---
> fs/ext4/extents_status.c | 30 ++++++++++++++++------------
> fs/gfs2/glock.c | 28 +++++++++++++++-----------
> fs/gfs2/main.c | 3 ++-
> fs/gfs2/quota.c | 12 +++++++-----
> fs/gfs2/quota.h | 4 +++-
> fs/mbcache.c | 51 ++++++++++++++++++++++++++++--------------------
> fs/nfs/dir.c | 18 ++++++++++++++---
> fs/nfs/internal.h | 4 +++-
> fs/nfs/super.c | 3 ++-
> fs/nfsd/nfscache.c | 31 ++++++++++++++++++++---------
> fs/quota/dquot.c | 34 +++++++++++++++-----------------
> fs/ubifs/shrinker.c | 20 +++++++++++--------
> fs/ubifs/super.c | 3 ++-
> fs/ubifs/ubifs.h | 3 ++-
> 14 files changed, 151 insertions(+), 93 deletions(-)
>
> diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
> index e6941e6..4bce4f0 100644
> --- a/fs/ext4/extents_status.c
> +++ b/fs/ext4/extents_status.c
> @@ -878,20 +878,26 @@ int ext4_es_zeroout(struct inode *inode, struct ext4_extent *ex)
> EXTENT_STATUS_WRITTEN);
> }
>
> -static int ext4_es_shrink(struct shrinker *shrink, struct shrink_control *sc)
> +
> +static long ext4_es_count(struct shrinker *shrink, struct shrink_control *sc)
> +{
> + long nr;
> + struct ext4_sb_info *sbi = container_of(shrink,
> + struct ext4_sb_info, s_es_shrinker);
> +
> + nr = percpu_counter_read_positive(&sbi->s_extent_cache_cnt);
> + trace_ext4_es_shrink_enter(sbi->s_sb, sc->nr_to_scan, nr);
> + return nr;
> +}
> +
> +static long ext4_es_scan(struct shrinker *shrink, struct shrink_control *sc)
> {
> struct ext4_sb_info *sbi = container_of(shrink,
> struct ext4_sb_info, s_es_shrinker);
> struct ext4_inode_info *ei;
> struct list_head *cur, *tmp, scanned;
> int nr_to_scan = sc->nr_to_scan;
> - int ret, nr_shrunk = 0;
> -
> - ret = percpu_counter_read_positive(&sbi->s_extent_cache_cnt);
> - trace_ext4_es_shrink_enter(sbi->s_sb, nr_to_scan, ret);
> -
> - if (!nr_to_scan)
> - return ret;
> + int ret = 0, nr_shrunk = 0;
>
> INIT_LIST_HEAD(&scanned);
>
> @@ -920,9 +926,8 @@ static int ext4_es_shrink(struct shrinker *shrink, struct shrink_control *sc)
> list_splice_tail(&scanned, &sbi->s_es_lru);
> spin_unlock(&sbi->s_es_lru_lock);
>
> - ret = percpu_counter_read_positive(&sbi->s_extent_cache_cnt);
> trace_ext4_es_shrink_exit(sbi->s_sb, nr_shrunk, ret);
> - return ret;
> + return nr_shrunk;
> }
>
> void ext4_es_register_shrinker(struct super_block *sb)
> @@ -932,7 +937,8 @@ void ext4_es_register_shrinker(struct super_block *sb)
> sbi = EXT4_SB(sb);
> INIT_LIST_HEAD(&sbi->s_es_lru);
> spin_lock_init(&sbi->s_es_lru_lock);
> - sbi->s_es_shrinker.shrink = ext4_es_shrink;
> + sbi->s_es_shrinker.scan_objects = ext4_es_scan;
> + sbi->s_es_shrinker.count_objects = ext4_es_count;
> sbi->s_es_shrinker.seeks = DEFAULT_SEEKS;
> register_shrinker(&sbi->s_es_shrinker);
> }
> @@ -973,7 +979,7 @@ static int __es_try_to_reclaim_extents(struct ext4_inode_info *ei,
> struct ext4_es_tree *tree = &ei->i_es_tree;
> struct rb_node *node;
> struct extent_status *es;
> - int nr_shrunk = 0;
> + long nr_shrunk = 0;
>
> if (ei->i_es_lru_nr == 0)
> return 0;
> diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
> index 3bd2748..4ddbccb 100644
> --- a/fs/gfs2/glock.c
> +++ b/fs/gfs2/glock.c
> @@ -1428,21 +1428,22 @@ __acquires(&lru_lock)
> * gfs2_dispose_glock_lru() above.
> */
>
> -static void gfs2_scan_glock_lru(int nr)
> +static long gfs2_scan_glock_lru(int nr)
> {
> struct gfs2_glock *gl;
> LIST_HEAD(skipped);
> LIST_HEAD(dispose);
> + long freed = 0;
>
> spin_lock(&lru_lock);
> - while(nr && !list_empty(&lru_list)) {
> + while ((nr-- >= 0) && !list_empty(&lru_list)) {
> gl = list_entry(lru_list.next, struct gfs2_glock, gl_lru);
>
> /* Test for being demotable */
> if (!test_and_set_bit(GLF_LOCK, &gl->gl_flags)) {
> list_move(&gl->gl_lru, &dispose);
> atomic_dec(&lru_count);
> - nr--;
> + freed++;
> continue;
> }
>
> @@ -1452,23 +1453,28 @@ static void gfs2_scan_glock_lru(int nr)
> if (!list_empty(&dispose))
> gfs2_dispose_glock_lru(&dispose);
> spin_unlock(&lru_lock);
> +
> + return freed;
> }
>
> -static int gfs2_shrink_glock_memory(struct shrinker *shrink,
> - struct shrink_control *sc)
> +static long gfs2_glock_shrink_scan(struct shrinker *shrink,
> + struct shrink_control *sc)
> {
> - if (sc->nr_to_scan) {
> - if (!(sc->gfp_mask & __GFP_FS))
> - return -1;
> - gfs2_scan_glock_lru(sc->nr_to_scan);
> - }
> + if (!(sc->gfp_mask & __GFP_FS))
> + return -1;
> + return gfs2_scan_glock_lru(sc->nr_to_scan);
> +}
>
> +static long gfs2_glock_shrink_count(struct shrinker *shrink,
> + struct shrink_control *sc)
> +{
> return vfs_pressure_ratio(atomic_read(&lru_count));
> }
>
> static struct shrinker glock_shrinker = {
> - .shrink = gfs2_shrink_glock_memory,
> .seeks = DEFAULT_SEEKS,
> + .count_objects = gfs2_glock_shrink_count,
> + .scan_objects = gfs2_glock_shrink_scan,
> };
>
> /**
> diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
> index e04d0e0..a105d84 100644
> --- a/fs/gfs2/main.c
> +++ b/fs/gfs2/main.c
> @@ -32,7 +32,8 @@
> struct workqueue_struct *gfs2_control_wq;
>
> static struct shrinker qd_shrinker = {
> - .shrink = gfs2_shrink_qd_memory,
> + .count_objects = gfs2_qd_shrink_count,
> + .scan_objects = gfs2_qd_shrink_scan,
> .seeks = DEFAULT_SEEKS,
> };
>
> diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
> index 5c14206..77b82f6 100644
> --- a/fs/gfs2/quota.c
> +++ b/fs/gfs2/quota.c
> @@ -75,14 +75,12 @@ static LIST_HEAD(qd_lru_list);
> static atomic_t qd_lru_count = ATOMIC_INIT(0);
> static DEFINE_SPINLOCK(qd_lru_lock);
>
> -int gfs2_shrink_qd_memory(struct shrinker *shrink, struct shrink_control *sc)
> +long gfs2_qd_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
> {
> struct gfs2_quota_data *qd;
> struct gfs2_sbd *sdp;
> int nr_to_scan = sc->nr_to_scan;
> -
> - if (nr_to_scan == 0)
> - goto out;
> + long freed = 0;
>
> if (!(sc->gfp_mask & __GFP_FS))
> return -1;
> @@ -110,10 +108,14 @@ int gfs2_shrink_qd_memory(struct shrinker *shrink, struct shrink_control *sc)
> kmem_cache_free(gfs2_quotad_cachep, qd);
> spin_lock(&qd_lru_lock);
> nr_to_scan--;
> + freed++;
> }
> spin_unlock(&qd_lru_lock);
> + return freed;
> +}
>
> -out:
> +long gfs2_qd_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
> +{
> return vfs_pressure_ratio(atomic_read(&qd_lru_count));
> }
>
> diff --git a/fs/gfs2/quota.h b/fs/gfs2/quota.h
> index 4f5e6e4..4f61708 100644
> --- a/fs/gfs2/quota.h
> +++ b/fs/gfs2/quota.h
> @@ -53,7 +53,9 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip)
> return ret;
> }
>
> -extern int gfs2_shrink_qd_memory(struct shrinker *shrink,
> +extern long gfs2_qd_shrink_count(struct shrinker *shrink,
> + struct shrink_control *sc);
> +extern long gfs2_qd_shrink_scan(struct shrinker *shrink,
> struct shrink_control *sc);
> extern const struct quotactl_ops gfs2_quotactl_ops;
>
> diff --git a/fs/mbcache.c b/fs/mbcache.c
> index 5eb0476..009a463 100644
> --- a/fs/mbcache.c
> +++ b/fs/mbcache.c
> @@ -86,18 +86,6 @@ static LIST_HEAD(mb_cache_list);
> static LIST_HEAD(mb_cache_lru_list);
> static DEFINE_SPINLOCK(mb_cache_spinlock);
>
> -/*
> - * What the mbcache registers as to get shrunk dynamically.
> - */
> -
> -static int mb_cache_shrink_fn(struct shrinker *shrink,
> - struct shrink_control *sc);
> -
> -static struct shrinker mb_cache_shrinker = {
> - .shrink = mb_cache_shrink_fn,
> - .seeks = DEFAULT_SEEKS,
> -};
> -
> static inline int
> __mb_cache_entry_is_hashed(struct mb_cache_entry *ce)
> {
> @@ -151,7 +139,7 @@ forget:
>
>
> /*
> - * mb_cache_shrink_fn() memory pressure callback
> + * mb_cache_shrink_scan() memory pressure callback
> *
> * This function is called by the kernel memory management when memory
> * gets low.
> @@ -159,17 +147,18 @@ forget:
> * @shrink: (ignored)
> * @sc: shrink_control passed from reclaim
> *
> - * Returns the number of objects which are present in the cache.
> + * Returns the number of objects freed.
> */
> -static int
> -mb_cache_shrink_fn(struct shrinker *shrink, struct shrink_control *sc)
> +static long
> +mb_cache_shrink_scan(
> + struct shrinker *shrink,
> + struct shrink_control *sc)
> {
> LIST_HEAD(free_list);
> - struct mb_cache *cache;
> struct mb_cache_entry *entry, *tmp;
> - int count = 0;
> int nr_to_scan = sc->nr_to_scan;
> gfp_t gfp_mask = sc->gfp_mask;
> + long freed = 0;
>
> mb_debug("trying to free %d entries", nr_to_scan);
> spin_lock(&mb_cache_spinlock);
> @@ -179,19 +168,39 @@ mb_cache_shrink_fn(struct shrinker *shrink, struct shrink_control *sc)
> struct mb_cache_entry, e_lru_list);
> list_move_tail(&ce->e_lru_list, &free_list);
> __mb_cache_entry_unhash(ce);
> + freed++;
> + }
> + spin_unlock(&mb_cache_spinlock);
> + list_for_each_entry_safe(entry, tmp, &free_list, e_lru_list) {
> + __mb_cache_entry_forget(entry, gfp_mask);
> }
> + return freed;
> +}
> +
> +static long
> +mb_cache_shrink_count(
> + struct shrinker *shrink,
> + struct shrink_control *sc)
> +{
> + struct mb_cache *cache;
> + long count = 0;
> +
> + spin_lock(&mb_cache_spinlock);
> list_for_each_entry(cache, &mb_cache_list, c_cache_list) {
> mb_debug("cache %s (%d)", cache->c_name,
> atomic_read(&cache->c_entry_count));
> count += atomic_read(&cache->c_entry_count);
> }
> spin_unlock(&mb_cache_spinlock);
> - list_for_each_entry_safe(entry, tmp, &free_list, e_lru_list) {
> - __mb_cache_entry_forget(entry, gfp_mask);
> - }
> +
> return vfs_pressure_ratio(count);
> }
>
> +static struct shrinker mb_cache_shrinker = {
> + .count_objects = mb_cache_shrink_count,
> + .scan_objects = mb_cache_shrink_scan,
> + .seeks = DEFAULT_SEEKS,
> +};
>
> /*
> * mb_cache_create() create a new cache
> diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
> index 54d7c47..b355905 100644
> --- a/fs/nfs/dir.c
> +++ b/fs/nfs/dir.c
> @@ -1958,17 +1958,20 @@ static void nfs_access_free_list(struct list_head *head)
> }
> }
>
> -int nfs_access_cache_shrinker(struct shrinker *shrink,
> - struct shrink_control *sc)
> +long
> +nfs_access_cache_scan(
> + struct shrinker *shrink,
> + struct shrink_control *sc)
> {
> LIST_HEAD(head);
> struct nfs_inode *nfsi, *next;
> struct nfs_access_entry *cache;
> int nr_to_scan = sc->nr_to_scan;
> gfp_t gfp_mask = sc->gfp_mask;
> + long freed = 0;
>
> if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
> - return (nr_to_scan == 0) ? 0 : -1;
> + return -1;
>
> spin_lock(&nfs_access_lru_lock);
> list_for_each_entry_safe(nfsi, next, &nfs_access_lru_list, access_cache_inode_lru) {
> @@ -1984,6 +1987,7 @@ int nfs_access_cache_shrinker(struct shrinker *shrink,
> struct nfs_access_entry, lru);
> list_move(&cache->lru, &head);
> rb_erase(&cache->rb_node, &nfsi->access_cache);
> + freed++;
> if (!list_empty(&nfsi->access_cache_entry_lru))
> list_move_tail(&nfsi->access_cache_inode_lru,
> &nfs_access_lru_list);
> @@ -1998,6 +2002,14 @@ remove_lru_entry:
> }
> spin_unlock(&nfs_access_lru_lock);
> nfs_access_free_list(&head);
> + return freed;
> +}
> +
> +long
> +nfs_access_cache_count(
> + struct shrinker *shrink,
> + struct shrink_control *sc)
> +{
> return vfs_pressure_ratio(atomic_long_read(&nfs_access_nr_entries));
> }
>
> diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
> index 91e59a3..9651e20 100644
> --- a/fs/nfs/internal.h
> +++ b/fs/nfs/internal.h
> @@ -269,7 +269,9 @@ extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
> const char *ip_addr, rpc_authflavor_t authflavour);
>
> /* dir.c */
> -extern int nfs_access_cache_shrinker(struct shrinker *shrink,
> +extern long nfs_access_cache_count(struct shrinker *shrink,
> + struct shrink_control *sc);
> +extern long nfs_access_cache_scan(struct shrinker *shrink,
> struct shrink_control *sc);
> struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
> int nfs_create(struct inode *, struct dentry *, umode_t, bool);
> diff --git a/fs/nfs/super.c b/fs/nfs/super.c
> index a366107..2fed70f 100644
> --- a/fs/nfs/super.c
> +++ b/fs/nfs/super.c
> @@ -359,7 +359,8 @@ static void unregister_nfs4_fs(void)
> #endif
>
> static struct shrinker acl_shrinker = {
> - .shrink = nfs_access_cache_shrinker,
> + .count_objects = nfs_access_cache_count,
> + .scan_objects = nfs_access_cache_scan,
> .seeks = DEFAULT_SEEKS,
> };
>
> diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
> index e76244e..5564c38 100644
> --- a/fs/nfsd/nfscache.c
> +++ b/fs/nfsd/nfscache.c
> @@ -59,11 +59,14 @@ static unsigned int longest_chain_cachesize;
>
> static int nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *vec);
> static void cache_cleaner_func(struct work_struct *unused);
> -static int nfsd_reply_cache_shrink(struct shrinker *shrink,
> - struct shrink_control *sc);
> +static long nfsd_reply_cache_count(struct shrinker *shrink,
> + struct shrink_control *sc);
> +static long nfsd_reply_cache_scan(struct shrinker *shrink,
> + struct shrink_control *sc);
>
> static struct shrinker nfsd_reply_cache_shrinker = {
> - .shrink = nfsd_reply_cache_shrink,
> + .scan_objects = nfsd_reply_cache_scan,
> + .count_objects = nfsd_reply_cache_count,
> .seeks = 1,
> };
>
> @@ -232,16 +235,18 @@ nfsd_cache_entry_expired(struct svc_cacherep *rp)
> * Walk the LRU list and prune off entries that are older than RC_EXPIRE.
> * Also prune the oldest ones when the total exceeds the max number of entries.
> */
> -static void
> +static long
> prune_cache_entries(void)
> {
> struct svc_cacherep *rp, *tmp;
> + long freed = 0;
>
> list_for_each_entry_safe(rp, tmp, &lru_head, c_lru) {
> if (!nfsd_cache_entry_expired(rp) &&
> num_drc_entries <= max_drc_entries)
> break;
> nfsd_reply_cache_free_locked(rp);
> + freed++;
> }
>
> /*
> @@ -254,6 +259,7 @@ prune_cache_entries(void)
> cancel_delayed_work(&cache_cleaner);
> else
> mod_delayed_work(system_wq, &cache_cleaner, RC_EXPIRE);
> + return freed;
> }
>
> static void
> @@ -264,20 +270,27 @@ cache_cleaner_func(struct work_struct *unused)
> spin_unlock(&cache_lock);
> }
>
> -static int
> -nfsd_reply_cache_shrink(struct shrinker *shrink, struct shrink_control *sc)
> +static long
> +nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc)
> {
> - unsigned int num;
> + long num;
>
> spin_lock(&cache_lock);
> - if (sc->nr_to_scan)
> - prune_cache_entries();
> num = num_drc_entries;
> spin_unlock(&cache_lock);
>
> return num;
> }
>
> +static long
> +nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc)
> +{
> + long freed;
> + spin_lock(&cache_lock);
> + freed = prune_cache_entries();
> + spin_unlock(&cache_lock);
> + return freed;
> +}
> /*
> * Walk an xdr_buf and get a CRC for at most the first RC_CSUMLEN bytes
> */
> diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
> index 762b09c..fd6b762 100644
> --- a/fs/quota/dquot.c
> +++ b/fs/quota/dquot.c
> @@ -687,44 +687,42 @@ int dquot_quota_sync(struct super_block *sb, int type)
> }
> EXPORT_SYMBOL(dquot_quota_sync);
>
> -/* Free unused dquots from cache */
> -static void prune_dqcache(int count)
> +static long
> +dqcache_shrink_scan(
> + struct shrinker *shrink,
> + struct shrink_control *sc)
> {
> struct list_head *head;
> struct dquot *dquot;
> + long freed = 0;
>
> head = free_dquots.prev;
> - while (head != &free_dquots && count) {
> + while (head != &free_dquots && sc->nr_to_scan) {
> dquot = list_entry(head, struct dquot, dq_free);
> remove_dquot_hash(dquot);
> remove_free_dquot(dquot);
> remove_inuse(dquot);
> do_destroy_dquot(dquot);
> - count--;
> + sc->nr_to_scan--;
> + freed++;
> head = free_dquots.prev;
> }
> + return freed;
> }
>
> -/*
> - * This is called from kswapd when we think we need some
> - * more memory
> - */
> -static int shrink_dqcache_memory(struct shrinker *shrink,
> - struct shrink_control *sc)
> -{
> - int nr = sc->nr_to_scan;
> +static long
> +dqcache_shrink_count(
> + struct shrinker *shrink,
> + struct shrink_control *sc)
>
> - if (nr) {
> - spin_lock(&dq_list_lock);
> - prune_dqcache(nr);
> - spin_unlock(&dq_list_lock);
> - }
> +{
> return vfs_pressure_ratio(
> percpu_counter_read_positive(&dqstats.counter[DQST_FREE_DQUOTS]));
> }
>
> static struct shrinker dqcache_shrinker = {
> - .shrink = shrink_dqcache_memory,
> + .count_objects = dqcache_shrink_count,
> + .scan_objects = dqcache_shrink_scan,
> .seeks = DEFAULT_SEEKS,
> };
>
> diff --git a/fs/ubifs/shrinker.c b/fs/ubifs/shrinker.c
> index 9e1d056..669d8c0 100644
> --- a/fs/ubifs/shrinker.c
> +++ b/fs/ubifs/shrinker.c
> @@ -277,19 +277,23 @@ static int kick_a_thread(void)
> return 0;
> }
>
> -int ubifs_shrinker(struct shrinker *shrink, struct shrink_control *sc)
> +long ubifs_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
> +{
> + long clean_zn_cnt = atomic_long_read(&ubifs_clean_zn_cnt);
> +
> + /*
> + * Due to the way UBIFS updates the clean znode counter it may
> + * temporarily be negative.
> + */
> + return clean_zn_cnt >= 0 ? clean_zn_cnt : 1;
> +}
> +
> +long ubifs_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
> {
> int nr = sc->nr_to_scan;
> int freed, contention = 0;
> long clean_zn_cnt = atomic_long_read(&ubifs_clean_zn_cnt);
>
> - if (nr == 0)
> - /*
> - * Due to the way UBIFS updates the clean znode counter it may
> - * temporarily be negative.
> - */
> - return clean_zn_cnt >= 0 ? clean_zn_cnt : 1;
> -
> if (!clean_zn_cnt) {
> /*
> * No clean znodes, nothing to reap. All we can do in this case
> diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
> index f21acf0..ff357e0 100644
> --- a/fs/ubifs/super.c
> +++ b/fs/ubifs/super.c
> @@ -49,7 +49,8 @@ struct kmem_cache *ubifs_inode_slab;
>
> /* UBIFS TNC shrinker description */
> static struct shrinker ubifs_shrinker_info = {
> - .shrink = ubifs_shrinker,
> + .scan_objects = ubifs_shrink_scan,
> + .count_objects = ubifs_shrink_count,
> .seeks = DEFAULT_SEEKS,
> };
>
> diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
> index b2babce..bcdafcc 100644
> --- a/fs/ubifs/ubifs.h
> +++ b/fs/ubifs/ubifs.h
> @@ -1624,7 +1624,8 @@ int ubifs_tnc_start_commit(struct ubifs_info *c, struct ubifs_zbranch *zroot);
> int ubifs_tnc_end_commit(struct ubifs_info *c);
>
> /* shrinker.c */
> -int ubifs_shrinker(struct shrinker *shrink, struct shrink_control *sc);
> +long ubifs_shrink_scan(struct shrinker *shrink, struct shrink_control *sc);
> +long ubifs_shrink_count(struct shrinker *shrink, struct shrink_control *sc);
>
> /* commit.c */
> int ubifs_bg_thread(void *info);
--
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