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-rw-r--r--fs/ext4/ext4.h2
-rw-r--r--fs/ext4/extents_status.c75
-rw-r--r--fs/ext4/extents_status.h5
-rw-r--r--fs/ext4/inode.c4
-rw-r--r--fs/ext4/super.c7
5 files changed, 68 insertions, 25 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index f85f1fb49df8..f5f3b6c58240 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -864,6 +864,7 @@ struct ext4_inode_info {
rwlock_t i_es_lock;
struct list_head i_es_lru;
unsigned int i_es_lru_nr; /* protected by i_es_lock */
+ unsigned long i_touch_when; /* jiffies of last accessing */
/* ialloc */
ext4_group_t i_last_alloc_group;
@@ -1303,6 +1304,7 @@ struct ext4_sb_info {
/* Reclaim extents from extent status tree */
struct shrinker s_es_shrinker;
struct list_head s_es_lru;
+ unsigned long s_es_last_sorted;
struct percpu_counter s_extent_cache_cnt;
spinlock_t s_es_lru_lock ____cacheline_aligned_in_smp;
};
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index e6941e622d31..ee018d5f397e 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -10,6 +10,7 @@
* Ext4 extents status tree core functions.
*/
#include <linux/rbtree.h>
+#include <linux/list_sort.h>
#include "ext4.h"
#include "extents_status.h"
#include "ext4_extents.h"
@@ -291,7 +292,6 @@ out:
read_unlock(&EXT4_I(inode)->i_es_lock);
- ext4_es_lru_add(inode);
trace_ext4_es_find_delayed_extent_range_exit(inode, es);
}
@@ -672,7 +672,6 @@ int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
error:
write_unlock(&EXT4_I(inode)->i_es_lock);
- ext4_es_lru_add(inode);
ext4_es_print_tree(inode);
return err;
@@ -734,7 +733,6 @@ out:
read_unlock(&EXT4_I(inode)->i_es_lock);
- ext4_es_lru_add(inode);
trace_ext4_es_lookup_extent_exit(inode, es, found);
return found;
}
@@ -878,12 +876,28 @@ int ext4_es_zeroout(struct inode *inode, struct ext4_extent *ex)
EXTENT_STATUS_WRITTEN);
}
+static int ext4_inode_touch_time_cmp(void *priv, struct list_head *a,
+ struct list_head *b)
+{
+ struct ext4_inode_info *eia, *eib;
+ eia = list_entry(a, struct ext4_inode_info, i_es_lru);
+ eib = list_entry(b, struct ext4_inode_info, i_es_lru);
+
+ if (eia->i_touch_when == eib->i_touch_when)
+ return 0;
+ if (time_after(eia->i_touch_when, eib->i_touch_when))
+ return 1;
+ else
+ return -1;
+}
+
static int ext4_es_shrink(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;
+ struct list_head *cur, *tmp;
+ LIST_HEAD(skiped);
int nr_to_scan = sc->nr_to_scan;
int ret, nr_shrunk = 0;
@@ -893,23 +907,41 @@ static int ext4_es_shrink(struct shrinker *shrink, struct shrink_control *sc)
if (!nr_to_scan)
return ret;
- INIT_LIST_HEAD(&scanned);
-
spin_lock(&sbi->s_es_lru_lock);
+
+ /*
+ * If the inode that is at the head of LRU list is newer than
+ * last_sorted time, that means that we need to sort this list.
+ */
+ ei = list_first_entry(&sbi->s_es_lru, struct ext4_inode_info, i_es_lru);
+ if (sbi->s_es_last_sorted < ei->i_touch_when) {
+ list_sort(NULL, &sbi->s_es_lru, ext4_inode_touch_time_cmp);
+ sbi->s_es_last_sorted = jiffies;
+ }
+
list_for_each_safe(cur, tmp, &sbi->s_es_lru) {
- list_move_tail(cur, &scanned);
+ /*
+ * If we have already reclaimed all extents from extent
+ * status tree, just stop the loop immediately.
+ */
+ if (percpu_counter_read_positive(&sbi->s_extent_cache_cnt) == 0)
+ break;
ei = list_entry(cur, struct ext4_inode_info, i_es_lru);
- read_lock(&ei->i_es_lock);
- if (ei->i_es_lru_nr == 0) {
- read_unlock(&ei->i_es_lock);
+ /* Skip the inode that is newer than the last_sorted time */
+ if (sbi->s_es_last_sorted < ei->i_touch_when) {
+ list_move_tail(cur, &skiped);
continue;
}
- read_unlock(&ei->i_es_lock);
+
+ if (ei->i_es_lru_nr == 0)
+ continue;
write_lock(&ei->i_es_lock);
ret = __es_try_to_reclaim_extents(ei, nr_to_scan);
+ if (ei->i_es_lru_nr == 0)
+ list_del_init(&ei->i_es_lru);
write_unlock(&ei->i_es_lock);
nr_shrunk += ret;
@@ -917,7 +949,9 @@ static int ext4_es_shrink(struct shrinker *shrink, struct shrink_control *sc)
if (nr_to_scan == 0)
break;
}
- list_splice_tail(&scanned, &sbi->s_es_lru);
+
+ /* Move the newer inodes into the tail of the LRU list. */
+ list_splice_tail(&skiped, &sbi->s_es_lru);
spin_unlock(&sbi->s_es_lru_lock);
ret = percpu_counter_read_positive(&sbi->s_extent_cache_cnt);
@@ -925,21 +959,19 @@ static int ext4_es_shrink(struct shrinker *shrink, struct shrink_control *sc)
return ret;
}
-void ext4_es_register_shrinker(struct super_block *sb)
+void ext4_es_register_shrinker(struct ext4_sb_info *sbi)
{
- struct ext4_sb_info *sbi;
-
- sbi = EXT4_SB(sb);
INIT_LIST_HEAD(&sbi->s_es_lru);
spin_lock_init(&sbi->s_es_lru_lock);
+ sbi->s_es_last_sorted = 0;
sbi->s_es_shrinker.shrink = ext4_es_shrink;
sbi->s_es_shrinker.seeks = DEFAULT_SEEKS;
register_shrinker(&sbi->s_es_shrinker);
}
-void ext4_es_unregister_shrinker(struct super_block *sb)
+void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi)
{
- unregister_shrinker(&EXT4_SB(sb)->s_es_shrinker);
+ unregister_shrinker(&sbi->s_es_shrinker);
}
void ext4_es_lru_add(struct inode *inode)
@@ -947,11 +979,14 @@ void ext4_es_lru_add(struct inode *inode)
struct ext4_inode_info *ei = EXT4_I(inode);
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+ ei->i_touch_when = jiffies;
+
+ if (!list_empty(&ei->i_es_lru))
+ return;
+
spin_lock(&sbi->s_es_lru_lock);
if (list_empty(&ei->i_es_lru))
list_add_tail(&ei->i_es_lru, &sbi->s_es_lru);
- else
- list_move_tail(&ei->i_es_lru, &sbi->s_es_lru);
spin_unlock(&sbi->s_es_lru_lock);
}
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
index f740eb03b707..e936730cc5b0 100644
--- a/fs/ext4/extents_status.h
+++ b/fs/ext4/extents_status.h
@@ -39,6 +39,7 @@
EXTENT_STATUS_DELAYED | \
EXTENT_STATUS_HOLE)
+struct ext4_sb_info;
struct ext4_extent;
struct extent_status {
@@ -119,8 +120,8 @@ static inline void ext4_es_store_status(struct extent_status *es,
es->es_pblk = block;
}
-extern void ext4_es_register_shrinker(struct super_block *sb);
-extern void ext4_es_unregister_shrinker(struct super_block *sb);
+extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi);
+extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_lru_add(struct inode *inode);
extern void ext4_es_lru_del(struct inode *inode);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 0db830d541ec..f9ba51f68777 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -514,6 +514,8 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
"logical block %lu\n", inode->i_ino, flags, map->m_len,
(unsigned long) map->m_lblk);
+ ext4_es_lru_add(inode);
+
/* Lookup extent status tree firstly */
if (ext4_es_lookup_extent(inode, map->m_lblk, &es)) {
if (ext4_es_is_written(&es) || ext4_es_is_unwritten(&es)) {
@@ -1526,6 +1528,8 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
"logical block %lu\n", inode->i_ino, map->m_len,
(unsigned long) map->m_lblk);
+ ext4_es_lru_add(inode);
+
/* Lookup extent status tree firstly */
if (ext4_es_lookup_extent(inode, iblock, &es)) {
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 54701fca4515..cc8201180b30 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -773,7 +773,7 @@ static void ext4_put_super(struct super_block *sb)
ext4_abort(sb, "Couldn't clean up the journal");
}
- ext4_es_unregister_shrinker(sb);
+ ext4_es_unregister_shrinker(sbi);
del_timer(&sbi->s_err_report);
ext4_release_system_zone(sb);
ext4_mb_release(sb);
@@ -862,6 +862,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
rwlock_init(&ei->i_es_lock);
INIT_LIST_HEAD(&ei->i_es_lru);
ei->i_es_lru_nr = 0;
+ ei->i_touch_when = 0;
ei->i_reserved_data_blocks = 0;
ei->i_reserved_meta_blocks = 0;
ei->i_allocated_meta_blocks = 0;
@@ -3799,7 +3800,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_err_report.data = (unsigned long) sb;
/* Register extent status tree shrinker */
- ext4_es_register_shrinker(sb);
+ ext4_es_register_shrinker(sbi);
err = percpu_counter_init(&sbi->s_freeclusters_counter,
ext4_count_free_clusters(sb));
@@ -4127,7 +4128,7 @@ failed_mount_wq:
sbi->s_journal = NULL;
}
failed_mount3:
- ext4_es_unregister_shrinker(sb);
+ ext4_es_unregister_shrinker(sbi);
del_timer(&sbi->s_err_report);
if (sbi->s_flex_groups)
ext4_kvfree(sbi->s_flex_groups);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 21:51:20 +0000