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| author | Chao Yu <chao2.yu@samsung.com> | 2015-07-28 12:33:46 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-08-20 18:00:06 +0200 |
| commit | 31696580bf4c042a0f7b06d855e04441488d18b1 (patch) | |
| tree | 33904342d5332881fc6ffc925dbcb294c8ed87e4 /fs/f2fs/shrinker.c | |
| parent | f2fs: avoid clear valid page (diff) | |
| download | linux-31696580bf4c042a0f7b06d855e04441488d18b1.tar.xz linux-31696580bf4c042a0f7b06d855e04441488d18b1.zip | |
f2fs: shrink free_nids entries
This patch introduces __count_free_nids/try_to_free_nids and registers
them in slab shrinker for shrinking under memory pressure.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/shrinker.c')
| -rw-r--r-- | fs/f2fs/shrinker.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/f2fs/shrinker.c b/fs/f2fs/shrinker.c index 9aa4235cd304..da0d8e0b55a5 100644 --- a/fs/f2fs/shrinker.c +++ b/fs/f2fs/shrinker.c @@ -23,6 +23,13 @@ static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi) return NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt; } +static unsigned long __count_free_nids(struct f2fs_sb_info *sbi) +{ + if (NM_I(sbi)->fcnt > NAT_ENTRY_PER_BLOCK) + return NM_I(sbi)->fcnt - NAT_ENTRY_PER_BLOCK; + return 0; +} + static unsigned long __count_extent_cache(struct f2fs_sb_info *sbi) { return sbi->total_ext_tree + atomic_read(&sbi->total_ext_node); @@ -53,6 +60,9 @@ unsigned long f2fs_shrink_count(struct shrinker *shrink, /* shrink clean nat cache entries */ count += __count_nat_entries(sbi); + /* count free nids cache entries */ + count += __count_free_nids(sbi); + spin_lock(&f2fs_list_lock); p = p->next; mutex_unlock(&sbi->umount_mutex); @@ -97,6 +107,10 @@ unsigned long f2fs_shrink_scan(struct shrinker *shrink, if (freed < nr) freed += try_to_free_nats(sbi, nr - freed); + /* shrink free nids cache entries */ + if (freed < nr) + freed += try_to_free_nids(sbi, nr - freed); + spin_lock(&f2fs_list_lock); p = p->next; list_move_tail(&sbi->s_list, &f2fs_list); |