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| author | Chao Yu | 2015-07-28 12:33:46 +0200 |
|---|---|---|
| committer | Jaegeuk Kim | 2015-08-20 18:00:06 +0200 |
| commit | 31696580bf4c042a0f7b06d855e04441488d18b1 (patch) | |
| tree | 33904342d5332881fc6ffc925dbcb294c8ed87e4 /fs/f2fs/node.c | |
| parent | f2fs: avoid clear valid page (diff) | |
| download | kernel-qcow2-linux-31696580bf4c042a0f7b06d855e04441488d18b1.tar.gz kernel-qcow2-linux-31696580bf4c042a0f7b06d855e04441488d18b1.tar.xz kernel-qcow2-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/node.c')
| -rw-r--r-- | fs/f2fs/node.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index ac9110788b17..6e10c2a08ec6 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1635,6 +1635,34 @@ void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) kmem_cache_free(free_nid_slab, i); } +int try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct free_nid *i, *next; + int nr = nr_shrink; + + if (!mutex_trylock(&nm_i->build_lock)) + return 0; + + spin_lock(&nm_i->free_nid_list_lock); + list_for_each_entry_safe(i, next, &nm_i->free_nid_list, list) { + if (nr_shrink <= 0 || nm_i->fcnt <= NAT_ENTRY_PER_BLOCK) + break; + if (i->state == NID_ALLOC) + continue; + __del_from_free_nid_list(nm_i, i); + nm_i->fcnt--; + spin_unlock(&nm_i->free_nid_list_lock); + kmem_cache_free(free_nid_slab, i); + nr_shrink--; + spin_lock(&nm_i->free_nid_list_lock); + } + spin_unlock(&nm_i->free_nid_list_lock); + mutex_unlock(&nm_i->build_lock); + + return nr - nr_shrink; +} + void recover_inline_xattr(struct inode *inode, struct page *page) { void *src_addr, *dst_addr; |