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| author | Chao Yu <yuchao0@huawei.com> | 2016-10-12 19:28:29 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-11-23 12:11:00 -0800 |
| commit | b8559dc242d1d47dcf99660a4d6afded727e0cc0 (patch) | |
| tree | 58d9b26dcfad551706a894d8c4fff80a5bdbff6f /fs/f2fs/shrinker.c | |
| parent | a11b9f65eae766b17ec3451a6a1766f0a9d1dbff (diff) | |
| download | blackbird-obmc-linux-b8559dc242d1d47dcf99660a4d6afded727e0cc0.tar.gz blackbird-obmc-linux-b8559dc242d1d47dcf99660a4d6afded727e0cc0.zip | |
f2fs: split free nid list
During free nid allocation, in order to do preallocation, we will tag free
nid entry as allocated one and still leave it in free nid list, for other
allocators who want to grab free nids, it needs to traverse the free nid
list for lookup. It becomes overhead in scenario of allocating free nid
intensively by multithreads.
This patch splits free nid list to two list: {free,alloc}_nid_list, to
keep free nids and preallocated free nids separately, after that, traverse
latency will be gone, besides split nid_cnt for separate statistic.
Additionally, introduce __insert_nid_to_list and __remove_nid_from_list for
cleanup.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: modify f2fs_bug_on to avoid needless branches]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/shrinker.c')
| -rw-r--r-- | fs/f2fs/shrinker.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/f2fs/shrinker.c b/fs/f2fs/shrinker.c index 46c915425923..ec539f407cc4 100644 --- a/fs/f2fs/shrinker.c +++ b/fs/f2fs/shrinker.c @@ -26,8 +26,8 @@ static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi) static unsigned long __count_free_nids(struct f2fs_sb_info *sbi) { - if (NM_I(sbi)->fcnt > MAX_FREE_NIDS) - return NM_I(sbi)->fcnt - MAX_FREE_NIDS; + if (NM_I(sbi)->nid_cnt[FREE_NID_LIST] > MAX_FREE_NIDS) + return NM_I(sbi)->nid_cnt[FREE_NID_LIST] - MAX_FREE_NIDS; return 0; } |
