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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-08-23 07:15:43 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-08-29 20:05:33 +0300 |
| commit | 01983c715ad0e78842a885f361ad927a3a985994 (patch) | |
| tree | dd8995b6626b9b423bcf2e7170f85d55879e65f7 /fs/f2fs/segment.h | |
| parent | adb6dc197187e2a5f5a7bed01e722f46a58676af (diff) | |
| download | linux-01983c715ad0e78842a885f361ad927a3a985994.tar.xz | |
f2fs: wake up discard_thread iff there is a candidate
This patch fixes to avoid needless wake ups.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.h')
| -rw-r--r-- | fs/f2fs/segment.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index b9b4f85ffeb6..613b2fa7b1c1 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -798,3 +798,28 @@ static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type, wbc->nr_to_write = desired; return desired - nr_to_write; } + +static inline void wake_up_discard_thread(struct f2fs_sb_info *sbi, bool force) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + bool wakeup = false; + int i; + + if (force) + goto wake_up; + + mutex_lock(&dcc->cmd_lock); + for (i = MAX_PLIST_NUM - 1; + i >= 0 && plist_issue(dcc->pend_list_tag[i]); i--) { + if (!list_empty(&dcc->pend_list[i])) { + wakeup = true; + break; + } + } + mutex_unlock(&dcc->cmd_lock); + if (!wakeup) + return; +wake_up: + dcc->discard_wake = 1; + wake_up_interruptible_all(&dcc->discard_wait_queue); +} |