From 34e159da418be46986456daf21a339932f349b63 Mon Sep 17 00:00:00 2001 From: Chao Yu <yuchao0@huawei.com> Date: Tue, 25 Apr 2017 00:21:34 +0800 Subject: [PATCH] f2fs: delay awaking discard thread It's better to delay awaking discard thread while queuing discard commands in checkpoint, it will help to give more chances for merging big and small discard. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> --- fs/f2fs/segment.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 45da59b720350..b27ae5f6a87f1 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -968,7 +968,6 @@ static int __queue_discard_cmd(struct f2fs_sb_info *sbi, blkstart -= FDEV(devi).start_blk; } __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen); - wake_up(&SM_I(sbi)->dcc_info->discard_wait_queue); return 0; } @@ -1335,6 +1334,8 @@ void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc) SM_I(sbi)->dcc_info->nr_discards -= total_len; kmem_cache_free(discard_entry_slab, entry); } + + wake_up(&SM_I(sbi)->dcc_info->discard_wait_queue); } static int create_discard_cmd_control(struct f2fs_sb_info *sbi) -- GitLab