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f2fs: delay awaking discard thread

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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>
This commit is contained in:
Chao Yu 2017-04-25 00:21:34 +08:00 committed by Jaegeuk Kim
parent 66a82d1fc7
commit 34e159da41
1 changed files with 2 additions and 1 deletions
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3
fs/f2fs/segment.c
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@ -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 @@ skip:
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)