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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>
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)