Commit 955ac6e5 authored Jul 24, 2018 by Sheng Yong Committed by Jaegeuk Kim Aug 01, 2018

f2fs: quota: decrease the lock granularity of statfs_project



According to fs/quota/dquot.c, `dq_data_lock' protects mem_dqinfo
structures and modifications of dquot pointers in the inode, and
`dquot->dq_dqb_lock' protects data from dq_dqb.

We should use dquot->dq_dqb_lock in statfs_project instead of
dq_dat_lock.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 970e348d

fs/f2fs/super.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1117,7 +1117,7 @@ static int f2fs_statfs_project(struct super_block *sb,
		dquot = dqget(sb, qid);
		if (IS_ERR(dquot))
		return PTR_ERR(dquot);
		spin_lock(&dq_data_lock);
		spin_lock(&dquot->dq_dqb_lock);

		limit = (dquot->dq_dqb.dqb_bsoftlimit ?
		dquot->dq_dqb.dqb_bsoftlimit :
		@@ -1140,7 +1140,7 @@ static int f2fs_statfs_project(struct super_block *sb,
		(buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
		}

		spin_unlock(&dq_data_lock);
		spin_unlock(&dquot->dq_dqb_lock);
		dqput(dquot);
		return 0;
		}

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