linux-kernel - [PATCH] f2fs: let's avoid to get cp_rwsem twice by f2fs_evict_inode by d

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Message-Id: <20221018005806.892778-1-jaegeuk@kernel.org>
Date:   Mon, 17 Oct 2022 17:58:06 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Cc:     Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH] f2fs: let's avoid to get cp_rwsem twice by f2fs_evict_inode by d_invalidate

f2fs_unlink
 -> f2fs_lock_op
 -> d_invalidate
  -> shrink_dentry_list
   -> iput_final
    -> f2fs_evict_inode
     -> f2fs_lock_op

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/namei.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index a389772fd212..e104409c3a0e 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -632,6 +632,8 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 		goto fail;
 	}
 	f2fs_delete_entry(de, page, dir, inode);
+	f2fs_unlock_op(sbi);
+
 #if IS_ENABLED(CONFIG_UNICODE)
 	/* VFS negative dentries are incompatible with Encoding and
 	 * Case-insensitiveness. Eventually we'll want avoid
@@ -642,8 +644,6 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 	if (IS_CASEFOLDED(dir))
 		d_invalidate(dentry);
 #endif
-	f2fs_unlock_op(sbi);
-
 	if (IS_DIRSYNC(dir))
 		f2fs_sync_fs(sbi->sb, 1);
 fail:
-- 
2.38.0.413.g74048e4d9e-goog