From: Yongqiang Yang <xiaoqiangnk@gmail.com>
To: tytso@mit.edu
Cc: linux-ext4@vger.kernel.org, Yongqiang Yang <xiaoqiangnk@gmail.com>
Subject: [PATCH 4/5] ext4: flush journal when switching from journal data mode
Date: Tue, 15 Nov 2011 16:07:53 +0800 [thread overview]
Message-ID: <1321344474-14707-4-git-send-email-xiaoqiangnk@gmail.com> (raw)
In-Reply-To: <1321344474-14707-1-git-send-email-xiaoqiangnk@gmail.com>
When switching from journal data mode, the data blocks
in journal will have no revoke record. Thus, data could be
corrupted during replay. However, there is no such problem in
switching to journal data mode. So we flush journal only in
the case that swithes from journal data mode.
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
---
fs/ext4/inode.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 384f8a7..755f6c7 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4689,7 +4689,6 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
}
jbd2_journal_lock_updates(journal);
- jbd2_journal_flush(journal);
/*
* OK, there are no updates running now, and all cached data is
@@ -4699,10 +4698,12 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
* the inode's in-core data-journaling state flag now.
*/
- if (val)
+ if (val) {
ext4_set_inode_flag(inode, EXT4_INODE_JOURNAL_DATA);
- else
+ } else {
+ jbd2_journal_flush(journal);
ext4_clear_inode_flag(inode, EXT4_INODE_JOURNAL_DATA);
+ }
ext4_set_aops(inode);
jbd2_journal_unlock_updates(journal);
--
1.7.5.1
next prev parent reply other threads:[~2011-11-15 10:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-15 8:07 [PATCH 1/5] ext4: allocate delalloc blocks before changing journal mode Yongqiang Yang
2011-11-15 8:07 ` [PATCH 2/5] ext4: let ext4 journal deletion of data blocks Yongqiang Yang
2011-12-28 17:23 ` Ted Ts'o
2011-12-30 14:59 ` Yongqiang Yang
2011-12-30 15:05 ` Ted Ts'o
2011-11-15 8:07 ` [PATCH 3/5] ext4: let ext4_free_blocks handle multiblock correctly Yongqiang Yang
2011-12-28 17:23 ` Ted Ts'o
2011-11-15 8:07 ` Yongqiang Yang [this message]
2011-12-28 18:56 ` [PATCH 4/5] ext4: flush journal when switching from journal data mode Ted Ts'o
2011-12-29 21:01 ` Darrick J. Wong
2011-12-30 14:43 ` Yongqiang Yang
2011-12-30 14:57 ` Ted Ts'o
2011-11-15 8:07 ` [PATCH 5/5] jbd2: clear revoked flag on buffers before a new transaction started Yongqiang Yang
2011-12-28 23:25 ` Ted Ts'o
2011-12-09 3:31 ` [PATCH 1/5] ext4: allocate delalloc blocks before changing journal mode Toshiyuki Okajima
2011-12-28 17:14 ` Ted Ts'o
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