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authorShaohua Li <shli@kernel.org>2012-04-13 10:27:35 +0800
committerTheodore Ts'o <tytso@mit.edu>2012-04-23 21:43:41 -0400
commit99aa78466777083255b876293e9e83dec7cd809a (patch)
treee15bd88760cb27bb306929b19ba41abc53e0e333 /fs/jbd2
parent57f73c2c89a5d3b2ed87201c8100d1fa989a1a65 (diff)
downloadvexpress-lsk-99aa78466777083255b876293e9e83dec7cd809a.tar.gz
jbd2: use GFP_NOFS for blkdev_issue_flush
flush request is issued in transaction commit code path, so looks using GFP_KERNEL to allocate memory for flush request bio falls into the classic deadlock issue. I saw btrfs and dm get it right, but ext4, xfs and md are using GFP. Signed-off-by: Shaohua Li <shli@fusionio.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/jbd2')
-rw-r--r--fs/jbd2/commit.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 806525a7269..840f70f5079 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -723,7 +723,7 @@ start_journal_io:
if (commit_transaction->t_need_data_flush &&
(journal->j_fs_dev != journal->j_dev) &&
(journal->j_flags & JBD2_BARRIER))
- blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
+ blkdev_issue_flush(journal->j_fs_dev, GFP_NOFS, NULL);
/* Done it all: now write the commit record asynchronously. */
if (JBD2_HAS_INCOMPAT_FEATURE(journal,
@@ -859,7 +859,7 @@ wait_for_iobuf:
if (JBD2_HAS_INCOMPAT_FEATURE(journal,
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT) &&
journal->j_flags & JBD2_BARRIER) {
- blkdev_issue_flush(journal->j_dev, GFP_KERNEL, NULL);
+ blkdev_issue_flush(journal->j_dev, GFP_NOFS, NULL);
}
if (err)