commit: 99aa78466777083255b876293e9e83dec7cd809a From: Shaohua Li <[email protected]> Date: Fri, 13 Apr 2012 10:27:35 +0800 Subject: 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 <[email protected]> Signed-off-by: Theodore Ts'o <[email protected]> Reviewed-by: Jan Kara <[email protected]> Cc: [email protected] --- fs/jbd2/commit.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 806525a..840f70f 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) -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
