3.16.65-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Theodore Ts'o <tytso@xxxxxxx> commit 812c0cab2c0dfad977605dbadf9148490ca5d93f upstream. There are enough credits reserved for most dioread_nolock writes; however, if the extent tree is sufficiently deep, and/or quota is enabled, the code was not allowing for all eventualities when reserving journal credits for the unwritten extent conversion. This problem can be seen using xfstests ext4/034: WARNING: CPU: 1 PID: 257 at fs/ext4/ext4_jbd2.c:271 __ext4_handle_dirty_metadata+0x10c/0x180 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work RIP: 0010:__ext4_handle_dirty_metadata+0x10c/0x180 ... EXT4-fs: ext4_free_blocks:4938: aborting transaction: error 28 in __ext4_handle_dirty_metadata EXT4: jbd2_journal_dirty_metadata failed: handle type 11 started at line 4921, credits 4/0, errcode -28 EXT4-fs error (device dm-1) in ext4_free_blocks:4950: error 28 Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- fs/ext4/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2579,7 +2579,8 @@ static int ext4_writepages(struct addres * We may need to convert up to one extent per block in * the page and we may dirty the inode. */ - rsv_blocks = 1 + (PAGE_CACHE_SIZE >> inode->i_blkbits); + rsv_blocks = 1 + ext4_chunk_trans_blocks(inode, + PAGE_CACHE_SIZE >> inode->i_blkbits); } /*
