From 6b523df4fb5ae281ddbc817f40504b33e6226554 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Tue, 4 Jun 2013 13:21:11 -0400 Subject: ext4: use transaction reservation for extent conversion in ext4_end_io Later we would like to clear PageWriteback bit only after extent conversion from unwritten to written extents is performed. However it is not possible to start a transaction after PageWriteback is set because that violates lock ordering (and is easy to deadlock). So we have to reserve a transaction before locking pages and sending them for IO and later we use the transaction for extent conversion from ext4_end_io(). Reviewed-by: Zheng Liu Signed-off-by: Jan Kara Signed-off-by: "Theodore Ts'o" --- fs/ext4/ext4_jbd2.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/ext4/ext4_jbd2.h') diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h index fdd865eb1879..2877258d9497 100644 --- a/fs/ext4/ext4_jbd2.h +++ b/fs/ext4/ext4_jbd2.h @@ -134,7 +134,8 @@ static inline int ext4_jbd2_credits_xattr(struct inode *inode) #define EXT4_HT_MIGRATE 8 #define EXT4_HT_MOVE_EXTENTS 9 #define EXT4_HT_XATTR 10 -#define EXT4_HT_MAX 11 +#define EXT4_HT_EXT_CONVERT 11 +#define EXT4_HT_MAX 12 /** * struct ext4_journal_cb_entry - Base structure for callback information. @@ -319,7 +320,7 @@ static inline handle_t *__ext4_journal_start(struct inode *inode, #define ext4_journal_stop(handle) \ __ext4_journal_stop(__func__, __LINE__, (handle)) -#define ext4_journal_start_reserve(handle, type) \ +#define ext4_journal_start_reserved(handle, type) \ __ext4_journal_start_reserved((handle), __LINE__, (type)) handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line, -- cgit v1.2.3-59-g8ed1b