xfs: log stripe roundoff is a property of the log

Source kernel commit: a6a65fef5ef8d0a6a0ce514eb66b2f3dfa777b48

We don't need to look at the xfs_mount and superblock every time we
need to do an iclog roundoff calculation. The property is fixed for
the life of the log, so store the roundoff in the log at mount time
and use that everywhere.

On a debug build:

$ size fs/xfs/xfs_log.o.*
text    data     bss     dec     hex filename
27360     560       8   27928    6d18 fs/xfs/xfs_log.o.orig
27219     560       8   27787    6c8b fs/xfs/xfs_log.o.patched

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

diff --git a/libxfs/xfs_log_format.h b/libxfs/xfs_log_format.h
index 3e15ea29fb8de6c29c5a1a723b88209270d548de..d548ea4b6aab617f6b6ad1a60e3fda95e816b4a4 100644 (file)
--- a/libxfs/xfs_log_format.h
+++ b/libxfs/xfs_log_format.h
@@ -34,9 +34,6 @@ typedef uint32_t xlog_tid_t;
 #define XLOG_MIN_RECORD_BSHIFT 14              /* 16384 == 1 << 14 */
 #define XLOG_BIG_RECORD_BSHIFT 15              /* 32k == 1 << 15 */
 #define XLOG_MAX_RECORD_BSHIFT 18              /* 256k == 1 << 18 */
-#define XLOG_BTOLSUNIT(log, b)  (((b)+(log)->l_mp->m_sb.sb_logsunit-1) / \
-                                 (log)->l_mp->m_sb.sb_logsunit)
-#define XLOG_LSUNITTOB(log, su) ((su) * (log)->l_mp->m_sb.sb_logsunit)
 
 #define XLOG_HEADER_SIZE       512