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| author | Dave Chinner <dgc@sgi.com> | 2009-11-24 18:03:15 +0000 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2009-12-16 13:41:19 -0600 |
| commit | 2ee1abad73a12df5521cd3f017f081f1f684a361 (patch) | |
| tree | e44a88b0ae7f01d339426d7a6d18bde017bb9cf1 /fs/xfs/xfs_log.c | |
| parent | b44b1126279b60597f96bbe77507b1650f88a969 (diff) | |
| download | talos-obmc-linux-2ee1abad73a12df5521cd3f017f081f1f684a361.tar.gz talos-obmc-linux-2ee1abad73a12df5521cd3f017f081f1f684a361.zip | |
xfs: improve metadata I/O merging in the elevator
Change all async metadata buffers to use [READ|WRITE]_META I/O types
so that the I/O doesn't get issued immediately. This allows merging of
adjacent metadata requests but still prioritises them over bulk data.
This shows a 10-15% improvement in sequential create speed of small
files.
Don't include the log buffers in this classification - leave them as
sync types so they are issued immediately.
Signed-off-by: Dave Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_log.c')
| -rw-r--r-- | fs/xfs/xfs_log.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 4cb1792040e3..600b5b06aaeb 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -1441,6 +1441,7 @@ xlog_sync(xlog_t *log, XFS_BUF_ZEROFLAGS(bp); XFS_BUF_BUSY(bp); XFS_BUF_ASYNC(bp); + bp->b_flags |= XBF_LOG_BUFFER; /* * Do an ordered write for the log block. * Its unnecessary to flush the first split block in the log wrap case. @@ -1478,6 +1479,7 @@ xlog_sync(xlog_t *log, XFS_BUF_ZEROFLAGS(bp); XFS_BUF_BUSY(bp); XFS_BUF_ASYNC(bp); + bp->b_flags |= XBF_LOG_BUFFER; if (log->l_mp->m_flags & XFS_MOUNT_BARRIER) XFS_BUF_ORDERED(bp); dptr = XFS_BUF_PTR(bp); |
