diff options
author | Christoph Hellwig <hch@infradead.org> | 2010-08-18 09:29:11 (GMT) |
---|---|---|
committer | Jens Axboe <jaxboe@fusionio.com> | 2010-09-10 10:35:38 (GMT) |
commit | 80f6c29d8a758650d5c9eac05074b4b3e8c266df (patch) | |
tree | a08a3c49536e382a8f3e473c98d08613a0ac82fa /fs | |
parent | 2cf6d26a354ab6362e301b5a323832b02867df47 (diff) | |
download | linux-fsl-qoriq-80f6c29d8a758650d5c9eac05074b4b3e8c266df.tar.xz |
xfs: replace barriers with explicit flush / FUA usage
Switch to the WRITE_FLUSH_FUA flag for log writes and remove the EOPNOTSUPP
detection for barriers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/xfs/linux-2.6/xfs_buf.c | 16 | ||||
-rw-r--r-- | fs/xfs/linux-2.6/xfs_buf.h | 11 | ||||
-rw-r--r-- | fs/xfs/linux-2.6/xfs_trace.h | 1 | ||||
-rw-r--r-- | fs/xfs/xfs_log.c | 13 |
4 files changed, 3 insertions, 38 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index ea79072..b93ea33 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -929,19 +929,7 @@ xfs_buf_iodone_work( xfs_buf_t *bp = container_of(work, xfs_buf_t, b_iodone_work); - /* - * We can get an EOPNOTSUPP to ordered writes. Here we clear the - * ordered flag and reissue them. Because we can't tell the higher - * layers directly that they should not issue ordered I/O anymore, they - * need to check if the _XFS_BARRIER_FAILED flag was set during I/O completion. - */ - if ((bp->b_error == EOPNOTSUPP) && - (bp->b_flags & (XBF_ORDERED|XBF_ASYNC)) == (XBF_ORDERED|XBF_ASYNC)) { - trace_xfs_buf_ordered_retry(bp, _RET_IP_); - bp->b_flags &= ~XBF_ORDERED; - bp->b_flags |= _XFS_BARRIER_FAILED; - xfs_buf_iorequest(bp); - } else if (bp->b_iodone) + if (bp->b_iodone) (*(bp->b_iodone))(bp); else if (bp->b_flags & XBF_ASYNC) xfs_buf_relse(bp); @@ -1200,7 +1188,7 @@ _xfs_buf_ioapply( if (bp->b_flags & XBF_ORDERED) { ASSERT(!(bp->b_flags & XBF_READ)); - rw = WRITE_BARRIER; + rw = WRITE_FLUSH_FUA; } else if (bp->b_flags & XBF_LOG_BUFFER) { ASSERT(!(bp->b_flags & XBF_READ_AHEAD)); bp->b_flags &= ~_XBF_RUN_QUEUES; diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index d072e5f..d533d64 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -86,14 +86,6 @@ typedef enum { */ #define _XBF_PAGE_LOCKED (1 << 22) -/* - * If we try a barrier write, but it fails we have to communicate - * this to the upper layers. Unfortunately b_error gets overwritten - * when the buffer is re-issued so we have to add another flag to - * keep this information. - */ -#define _XFS_BARRIER_FAILED (1 << 23) - typedef unsigned int xfs_buf_flags_t; #define XFS_BUF_FLAGS \ @@ -114,8 +106,7 @@ typedef unsigned int xfs_buf_flags_t; { _XBF_PAGES, "PAGES" }, \ { _XBF_RUN_QUEUES, "RUN_QUEUES" }, \ { _XBF_DELWRI_Q, "DELWRI_Q" }, \ - { _XBF_PAGE_LOCKED, "PAGE_LOCKED" }, \ - { _XFS_BARRIER_FAILED, "BARRIER_FAILED" } + { _XBF_PAGE_LOCKED, "PAGE_LOCKED" } typedef enum { diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index be5dffd..8fe311a 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -325,7 +325,6 @@ DEFINE_BUF_EVENT(xfs_buf_lock); DEFINE_BUF_EVENT(xfs_buf_lock_done); DEFINE_BUF_EVENT(xfs_buf_cond_lock); DEFINE_BUF_EVENT(xfs_buf_unlock); -DEFINE_BUF_EVENT(xfs_buf_ordered_retry); DEFINE_BUF_EVENT(xfs_buf_iowait); DEFINE_BUF_EVENT(xfs_buf_iowait_done); DEFINE_BUF_EVENT(xfs_buf_delwri_queue); diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 925d572..430a8fc 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -917,19 +917,6 @@ xlog_iodone(xfs_buf_t *bp) l = iclog->ic_log; /* - * If the _XFS_BARRIER_FAILED flag was set by a lower - * layer, it means the underlying device no longer supports - * barrier I/O. Warn loudly and turn off barriers. - */ - if (bp->b_flags & _XFS_BARRIER_FAILED) { - bp->b_flags &= ~_XFS_BARRIER_FAILED; - l->l_mp->m_flags &= ~XFS_MOUNT_BARRIER; - xfs_fs_cmn_err(CE_WARN, l->l_mp, - "xlog_iodone: Barriers are no longer supported" - " by device. Disabling barriers\n"); - } - - /* * Race to shutdown the filesystem if we see an error. */ if (XFS_TEST_ERROR((XFS_BUF_GETERROR(bp)), l->l_mp, |