From: Dave Chinner <dchinner@xxxxxxxxxx>
We do some work in xfs_buf_ioend, and some work in
xfs_buf_iodone_work, but much of that functionality is the same.
This work can all be done in a single function, leaving
xfs_buf_iodone just a wrapper to determine if we should execute it
by workqueue or directly. hence rename xfs_buf_iodone_work to
xfs_buf_ioend(), and add a new xfs_buf_ioend_async() for places that
need async processing.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
fs/xfs/xfs_buf.c | 88 +++++++++++++++++++++---------------------------
fs/xfs/xfs_buf.h | 2 +-
fs/xfs/xfs_buf_item.c | 4 +--
fs/xfs/xfs_inode.c | 2 +-
fs/xfs/xfs_log.c | 2 +-
fs/xfs/xfs_log_recover.c | 2 +-
6 files changed, 45 insertions(+), 55 deletions(-)
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 5d8d2e1..08f9fca 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -998,26 +998,30 @@ xfs_buf_wait_unpin(
* Buffer Utility Routines
*/
-STATIC void
-xfs_buf_iodone_work(
- struct work_struct *work)
+void
+xfs_buf_ioend(
+ struct xfs_buf *bp)
{
- struct xfs_buf *bp =
- container_of(work, xfs_buf_t, b_iodone_work);
- bool read = !!(bp->b_flags & XBF_READ);
+ bool read = bp->b_flags & XBF_READ;
+
+ trace_xfs_buf_iodone(bp, _RET_IP_);
bp->b_flags &= ~(XBF_READ | XBF_WRITE | XBF_READ_AHEAD);
- /* only validate buffers that were read without errors */
- if (read && bp->b_ops && !bp->b_error && (bp->b_flags & XBF_DONE))
+ /* Only validate buffers that were read without errors */
+ if (read && !bp->b_error && bp->b_ops) {
+ ASSERT(!bp->b_iodone);
bp->b_ops->verify_read(bp);
+ }
+
+ if (!bp->b_error)
+ bp->b_flags |= XBF_DONE;
if (bp->b_iodone)
(*(bp->b_iodone))(bp);
else if (bp->b_flags & XBF_ASYNC)
xfs_buf_relse(bp);
else {
- ASSERT(read && bp->b_ops);
complete(&bp->b_iowait);
/* release the !XBF_ASYNC ref now we are done. */
@@ -1025,30 +1029,22 @@ xfs_buf_iodone_work(
}
}
-void
-xfs_buf_ioend(
- struct xfs_buf *bp,
- int schedule)
+static void
+xfs_buf_ioend_work(
+ struct work_struct *work)
{
- bool read = !!(bp->b_flags & XBF_READ);
-
- trace_xfs_buf_iodone(bp, _RET_IP_);
+ struct xfs_buf *bp =
+ container_of(work, xfs_buf_t, b_iodone_work);
- if (bp->b_error == 0)
- bp->b_flags |= XBF_DONE;
+ xfs_buf_ioend(bp);
+}
- if (bp->b_iodone || (read && bp->b_ops) || (bp->b_flags & XBF_ASYNC)) {
- if (schedule) {
- INIT_WORK(&bp->b_iodone_work, xfs_buf_iodone_work);
- queue_work(xfslogd_workqueue, &bp->b_iodone_work);
- } else {
- xfs_buf_iodone_work(&bp->b_iodone_work);
- }
- } else {
- bp->b_flags &= ~(XBF_READ | XBF_WRITE | XBF_READ_AHEAD);
- complete(&bp->b_iowait);
- xfs_buf_rele(bp);
- }
+void
+xfs_buf_ioend_async(
+ struct xfs_buf *bp)
+{
+ INIT_WORK(&bp->b_iodone_work, xfs_buf_ioend_work);
+ queue_work(xfslogd_workqueue, &bp->b_iodone_work);
}
void
@@ -1099,7 +1095,7 @@ xfs_bioerror(
XFS_BUF_UNDONE(bp);
xfs_buf_stale(bp);
- xfs_buf_ioend(bp, 0);
+ xfs_buf_ioend(bp);
return -EIO;
}
@@ -1186,15 +1182,6 @@ xfs_bwrite(
}
STATIC void
-_xfs_buf_ioend(
- xfs_buf_t *bp,
- int schedule)
-{
- if (atomic_dec_and_test(&bp->b_io_remaining) == 1)
- xfs_buf_ioend(bp, schedule);
-}
-
-STATIC void
xfs_buf_bio_end_io(
struct bio *bio,
int error)
@@ -1211,7 +1198,8 @@ xfs_buf_bio_end_io(
if (!bp->b_error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ))
invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp));
- _xfs_buf_ioend(bp, 1);
+ if (atomic_dec_and_test(&bp->b_io_remaining) == 1)
+ xfs_buf_ioend_async(bp);
bio_put(bio);
}
@@ -1423,15 +1411,17 @@ xfs_buf_iorequest(
/*
* If _xfs_buf_ioapply failed or we are doing synchronous IO that
* completes extremely quickly, we can get back here with only the IO
- * reference we took above. _xfs_buf_ioend will drop it to zero. Run
- * completion processing synchronously so that we don't return to the
- * caller with completion still pending. This avoids unnecessary context
- * switches associated with the end_io workqueue.
+ * reference we took above. If we drop it to zero, run completion
+ * processing synchronously so that we don't return to the caller with
+ * completion still pending. This avoids unnecessary context switches
+ * associated with the end_io workqueue.
*/
- if (bp->b_error || !(bp->b_flags & XBF_ASYNC))
- _xfs_buf_ioend(bp, 0);
- else
- _xfs_buf_ioend(bp, 1);
+ if (atomic_dec_and_test(&bp->b_io_remaining) == 1) {
+ if (bp->b_error || !(bp->b_flags & XBF_ASYNC))
+ xfs_buf_ioend(bp);
+ else
+ xfs_buf_ioend_async(bp);
+ }
xfs_buf_rele(bp);
}
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index c753183..4585c15 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -286,7 +286,7 @@ extern void xfs_buf_unlock(xfs_buf_t *);
/* Buffer Read and Write Routines */
extern int xfs_bwrite(struct xfs_buf *bp);
-extern void xfs_buf_ioend(xfs_buf_t *, int);
+extern void xfs_buf_ioend(struct xfs_buf *bp);
extern void xfs_buf_ioerror(xfs_buf_t *, int);
extern void xfs_buf_ioerror_alert(struct xfs_buf *, const char *func);
extern void xfs_buf_iorequest(xfs_buf_t *);
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 30fa5db..3916384 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -491,7 +491,7 @@ xfs_buf_item_unpin(
xfs_buf_ioerror(bp, -EIO);
XFS_BUF_UNDONE(bp);
xfs_buf_stale(bp);
- xfs_buf_ioend(bp, 0);
+ xfs_buf_ioend(bp);
}
}
@@ -1115,7 +1115,7 @@ do_callbacks:
xfs_buf_do_callbacks(bp);
bp->b_fspriv = NULL;
bp->b_iodone = NULL;
- xfs_buf_ioend(bp, 0);
+ xfs_buf_ioend(bp);
}
/*
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index c92cb48..e5bbc1f 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3062,7 +3062,7 @@ cluster_corrupt_out:
XFS_BUF_UNDONE(bp);
xfs_buf_stale(bp);
xfs_buf_ioerror(bp, -EIO);
- xfs_buf_ioend(bp, 0);
+ xfs_buf_ioend(bp);
} else {
xfs_buf_stale(bp);
xfs_buf_relse(bp);
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index a598955..b5170e5 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1689,7 +1689,7 @@ xlog_bdstrat(
if (iclog->ic_state & XLOG_STATE_IOERROR) {
xfs_buf_ioerror(bp, -EIO);
xfs_buf_stale(bp);
- xfs_buf_ioend(bp, 0);
+ xfs_buf_ioend(bp);
/*
* It would seem logical to return EIO here, but we rely on
* the log state machine to propagate I/O errors instead of
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 29e101f..02ad115 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -383,7 +383,7 @@ xlog_recover_iodone(
SHUTDOWN_META_IO_ERROR);
}
bp->b_iodone = NULL;
- xfs_buf_ioend(bp, 0);
+ xfs_buf_ioend(bp);
}
/*
--
2.0.0
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