xfs: use per-filesystem I/O completion workqueues
The new concurrency managed workqueues are cheap enough that we can create
per-filesystem instead of global workqueues. This allows us to remove the
trylock or defer scheme on the ilock, which is not helpful once we have
outstanding log reservations until finishing a size update.
Also allow the default concurrency on this workqueues so that I/O completions
blocking on the ilock for one inode do not block process for another inode.
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 74b9baf..540a0174 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -126,21 +126,15 @@
/*
* Update on-disk file size now that data has been written to disk.
- *
- * This function does not block as blocking on the inode lock in IO completion
- * can lead to IO completion order dependency deadlocks.. If it can't get the
- * inode ilock it will return EAGAIN. Callers must handle this.
*/
-STATIC int
+STATIC void
xfs_setfilesize(
- xfs_ioend_t *ioend)
+ struct xfs_ioend *ioend)
{
- xfs_inode_t *ip = XFS_I(ioend->io_inode);
+ struct xfs_inode *ip = XFS_I(ioend->io_inode);
xfs_fsize_t isize;
- if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL))
- return EAGAIN;
-
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
isize = xfs_ioend_new_eof(ioend);
if (isize) {
trace_xfs_setfilesize(ip, ioend->io_offset, ioend->io_size);
@@ -149,7 +143,6 @@
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
- return 0;
}
/*
@@ -163,10 +156,12 @@
struct xfs_ioend *ioend)
{
if (atomic_dec_and_test(&ioend->io_remaining)) {
+ struct xfs_mount *mp = XFS_I(ioend->io_inode)->i_mount;
+
if (ioend->io_type == IO_UNWRITTEN)
- queue_work(xfsconvertd_workqueue, &ioend->io_work);
+ queue_work(mp->m_unwritten_workqueue, &ioend->io_work);
else if (xfs_ioend_is_append(ioend))
- queue_work(xfsdatad_workqueue, &ioend->io_work);
+ queue_work(mp->m_data_workqueue, &ioend->io_work);
else
xfs_destroy_ioend(ioend);
}
@@ -207,23 +202,9 @@
* We might have to update the on-disk file size after extending
* writes.
*/
- error = xfs_setfilesize(ioend);
- ASSERT(!error || error == EAGAIN);
-
+ xfs_setfilesize(ioend);
done:
- /*
- * If we didn't complete processing of the ioend, requeue it to the
- * tail of the workqueue for another attempt later. Otherwise destroy
- * it.
- */
- if (error == EAGAIN) {
- atomic_inc(&ioend->io_remaining);
- xfs_finish_ioend(ioend);
- /* ensure we don't spin on blocked ioends */
- delay(1);
- } else {
- xfs_destroy_ioend(ioend);
- }
+ xfs_destroy_ioend(ioend);
}
/*
