There is no reason to queue up ioends for processing in user context
unless we actually need it. Just complete ioends that do not convert
unwritten extents or need a size update from the end_io context.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Index: xfs/fs/xfs/xfs_aops.c
===================================================================
--- xfs.orig/fs/xfs/xfs_aops.c 2011-08-13 10:57:57.559366326 -0700
+++ xfs/fs/xfs/xfs_aops.c 2011-08-13 10:57:57.979364052 -0700
@@ -150,6 +150,15 @@ xfs_ioend_new_eof(
}
/*
+ * Fast and loose check if this write could update the on-disk inode size.
+ */
+static inline bool xfs_ioend_is_append(struct xfs_ioend *ioend)
+{
+ return ioend->io_offset + ioend->io_size >
+ XFS_I(ioend->io_inode)->i_d.di_size;
+}
+
+/*
* Update on-disk file size now that data has been written to disk. The
* current in-memory file size is i_size. If a write is beyond eof i_new_size
* will be the intended file size until i_size is updated. If this write does
@@ -186,6 +195,9 @@ xfs_setfilesize(
/*
* Schedule IO completion handling on the final put of an ioend.
+ *
+ * If there is no work to do we might as well call it a day and free the
+ * ioend right now.
*/
STATIC void
xfs_finish_ioend(
@@ -194,8 +206,10 @@ xfs_finish_ioend(
if (atomic_dec_and_test(&ioend->io_remaining)) {
if (ioend->io_type == IO_UNWRITTEN)
queue_work(xfsconvertd_workqueue, &ioend->io_work);
- else
+ else if (xfs_ioend_is_append(ioend))
queue_work(xfsdatad_workqueue, &ioend->io_work);
+ else
+ xfs_destroy_ioend(ioend);
}
}
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