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authorChristoph Hellwig <hch@infradead.org>2011-08-23 08:28:13 +0000
committerAlex Elder <aelder@sgi.com>2011-10-11 21:15:01 -0500
commit4a06fd262dbeb70a2c315f7259e063efa493fe3d (patch)
treecca4aee6c419a8b3dc267176bb43d93048593919 /fs/xfs/xfs_aops.c
parent2b3ffd7eb7b4392e3657c5046b055ca9f1f7cf5e (diff)
xfs: remove i_iocount
We now have an i_dio_count filed and surrounding infrastructure to wait for direct I/O completion instead of i_icount, and we have never needed to iocount waits for buffered I/O given that we only set the page uptodate after finishing all required work. Thus remove i_iocount, and replace the actually needed waits with calls to inode_dio_wait. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_aops.c')
-rw-r--r--fs/xfs/xfs_aops.c39
1 files changed, 1 insertions, 38 deletions
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index e1ff0770784e..46bba3e0af47 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -38,40 +38,6 @@
#include <linux/pagevec.h>
#include <linux/writeback.h>
-
-/*
- * Prime number of hash buckets since address is used as the key.
- */
-#define NVSYNC 37
-#define to_ioend_wq(v) (&xfs_ioend_wq[((unsigned long)v) % NVSYNC])
-static wait_queue_head_t xfs_ioend_wq[NVSYNC];
-
-void __init
-xfs_ioend_init(void)
-{
- int i;
-
- for (i = 0; i < NVSYNC; i++)
- init_waitqueue_head(&xfs_ioend_wq[i]);
-}
-
-void
-xfs_ioend_wait(
- xfs_inode_t *ip)
-{
- wait_queue_head_t *wq = to_ioend_wq(ip);
-
- wait_event(*wq, (atomic_read(&ip->i_iocount) == 0));
-}
-
-STATIC void
-xfs_ioend_wake(
- xfs_inode_t *ip)
-{
- if (atomic_dec_and_test(&ip->i_iocount))
- wake_up(to_ioend_wq(ip));
-}
-
void
xfs_count_page_state(
struct page *page,
@@ -115,7 +81,6 @@ xfs_destroy_ioend(
xfs_ioend_t *ioend)
{
struct buffer_head *bh, *next;
- struct xfs_inode *ip = XFS_I(ioend->io_inode);
for (bh = ioend->io_buffer_head; bh; bh = next) {
next = bh->b_private;
@@ -127,7 +92,7 @@ xfs_destroy_ioend(
aio_complete(ioend->io_iocb, ioend->io_result, 0);
inode_dio_done(ioend->io_inode);
}
- xfs_ioend_wake(ip);
+
mempool_free(ioend, xfs_ioend_pool);
}
@@ -298,7 +263,6 @@ xfs_alloc_ioend(
ioend->io_inode = inode;
ioend->io_buffer_head = NULL;
ioend->io_buffer_tail = NULL;
- atomic_inc(&XFS_I(ioend->io_inode)->i_iocount);
ioend->io_offset = 0;
ioend->io_size = 0;
ioend->io_iocb = NULL;
@@ -558,7 +522,6 @@ xfs_cancel_ioend(
unlock_buffer(bh);
} while ((bh = next_bh) != NULL);
- xfs_ioend_wake(XFS_I(ioend->io_inode));
mempool_free(ioend, xfs_ioend_pool);
} while ((ioend = next) != NULL);
}