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[Qemu-devel] [PATCH 04/41] xen_disk: remove dead code
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 04/41] xen_disk: remove dead code |
Date: |
Mon, 5 Dec 2011 15:20:41 +0100 |
From: Paolo Bonzini <address@hidden>
Xen_disk.c has support for using synchronous I/O instead of asynchronous,
but it is compiled out by default. Remove it.
Signed-off-by: Paolo Bonzini <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
hw/xen_disk.c | 86 +-------------------------------------------------------
1 files changed, 2 insertions(+), 84 deletions(-)
diff --git a/hw/xen_disk.c b/hw/xen_disk.c
index 286bbac..192e817 100644
--- a/hw/xen_disk.c
+++ b/hw/xen_disk.c
@@ -49,7 +49,6 @@ static int syncwrite = 0;
static int batch_maps = 0;
static int max_requests = 32;
-static int use_aio = 1;
/* ------------------------------------------------------------- */
@@ -314,76 +313,6 @@ static int ioreq_map(struct ioreq *ioreq)
return 0;
}
-static int ioreq_runio_qemu_sync(struct ioreq *ioreq)
-{
- struct XenBlkDev *blkdev = ioreq->blkdev;
- int i, rc;
- off_t pos;
-
- if (ioreq->req.nr_segments && ioreq_map(ioreq) == -1) {
- goto err_no_map;
- }
- if (ioreq->presync) {
- bdrv_flush(blkdev->bs);
- }
-
- switch (ioreq->req.operation) {
- case BLKIF_OP_READ:
- pos = ioreq->start;
- for (i = 0; i < ioreq->v.niov; i++) {
- rc = bdrv_read(blkdev->bs, pos / BLOCK_SIZE,
- ioreq->v.iov[i].iov_base,
- ioreq->v.iov[i].iov_len / BLOCK_SIZE);
- if (rc != 0) {
- xen_be_printf(&blkdev->xendev, 0, "rd I/O error (%p, len
%zd)\n",
- ioreq->v.iov[i].iov_base,
- ioreq->v.iov[i].iov_len);
- goto err;
- }
- pos += ioreq->v.iov[i].iov_len;
- }
- break;
- case BLKIF_OP_WRITE:
- case BLKIF_OP_WRITE_BARRIER:
- if (!ioreq->req.nr_segments) {
- break;
- }
- pos = ioreq->start;
- for (i = 0; i < ioreq->v.niov; i++) {
- rc = bdrv_write(blkdev->bs, pos / BLOCK_SIZE,
- ioreq->v.iov[i].iov_base,
- ioreq->v.iov[i].iov_len / BLOCK_SIZE);
- if (rc != 0) {
- xen_be_printf(&blkdev->xendev, 0, "wr I/O error (%p, len
%zd)\n",
- ioreq->v.iov[i].iov_base,
- ioreq->v.iov[i].iov_len);
- goto err;
- }
- pos += ioreq->v.iov[i].iov_len;
- }
- break;
- default:
- /* unknown operation (shouldn't happen -- parse catches this) */
- goto err;
- }
-
- if (ioreq->postsync) {
- bdrv_flush(blkdev->bs);
- }
- ioreq->status = BLKIF_RSP_OKAY;
-
- ioreq_unmap(ioreq);
- ioreq_finish(ioreq);
- return 0;
-
-err:
- ioreq_unmap(ioreq);
-err_no_map:
- ioreq_finish(ioreq);
- ioreq->status = BLKIF_RSP_ERROR;
- return -1;
-}
-
static void qemu_aio_complete(void *opaque, int ret)
{
struct ioreq *ioreq = opaque;
@@ -554,9 +483,7 @@ static void blk_handle_requests(struct XenBlkDev *blkdev)
rp = blkdev->rings.common.sring->req_prod;
xen_rmb(); /* Ensure we see queued requests up to 'rp'. */
- if (use_aio) {
- blk_send_response_all(blkdev);
- }
+ blk_send_response_all(blkdev);
while (rc != rp) {
/* pull request from ring */
if (RING_REQUEST_CONS_OVERFLOW(&blkdev->rings.common, rc)) {
@@ -579,16 +506,7 @@ static void blk_handle_requests(struct XenBlkDev *blkdev)
continue;
}
- if (use_aio) {
- /* run i/o in aio mode */
- ioreq_runio_qemu_aio(ioreq);
- } else {
- /* run i/o in sync mode */
- ioreq_runio_qemu_sync(ioreq);
- }
- }
- if (!use_aio) {
- blk_send_response_all(blkdev);
+ ioreq_runio_qemu_aio(ioreq);
}
if (blkdev->more_work && blkdev->requests_inflight < max_requests) {
--
1.7.6.4
- [Qemu-devel] [PULL 00/41] Block patches, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 01/41] qcow2: Unlock during COW, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 08/41] block: add I/O throttling algorithm, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 07/41] CoQueue: introduce qemu_co_queue_wait_insert_head, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 05/41] block: Use bdrv functions to replace file operation in cow.c, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 04/41] xen_disk: remove dead code,
Kevin Wolf <=
- [Qemu-devel] [PATCH 06/41] block: add the blockio limits command line support, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 02/41] qcow2: avoid reentrant bdrv_read() in copy_sectors(), Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 03/41] qed: adjust the way to get nb_sectors, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 13/41] qcow2: Update snapshot table information at once, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 15/41] qcow2: Rework qcow2_snapshot_create error handling, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 10/41] block: Add coroutine_fn marker to coroutine functions, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 09/41] hmp/qmp: add block_set_io_throttle, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 12/41] qcow2: Return real error code in qcow2_write_snapshots, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 11/41] qcow2: Return real error code in qcow2_read_snapshots, Kevin Wolf, 2011/12/05
- [Qemu-devel] [PATCH 14/41] qcow2: Cleanups and memleak fix in qcow2_snapshot_create, Kevin Wolf, 2011/12/05