Patchwork [2/2] block: disable I/O throttling on sync api

login
register
mail settings
Submitter Zhiyong Wu
Date March 27, 2012, 4:35 a.m.
Message ID <1332822914-31566-1-git-send-email-zwu.kernel@gmail.com>
Download mbox | patch
Permalink /patch/148857/
State New
Headers show

Comments

Zhiyong Wu - March 27, 2012, 4:35 a.m.
From: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>

Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
---
 block.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

Patch

diff --git a/block.c b/block.c
index 1fbf4dd..5baf340 100644
--- a/block.c
+++ b/block.c
@@ -1477,6 +1477,12 @@  static int bdrv_rw_co(BlockDriverState *bs, int64_t sector_num, uint8_t *buf,
 
     qemu_iovec_init_external(&qiov, &iov, 1);
 
+    if (bs->io_limits_enabled) {
+        fprintf(stderr, "Disabling I/O throttling on '%s' due "
+                        "to synchronous I/O.\n", bdrv_get_device_name(bs));
+        bdrv_io_limits_disable(bs);
+    }
+
     if (qemu_in_coroutine()) {
         /* Fast-path if already in coroutine context */
         bdrv_rw_co_entry(&rwco);