From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:50963) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SCPOj-0004ns-9a for qemu-devel@nongnu.org; Tue, 27 Mar 2012 01:56:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SCPOg-0001rL-Tj for qemu-devel@nongnu.org; Tue, 27 Mar 2012 01:56:48 -0400 Received: from e32.co.us.ibm.com ([32.97.110.150]:44994) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SCPOg-0001qu-N9 for qemu-devel@nongnu.org; Tue, 27 Mar 2012 01:56:46 -0400 Received: from /spool/local by e32.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 26 Mar 2012 23:56:43 -0600 Received: from d03relay03.boulder.ibm.com (d03relay03.boulder.ibm.com [9.17.195.228]) by d03dlp02.boulder.ibm.com (Postfix) with ESMTP id 471793E40036 for ; Mon, 26 Mar 2012 23:56:26 -0600 (MDT) Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d03relay03.boulder.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q2R5uPEA164034 for ; Mon, 26 Mar 2012 23:56:26 -0600 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q2R5uMtf029256 for ; Mon, 26 Mar 2012 23:56:24 -0600 From: zwu.kernel@gmail.com Date: Tue, 27 Mar 2012 13:56:13 +0800 Message-Id: <1332827773-32358-1-git-send-email-zwu.kernel@gmail.com> Subject: [Qemu-devel] [PATCH 2/2] block: disable I/O throttling on sync api List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, stefanha@linux.vnet.ibm.com, kvm@vger.kernel.org, zwu.kernel@gmail.com, Zhi Yong Wu , pbonzini@redhat.com From: Zhi Yong Wu Signed-off-by: Stefan Hajnoczi Signed-off-by: Zhi Yong Wu --- block.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) 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); -- 1.7.6