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From: linhaifeng <haifeng.lin@huawei.com>
To: <dev@dpdk.org>
Subject: [dpdk-dev] [PATCH] cast used->idx to volatile
Date: Sat, 21 Mar 2015 16:07:17 +0800
Message-ID: <1426925237-8312-1-git-send-email-haifeng.lin@huawei.com> (raw)

From: Linhaifeng <haifeng.lin@huawei.com>

Same as rte_vhost_enqueue_burst we should cast used->idx
to volatile before notify guest.

Signed-off-by: Linhaifeng <haifeng.lin@huawei.com>
---
 lib/librte_vhost/vhost_rxtx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index 535c7a1..8d674d1 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -722,7 +722,7 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id,
 	}
 
 	rte_compiler_barrier();
-	vq->used->idx += entry_success;
+	*(volatile uint16_t *)&vq->used->idx += entry_success;
 	/* Kick guest if required. */
 	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
 		eventfd_write((int)vq->callfd, 1);
-- 
1.8.5.2.msysgit.0

             reply	other threads:[~2015-03-21  8:07 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-21  8:07 linhaifeng [this message]
2015-03-23  2:29 ` Linhaifeng
2015-03-23 12:23 ` Linhaifeng
2015-03-23 12:54   ` Xie, Huawei
2015-03-24  0:59     ` Linhaifeng
2015-03-24  1:53       ` Xie, Huawei
2015-03-24  7:43         ` Linhaifeng
2015-03-24 10:06           ` Xie, Huawei
2015-03-24 12:28             ` Linhaifeng
2015-03-30  9:20             ` Linhaifeng
2015-03-30 15:56               ` Xie, Huawei
2015-04-01  7:50                 ` Thomas Monjalon
2015-04-01 14:40                   ` Xie, Huawei

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