From: linhaifeng <haifeng.lin-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
To: <dev-VfR2kkLFssw@public.gmane.org>
Subject: [PATCH] cast used->idx to volatile
Date: Sat, 21 Mar 2015 16:07:17 +0800 [thread overview]
Message-ID: <1426925237-8312-1-git-send-email-haifeng.lin@huawei.com> (raw)
From: Linhaifeng <haifeng.lin-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Same as rte_vhost_enqueue_burst we should cast used->idx
to volatile before notify guest.
Signed-off-by: Linhaifeng <haifeng.lin-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
---
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
next 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]
[not found] ` <1426925237-8312-1-git-send-email-haifeng.lin-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-03-23 2:29 ` [PATCH] cast used->idx to volatile Linhaifeng
2015-03-23 12:23 ` Linhaifeng
[not found] ` <551005DD.4060508-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-03-23 12:54 ` Xie, Huawei
[not found] ` <C37D651A908B024F974696C65296B57B0F3F14D3-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-03-24 0:59 ` Linhaifeng
2015-03-24 1:53 ` Xie, Huawei
[not found] ` <C37D651A908B024F974696C65296B57B0F3F3F2B-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-03-24 7:43 ` Linhaifeng
2015-03-24 10:06 ` Xie, Huawei
[not found] ` <C37D651A908B024F974696C65296B57B0F3F4DDD-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-03-24 12:28 ` Linhaifeng
2015-03-30 9:20 ` Linhaifeng
2015-03-30 15:56 ` Xie, Huawei
[not found] ` <C37D651A908B024F974696C65296B57B0F417D44-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-04-01 7:50 ` Thomas Monjalon
2015-04-01 14:40 ` Xie, Huawei
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