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From: Cheng Jiang <Cheng1.jiang@intel.com>
To: maxime.coquelin@redhat.com, chenbo.xia@intel.com
Cc: dev@dpdk.org, jiayu.hu@intel.com, yvonnex.yang@intel.com,
	yinan.wang@intel.com, Cheng Jiang <Cheng1.jiang@intel.com>,
	stable@dpdk.org
Subject: [dpdk-stable] [PATCH] examples/vhost: fix ioat ring space in callbacks
Date: Wed, 17 Mar 2021 05:40:54 +0000
Message-ID: <20210317054054.34616-1-Cheng1.jiang@intel.com> (raw)

We use ioat ring space for determining if ioat callbacks can enqueue a
packet to ioat device. But there is one slot can't be used in ioat
ring due to the ioat driver design, so we need to reduce one slot in
ioat ring to prevent ring size mismatch in ioat callbacks.

Fixes: 2aa47e94bfb2 ("examples/vhost: add ioat ring space count and check")
Cc: stable@dpdk.org

Signed-off-by: Cheng Jiang <Cheng1.jiang@intel.com>
---
 examples/vhost/ioat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/vhost/ioat.c b/examples/vhost/ioat.c
index 60b73be93..9cb5e0d50 100644
--- a/examples/vhost/ioat.c
+++ b/examples/vhost/ioat.c
@@ -113,7 +113,7 @@ open_ioat(const char *value)
 			goto out;
 		}
 		rte_rawdev_start(dev_id);
-		cb_tracker[dev_id].ioat_space = IOAT_RING_SIZE;
+		cb_tracker[dev_id].ioat_space = IOAT_RING_SIZE - 1;
 		dma_info->nr++;
 		i++;
 	}
-- 
2.29.2


             reply	other threads:[~2021-03-17  5:57 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-17  5:40 Cheng Jiang [this message]
2021-03-17  6:58 ` Hu, Jiayu
2021-04-07  7:47 ` Maxime Coquelin
2021-04-07  7:54   ` Hu, Jiayu
2021-04-13  8:50     ` Maxime Coquelin
2021-04-13  9:55       ` Jiang, Cheng1
2021-04-28  2:09 ` Xia, Chenbo

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