[PATCH 1/1] net/hyperv: Fix the code handling tx busy
Eric Dumazet
eric.dumazet at gmail.com
Mon Mar 19 18:30:58 UTC 2012
On Mon, 2012-03-19 at 17:50 +0000, Haiyang Zhang wrote:
> As in my previous reply to Eric --
> We actually stop queue when the ring buffer is busy, see the code in netvsc.c
>
> I have tested with one CPU. After NETDEV_TX_BUSY is returned, the Linux guest OS
> continues to respond without any problem.
Then something is wrong somewhere.
Dont hide a bug adding a trick.
If you ever return NETDEV_TX_BUSY from start_xmit(), then you MUST call
netif_tx_stop_queue() as well right before.
I believe I already told this before...
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