netdev - RE: [PATCH] net/hyperv: fix erroneous NETDEV_TX

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Date:	Wed, 14 Mar 2012 20:29:13 +0000
From:	Haiyang Zhang <haiyangz@...rosoft.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Ben Greear <greearb@...delatech.com>,
	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	KY Srinivasan <kys@...rosoft.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: RE: [PATCH] net/hyperv: fix erroneous NETDEV_TX_BUSY use



> -----Original Message-----
> From: Eric Dumazet [mailto:eric.dumazet@...il.com]
> Sent: Wednesday, March 14, 2012 4:15 PM
> To: Haiyang Zhang
> Cc: Ben Greear; David Miller; netdev; KY Srinivasan; Greg Kroah-Hartman
> Subject: RE: [PATCH] net/hyperv: fix erroneous NETDEV_TX_BUSY use
> 
> On Wed, 2012-03-14 at 20:00 +0000, Haiyang Zhang wrote:
> 
> > Actually, I'm working on this bug, and have a patch under our internal
> > review now. My fix is actually not freeing the SKB, and return
> NETDEV_TX_BUSY.
> >
> > Even if the vmbus ring buffer is busy currently, it can be available
> during
> > the next re-try, because the host is taking away data from ring buffer.
> The
> > stop/wake queue mechanism is in the netvsc.c file.
> >
> > In the out-of-memory case, dropping packet and return NETDEV_TX_OK seems
> fine.
> 
> That will be fine for net-next.
> 
> I sent a patch for current kernels, where obvious and minimal fixes
> apply.

Sounds good. Thanks.

Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>