Re: [PATCH for-2.6.35] virtio_net: fix oom handling on tx

From: Rusty Russell
Date: Tue Jun 15 2010 - 00:23:38 EST

On Fri, 11 Jun 2010 04:33:43 am Michael S. Tsirkin wrote:
> On Thu, Jun 10, 2010 at 10:46:53AM -0700, Stephen Hemminger wrote:
> > It makes more sense to have the device increment tx_droppped,
> > and return NETDEV_TX_OK. Skip the message (or make it a pr_debug()).
> > Network devices do not guarantee packet delivery, and if out of
> > resources then holding more data in the
> > queue is going to hurt not help the situation.

Yes, actually oom should be a ratelimited message and TX_OK, the other
case is a "should never happen" logic bug which warrants an error and
I don't care what it returns (whatever's easiest).

Please fix both at once since you're touching it.

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