Re: [PATCH v2] xen-netfront: Fix Rx stall during network stress and OOM

[Vineeth Remanan Pillai]

On 01/19/2017 09:11 AM, David Miller wrote:
> From: Vineeth Remanan Pillai <vineethp@xxxxxxxxxx>
> Date: Thu, 19 Jan 2017 08:35:39 -0800
>
> > From: Vineeth Remanan Pillai <vineethp@xxxxxxxxxx>
> >
> > During an OOM scenario, request slots could not be created as skb
> > allocation fails. So the netback cannot pass in packets and netfront
> > wrongly assumes that there is no more work to be done and it disables
> > polling. This causes Rx to stall.
> >
> > The issue is with the retry logic which schedules the timer if the
> > created slots are less than NET_RX_SLOTS_MIN. The count of new request
> > slots to be pushed are calculated as a difference between new req_prod
> > and rsp_cons which could be more than the actual slots, if there are
> > unconsumed responses.
> >
> > The fix is to calculate the count of newly created slots as the
> > difference between new req_prod and old req_prod.
> >
> > Signed-off-by: Vineeth Remanan Pillai <vineethp@xxxxxxxxxx>
> > Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
> > ---
> > Changes in v2:
> > 	- Removed the old implementation of enabling polling on
> > 	  skb allocation error.
> > 	- Corrected the refill timer logic to schedule when newly
> > 	  created slots since last push is less than NET_RX_SLOTS_MIN.
> Your postings aren't showing up on vger.kernel.org at all.
>
> Are you getting a bounce message back?  I can only assume you are triggering
> one of the various content filters we have.
I haven't received any bounce messages till now. The mail showed up
in xen-devel after about 8 hours yesterday. Not sure what is happening
with vger.kernel.org. My initial patch showed up in all the mailing 
list. The
only difference is, I switched to a machine running a later version of git.

Should I try sending it once again?

Thanks