On 13/01/17 18:55, Remanan Pillai wrote: > From: Vineeth Remanan Pillai <vinee...@amazon.com> > > 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 <vinee...@amazon.com>
Reviewed-by: Juergen Gross <jgr...@suse.com> Thanks, Juergen
