[PATCH for v4.9 LTS 36/86] xen-netfront: Fix Rx stall during network stress and OOM

From: Vineeth Remanan Pillai [ Upstream commit 90c311b0eeead647b708a723dbdde1eda3dcad05 ] 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

[PATCH for v4.9 LTS 36/86] xen-netfront: Fix Rx stall during network stress and OOM

From: Vineeth Remanan Pillai [ Upstream commit 90c311b0eeead647b708a723dbdde1eda3dcad05 ] 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