On Wed, 2013-05-15 at 09:56 +0100, David Laight wrote: > > > If the 'fix' is to relocate the skb you are doomed to lose regardless > > > of the check - unless you are willing to reallocate a lot of times, > > > and without freeing the old skb. > > > I'd assumed the 'fix' was to disable the relevant offload. > > > > We relocate once and then drop the packet if we encounter additional > > errors, including OOM, DMA mapping error, 4G boundary, etc. The new > > linear skb should not hit the 4G boundary again. The room between the > > end of this current buffer and 4G isn't big enough for the new linear > > skb. > > The first skb might be just below the 4G boundary and the > second just below the 8G one. > We will discard the packet if that happens. I think the probabilty is very small. -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html