From: Daniel Borkmann <dan...@iogearbox.net> Date: Mon, 07 Sep 2015 16:54:46 +0200
> On 08/17/2015 11:02 PM, David Miller wrote: > ... >> I would seriously rather see us do an expensive full copy of the SKB >> than to have traffic which is unexpectedly invisible to taps. > > I've been looking into this issue a bit further, so the copy for the > tap seems doable, but while further going through the code to find > similar > issues elsewhere, and doing some experiments, it looks like we write > shared info also in some edge-cases of upcalls such as nfqueue or ovs > when mmaped netlink is used for rx. I did a test with nfqueue using > the libmnl mmap branch [1]. Honestly if it's something isolated to something like nf_queue it can be contained to just being a special fix there. nf_queue is usually very special and needs hacks to handle things properly since it acts as an "escape" point for various SKB things. But if it's in OVS too.... I guess we need a more generic fix. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
