From: Alexander Duyck <alexander.du...@gmail.com> Date: Fri, 15 Feb 2019 14:44:05 -0800
> This patch set addresses a couple of issues that I had pointed out to Jann > Horn in response to a recent patch submission. > > The first issue is that I wanted to avoid the need to read/modify/write the > size value in order to generate the value for pagecnt_bias. Instead we can > just use a fixed constant which reduces the need for memory read operations > and the overall number of instructions to update the pagecnt bias values. > > The other, and more important issue is, that apparently we were letting tun > access the napi_alloc_cache indirectly through netdev_alloc_frag and as a > result letting it create unaligned accesses via unaligned allocations. In > order to prevent this I have added a call to SKB_DATA_ALIGN for the fragsz > field so that we will keep the offset in the napi_alloc_cache > SMP_CACHE_BYTES aligned. Series applied, thanks Alexander.
