On Wed, 2016-12-07 at 11:00 -0800, Eric Dumazet wrote: > > So far, I believe net/unix/af_unix.c uses PAGE_ALLOC_COSTLY_ORDER as > max_order, but UDP does not do that yet.
For af_unix, it happened in https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=28d6427109d13b0f447cba5761f88d3548e83605 This came to fix a regression, since we had a gigantic slab allocation in af_unix before https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=eb6a24816b247c0be6b2e97e68933072874bbe54
