Here is an updated version of the flow cache removal set. Changes since last iteration: - rebase - split removal into multiple gradual chunks to ease review - add a small pcpu xdst cache to reduce alloc/free overhead when subsequent packet can re-use previous xdst
I did some sanity testing and ran a few netperf tests. The most severe hit is with pure UDP_RR workload. TCP_STREAM is ok-ish, UDP_STREAM is marginally faster with the simpler pcpu cache (we only instantiate one xfrm_dst and then reuse it). We can discuss fine print and possible further work (avoid this_cpu_xchg, xfrm_genid removal, etc) at NFWS if needed. Thanks, Florian Documentation/networking/ip-sysctl.txt | 6 /include/net/flow.h | 34 -- /include/net/netns/xfrm.h | 11 /include/net/xfrm.h | 9 /net/core/Makefile | 1 /net/ipv4/ip_vti.c | 31 - /net/ipv4/xfrm4_policy.c | 11 /net/ipv6/ip6_vti.c | 31 - /net/ipv6/xfrm6_policy.c | 11 /net/key/af_key.c | 4 /net/xfrm/xfrm_device.c | 3 /net/xfrm/xfrm_policy.c | 334 ++++---------------- /net/xfrm/xfrm_user.c | 2 /security/selinux/include/xfrm.h | 4 include/net/flowcache.h | 25 - net/core/flow.c | 516 ------------------------------- 16 files changed, 82 insertions(+), 951 deletions(-)
