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| author | Eric Dumazet <edumazet@google.com> | 2018-03-31 12:58:57 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-31 23:25:39 -0400 |
| commit | c2615cf5a761b32bf74e85bddc223dfff3d9b9f0 (patch) | |
| tree | 0bb32d58aa3e1d251d1b8d25aebc25317ba5eaa5 /include/net | |
| parent | e5d672a0780d9e7118caad4c171ec88b8299398d (diff) | |
| download | linux-c2615cf5a761b32bf74e85bddc223dfff3d9b9f0.tar.gz linux-c2615cf5a761b32bf74e85bddc223dfff3d9b9f0.tar.bz2 linux-c2615cf5a761b32bf74e85bddc223dfff3d9b9f0.zip | |
inet: frags: reorganize struct netns_frags
Put the read-mostly fields in a separate cache line
at the beginning of struct netns_frags, to reduce
false sharing noticed in inet_frag_kill()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/inet_frag.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h index a52e7273e7a5..ed07e3786d98 100644 --- a/include/net/inet_frag.h +++ b/include/net/inet_frag.h @@ -5,16 +5,17 @@ #include <linux/rhashtable.h> struct netns_frags { - struct rhashtable rhashtable ____cacheline_aligned_in_smp; - - /* Keep atomic mem on separate cachelines in structs that include it */ - atomic_long_t mem ____cacheline_aligned_in_smp; /* sysctls */ long high_thresh; long low_thresh; int timeout; int max_dist; struct inet_frags *f; + + struct rhashtable rhashtable ____cacheline_aligned_in_smp; + + /* Keep atomic mem on separate cachelines in structs that include it */ + atomic_long_t mem ____cacheline_aligned_in_smp; }; /** |