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| author | Eric Dumazet | 2018-03-07 17:43:19 +0100 |
|---|---|---|
| committer | David S. Miller | 2018-03-08 00:13:41 +0100 |
| commit | a366e300ae9fc466d333e6d8f2bc5d58ed248041 (patch) | |
| tree | 689aef7cbe9b1df29666ab6a67439a81f2edc7ab /samples/bpf/trace_event_user.c | |
| parent | Merge branch 'RDS-zerocopy-code-enhancements' (diff) | |
| download | kernel-qcow2-linux-a366e300ae9fc466d333e6d8f2bc5d58ed248041.tar.gz kernel-qcow2-linux-a366e300ae9fc466d333e6d8f2bc5d58ed248041.tar.xz kernel-qcow2-linux-a366e300ae9fc466d333e6d8f2bc5d58ed248041.zip | |
ip6mr: remove synchronize_rcu() in favor of SOCK_RCU_FREE
Kirill found that recently added synchronize_rcu() call in
ip6mr_sk_done()
was slowing down netns dismantle and posted a patch to use it only if
the socket
was found.
I instead suggested to get rid of this call, and use instead
SOCK_RCU_FREE
We might later change IPv4 side to use the same technique and unify
both stacks. IPv4 does not use synchronize_rcu() but has a call_rcu()
that could be replaced by SOCK_RCU_FREE.
Tested:
time for i in {1..1000}; do unshare -n /bin/false;done
Before : real 7m18.911s
After : real 10.187s
Fixes: 8571ab479a6e ("ip6mr: Make mroute_sk rcu-based")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Yuval Mintz <yuvalm@mellanox.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/trace_event_user.c')
0 files changed, 0 insertions, 0 deletions