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| author | Eric Dumazet <edumazet@google.com> | 2013-05-20 06:52:26 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-01-01 01:27:52 +0000 |
| commit | 10f2216850e5955d102f8a052f5f3621e1aca328 (patch) | |
| tree | f5090a93797118448f919eebc1cc5e30d9bb3891 /include/net/sch_generic.h | |
| parent | 0aba46add2915b344580569e87d9c41274b9c475 (diff) | |
| download | kernel_samsung_smdk4412-10f2216850e5955d102f8a052f5f3621e1aca328.zip kernel_samsung_smdk4412-10f2216850e5955d102f8a052f5f3621e1aca328.tar.gz kernel_samsung_smdk4412-10f2216850e5955d102f8a052f5f3621e1aca328.tar.bz2 | |
tcp: md5: remove spinlock usage in fast path
commit 71cea17ed39fdf1c0634f530ddc6a2c2fc601c2b upstream.
TCP md5 code uses per cpu variables but protects access to them with
a shared spinlock, which is a contention point.
[ tcp_md5sig_pool_lock is locked twice per incoming packet ]
Makes things much simpler, by allocating crypto structures once, first
time a socket needs md5 keys, and not deallocating them as they are
really small.
Next step would be to allow crypto allocations being done in a NUMA
aware way.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2:
- Adjust context
- Conditions for alloc/free are quite different]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/net/sch_generic.h')
0 files changed, 0 insertions, 0 deletions