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author | Eric Dumazet <dada1@cosmosbay.com> | 2008-11-16 22:40:17 -0500 |
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committer | David S. Miller <davem@davemloft.net> | 2008-11-16 22:40:17 -0500 |
commit | 3ab5aee7fe840b5b1b35a8d1ac11c3de5281e611 (patch) | |
tree | 468296b7be813643248d4ca67497d6ddb6934fc6 /Documentation/RCU | |
parent | 88ab1932eac721c6e7336708558fa5ed02c85c80 (diff) |
net: Convert TCP & DCCP hash tables to use RCU / hlist_nulls
RCU was added to UDP lookups, using a fast infrastructure :
- sockets kmem_cache use SLAB_DESTROY_BY_RCU and dont pay the
price of call_rcu() at freeing time.
- hlist_nulls permits to use few memory barriers.
This patch uses same infrastructure for TCP/DCCP established
and timewait sockets.
Thanks to SLAB_DESTROY_BY_RCU, no slowdown for applications
using short lived TCP connections. A followup patch, converting
rwlocks to spinlocks will even speedup this case.
__inet_lookup_established() is pretty fast now we dont have to
dirty a contended cache line (read_lock/read_unlock)
Only established and timewait hashtable are converted to RCU
(bind table and listen table are still using traditional locking)
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/RCU')
0 files changed, 0 insertions, 0 deletions