Eric Dumazet 230140cffa [INET]: Remove per bucket rwlock in tcp/dccp ehash table. ... As done two years ago on IP route cache table (commit 22c047ccbc) , we can avoid using one lock per hash bucket for the huge TCP/DCCP hash tables. On a typical x86_64 platform, this saves about 2MB or 4MB of ram, for litle performance differences. (we hit a different cache line for the rwlock, but then the bucket cache line have a better sharing factor among cpus, since we dirty it less often). For netstat or ss commands that want a full scan of hash table, we perform fewer memory accesses. Using a 'small' table of hashed rwlocks should be more than enough to provide correct SMP concurrency between different buckets, without using too much memory. Sizing of this table depends on num_possible_cpus() and various CONFIG settings. This patch provides some locking abstraction that may ease a future work using a different model for TCP/DCCP table. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2007-11-07 04:15:11 -08:00
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ccids	[CCID2/3]: Initialisation assignments of 0 are redundant	2007-10-24 10:53:01 -02:00
Kconfig	…
Makefile	…
ackvec.c	…
ackvec.h	…
ccid.c	…
ccid.h	…
dccp.h	…
diag.c	…
feat.c	…
feat.h	…
input.c	[DCCP]: Convert Reset code into socket error number	2007-10-24 10:27:48 -02:00
ipv4.c	[DCCP]: Use DEFINE_PROTO_INUSE infrastructure.	2007-11-07 04:09:01 -08:00
ipv6.c	[DCCP]: Use DEFINE_PROTO_INUSE infrastructure.	2007-11-07 04:09:01 -08:00
ipv6.h	…
minisocks.c	…
options.c	[DCCP]: Unaligned pointer access	2007-10-24 10:46:58 -02:00
output.c	…
probe.c	…
proto.c	[INET]: Remove per bucket rwlock in tcp/dccp ehash table.	2007-11-07 04:15:11 -08:00
sysctl.c	…
timer.c	…