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author | Eric Dumazet <dada1@cosmosbay.com> | 2008-01-18 03:33:26 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2008-01-28 15:02:46 -0800 |
commit | a6501e080c318f8d4467679d17807f42b3a33cd5 (patch) | |
tree | 02ba4422ec6603b2bfddace52b2fabaaa6725496 /net/decnet | |
parent | b59cfbf77dc8368c2c90b012c79553613f4d70c3 (diff) | |
download | kernel_samsung_tuna-a6501e080c318f8d4467679d17807f42b3a33cd5.zip kernel_samsung_tuna-a6501e080c318f8d4467679d17807f42b3a33cd5.tar.gz kernel_samsung_tuna-a6501e080c318f8d4467679d17807f42b3a33cd5.tar.bz2 |
[IPV4] FIB_HASH: Reduce memory needs and speedup lookups
Currently, sizeof(struct fib_alias) is 24 or 48 bytes on 32/64 bits
arches.
Because of SLAB_HWCACHE_ALIGN requirement, these are rounded to 32 and
64 bytes respectively.
This patch moves rcu to the end of fib_alias, and conditionally
defines it only for CONFIG_IP_FIB_TRIE.
We also remove SLAB_HWCACHE_ALIGN requirement for fib_alias and
fib_node objects because it is not necessary.
(BTW SLUB currently denies it for objects smaller than
cache_line_size() / 2, but not SLAB)
Finally, sizeof(fib_alias) go back to 16 and 32 bytes.
Then, we can embed one fib_alias on each fib_node, to favor locality.
Most of the time access to the fib_alias will be free because one
cache line contains both the list head (fn_alias) and (one of) the
list element.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/decnet')
0 files changed, 0 insertions, 0 deletions