| commit | 21371f768bf7127ee45bfaadd17899df6a439e8f | |
| author | Eric Dumazet <dada1@cosmosbay.com> | |
| Tue, 25 Dec 2007 04:57:56 +0000 (24 20:57 -0800) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Mon, 28 Jan 2008 23:00:05 +0000 (28 15:00 -0800) | ||
| tree | 91b5debf1d861a40c942a33f1286b70031a94305 | treesnapshot (tar.gz zip) |
| parent | b15c4bcd15741b31019379298edfca28dc78029d | commitdiff |
[SOCK] Avoid divides in sk_stream_pages() and __sk_stream_mem_reclaim()
sk_forward_alloc being signed, we should take care of divides by
SK_STREAM_MEM_QUANTUM we do in sk_stream_pages() and
__sk_stream_mem_reclaim()
This patchs introduces SK_STREAM_MEM_QUANTUM_SHIFT, defined
as ilog2(SK_STREAM_MEM_QUANTUM), to be able to use right
shifts instead of plain divides.
This should help compiler to choose right shifts instead of
expensive divides (as seen with CONFIG_CC_OPTIMIZE_FOR_SIZE=y on x86)
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
sk_forward_alloc being signed, we should take care of divides by
SK_STREAM_MEM_QUANTUM we do in sk_stream_pages() and
__sk_stream_mem_reclaim()
This patchs introduces SK_STREAM_MEM_QUANTUM_SHIFT, defined
as ilog2(SK_STREAM_MEM_QUANTUM), to be able to use right
shifts instead of plain divides.
This should help compiler to choose right shifts instead of
expensive divides (as seen with CONFIG_CC_OPTIMIZE_FOR_SIZE=y on x86)
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| include/net/sock.h | diffblobblamehistory | |
| net/core/stream.c | diffblobblamehistory |