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Eric Dumazet 5933dd2f02 net: NET_SKB_PAD should depend on L1_CACHE_BYTES 
In old kernels, NET_SKB_PAD was defined to 16.

Then commit d6301d3dd1 (net: Increase default NET_SKB_PAD to 32), and
commit 18e8c134f4 (net: Increase NET_SKB_PAD to 64 bytes) increased it
to 64.

While first patch was governed by network stack needs, second was more
driven by performance issues on current hardware. Real intent was to
align data on a cache line boundary.

So use max(32, L1_CACHE_BYTES) instead of 64, to be more generic.

Remove microblaze and powerpc own NET_SKB_PAD definitions.

Thanks to Alexander Duyck and David Miller for their comments.

Suggested-by: David Miller <davem@davemloft.net>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-15 18:16:43 -07:00
..
alpha asm-generic: remove ARCH_HAS_SG_CHAIN in scatterlist.h 2010-05-27 09:12:54 -07:00
arm Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 2010-05-30 09:13:08 -07:00
avr32 avr32: use asm-generic/scatterlist.h 2010-05-27 09:12:54 -07:00
blackfin blackfin: use use asm-generic/scatterlist.h 2010-05-27 09:12:55 -07:00
cris cris: use asm-generic/scatterlist.h 2010-05-27 09:12:55 -07:00
frv FRV: ARCH_KMALLOC_MINALIGN was already defined 2010-05-28 10:17:21 -07:00
h8300 h8300: use asm-generic/scatterlist.h 2010-05-27 09:12:55 -07:00
ia64 ia64: revert __node_random addition 2010-05-30 10:08:03 -07:00
m32r m32r: use use asm-generic/scatterlist.h 2010-05-27 09:12:55 -07:00
m68k Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k 2010-05-27 10:19:19 -07:00
m68knommu arch/m68knommu/platform/68360/commproc.c: Checkpatch cleanup 2010-05-24 14:44:25 +10:00
microblaze net: NET_SKB_PAD should depend on L1_CACHE_BYTES 2010-06-15 18:16:43 -07:00
mips mips: use use asm-generic/scatterlist.h 2010-05-27 09:12:55 -07:00
mn10300 mn10300: use asm-generic/scatterlist.h 2010-05-27 09:12:55 -07:00
parisc Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6 2010-05-30 09:02:02 -07:00
powerpc net: NET_SKB_PAD should depend on L1_CACHE_BYTES 2010-06-15 18:16:43 -07:00
s390 Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6 2010-05-27 10:48:46 -07:00
score asm-generic: remove ISA_DMA_THRESHOLD in scatterlist.h 2010-05-27 09:12:54 -07:00
sh asm-generic: add NEED_SG_DMA_LENGTH to define sg_dma_len() 2010-05-27 09:12:54 -07:00
sparc Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-05-27 15:23:47 -07:00
um Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
x86 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 2010-05-30 09:13:08 -07:00
xtensa xtensa: use use asm-generic/scatterlist.h 2010-05-27 09:12:55 -07:00
.gitignore
Kconfig hw-breakpoints: Separate constraint space for data and instruction breakpoints 2010-05-01 04:32:11 +02:00