On Fri, Nov 22, 2013 at 06:28:29PM +0100, LEROY Christophe wrote: > On PPC_8xx, CRC32_SLICEBY4 is more efficient (almost twice) than > CRC32_SLICEBY8, > as shown below: > > With CRC32_SLICEBY8: > [ 1.109204] crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64 > [ 1.114401] crc32: self tests passed, processed 225944 bytes in 15118910 > nsec > [ 1.130655] crc32c: CRC_LE_BITS = 64 > [ 1.134235] crc32c: self tests passed, processed 225944 bytes in 4479879 > nsec > > With CRC32_SLICEBY4: > [ 1.097129] crc32: CRC_LE_BITS = 32, CRC_BE BITS = 32 > [ 1.101878] crc32: self tests passed, processed 225944 bytes in 8616242 > nsec > [ 1.116298] crc32c: CRC_LE_BITS = 32 > [ 1.119607] crc32c: self tests passed, processed 225944 bytes in 3289576 > nsec > > Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr> > > > diff -ur a/arch/powerpc/configs/adder875_defconfig > b/arch/powerpc/configs.new/adder875_defconfig > --- a/arch/powerpc/configs/adder875_defconfig 2013-11-22 18:20:10.342968268 > +0100 > +++ b/arch/powerpc/configs.new/adder875_defconfig 2013-11-22 > 18:17:46.499686457 +0100 > @@ -70,3 +70,4 @@ > CONFIG_DETECT_HUNG_TASK=y > CONFIG_DEBUG_INFO=y > # CONFIG_RCU_CPU_STALL_DETECTOR is not set > +CONFIG_CRC32_SLICEBY4=y
When applying I got this: error: arch/powerpc/configs.new/adder875_defconfig: does not exist in index error: arch/powerpc/configs.new/ep88xc_defconfig: does not exist in index error: arch/powerpc/configs.new/mpc866_ads_defconfig: does not exist in index error: arch/powerpc/configs.new/mpc885_ads_defconfig: does not exist in index error: arch/powerpc/configs.new/tqm8xx_defconfig: does not exist in index I've fixed it, but please ensure that patches can be applied using "git am". I recommend using git to generate patches, but if you don't want to do so be sure that it's the "b" filename, not the "a" filename, that matches the tree. -Scott -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
