19 Dec, 2013

1 commit

• 237217546   lib: hash: follow-up fixups for arch hash ... Browse Code »

  13

  This patch adds the include file to pull in __read_mostly on some
  architectures e.g. ppc and also fixes up signatures in generic
  asm.

  Reported-by: Fengguang Wu
  Signed-off-by: Francesco Fusco
  Signed-off-by: David S. Miller

  Francesco Fusco

  2013-12-19 13:14:53 +0800  

18 Dec, 2013

1 commit

• 71ae8aac3   lib: introduce arch optimized hash library ... Browse Code »

  13

  We introduce a new hashing library that is meant to be used in
  the contexts where speed is more important than uniformity of the
  hashed values. The hash library leverages architecture specific
  implementation to achieve high performance and fall backs to
  jhash() for the generic case.

  On Intel-based x86 architectures, the library can exploit the crc32l
  instruction, part of the Intel SSE4.2 instruction set, if the
  instruction is supported by the processor. This implementation
  is twice as fast as the jhash() implementation on an i7 processor.

  Additional architectures, such as Arm64 provide instructions for
  accelerating the computation of CRC, so they could be added as well
  in follow-up work.

  Signed-off-by: Francesco Fusco
  Signed-off-by: Daniel Borkmann
  Signed-off-by: Thomas Graf
  Cc: linux-kernel@vger.kernel.org
  Signed-off-by: David S. Miller

  Francesco Fusco

  2013-12-18 03:27:17 +0800