linux-kernel - Re: [PATCH v4 0/6] x86 CRC optimizations

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Message-ID: <20250210180117.GF1264@sol.localdomain>
Date: Mon, 10 Feb 2025 10:01:17 -0800
From: Eric Biggers <ebiggers@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: linux-crypto@...r.kernel.org, x86@...nel.org,
	linux-block@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>,
	Keith Busch <kbusch@...nel.org>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	"Martin K . Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH v4 0/6] x86 CRC optimizations

On Mon, Feb 10, 2025 at 09:45:34AM -0800, Eric Biggers wrote:
> This patchset applies to the crc tree and is also available at:
> 
>     git fetch https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git crc-x86-v4
> 
> This series replaces the existing x86 PCLMULQDQ optimized CRC code with
> new code that is shared among the different CRC variants and also adds
> VPCLMULQDQ support, greatly improving performance on recent CPUs.  The
> last patch wires up the same optimization to crc64_be() and crc64_nvme()
> (a.k.a. the old "crc64_rocksoft") which previously were unoptimized,
> improving the performance of those CRC functions by as much as 100x.
> crc64_be is used by bcachefs, and crc64_nvme is used by blk-integrity.
> 

FYI, I've applied this to crc-next.

- Eric