linux-kernel - Re: [PATCH 2/4] crypto: qat

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZPcqALQ0Ck/3lF0U@gcabiddu-mobl1.ger.corp.intel.com>
Date:   Tue, 5 Sep 2023 14:15:44 +0100
From:   Giovanni Cabiddu <giovanni.cabiddu@...el.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
CC:     Linus Torvalds <torvalds@...ux-foundation.org>, <ardb@...nel.org>,
        <kees@...nel.org>, <linux-kernel@...r.kernel.org>,
        <enlin.mu@...soc.com>, <ebiggers@...gle.com>,
        <gpiccoli@...lia.com>, <willy@...radead.org>,
        <yunlong.xing@...soc.com>, <yuxiaozhang@...gle.com>,
        <qat-linux@...el.com>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Yang Shen <shenyang39@...wei.com>,
        Zhou Wang <wangzhou1@...ilicon.com>,
        Weigang Li <weigang.li@...el.com>, Chris Mason <clm@...a.com>,
        Brian Will <brian.will@...el.com>,
        <linux-btrfs@...r.kernel.org>
Subject: Re: [PATCH 2/4] crypto: qat - Remove zlib-deflate

Hi Herbert,

On Wed, Aug 30, 2023 at 06:08:47PM +0800, Herbert Xu wrote:
> Remove the implementation of zlib-deflate because it is completely
> unused in the kernel.
We are working at a new revision of [1] which enables BTRFS to use acomp
for offloading zlib-deflate. We see that there is value in using QAT for
such use case in terms of throughput / CPU utilization / compression ratio
compared to software.
Zlib-deflate is preferred to deflate since BTRFS already uses that
format.

We expect to send this patch for 6.7.
Can we keep zlib-deflate in the kernel?

Thanks,

[1] https://patchwork.kernel.org/project/linux-btrfs/patch/1467083180-111750-1-git-send-email-weigang.li@intel.com/

-- 
Giovanni