linux-kernel - Re: [PATCH v4 6/8] x86: bump ZO_z_extra

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Message-ID: <20200402155810.GD9352@zn.tnic>
Date:   Thu, 2 Apr 2020 17:58:10 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Nick Terrell <terrelln@...com>
Cc:     Nick Terrell <nickrterrell@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Chris Mason <clm@...com>,
        "linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Petr Malat <oss@...at.biz>, Kees Cook <keescook@...omium.org>,
        Kernel Team <Kernel-team@...com>,
        Adam Borowski <kilobyte@...band.pl>,
        Patrick Williams <patrickw3@...com>,
        Michael van der Westhuizen <rmikey@...com>,
        "mingo@...nel.org" <mingo@...nel.org>,
        Patrick Williams <patrick@...cx.xyz>,
        Sedat Dilek <sedat.dilek@...il.com>
Subject: Re: [PATCH v4 6/8] x86: bump ZO_z_extra_bytes margin for zstd

On Wed, Apr 01, 2020 at 05:33:03PM +0000, Nick Terrell wrote:
> The code is currently written so that all the compression algorithms use the
> same ZO_z_extra_bytes. It is taken to be the maximum of the growth rate
> plus the maximum fixed overhead. Just a few lines above is the comment:
> 
> # … Hence safety
> # margin should be updated to cover all decompressors so that we don't
> # need to deal with each of them separately. Please check
> # the description in lib/decompressor_xxx.c for specific information.
> 
> So I was been following the guidance in the comments.

Please state that in the commit message when you send your next
revision.

> Does it matter? I’m not an expert here,

Huh, you're only sending the code then? Or what do you mean with not
being an expert?

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette