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Subject: Re: [RESEND PATCH v2 0/2] Add support for ZSTD-compressed kernel
From:   =?iso-8859-1?Q?Ren=E9_Rebe?= <rene@exactcode.com>
In-Reply-To: <20180322123557.4eu4huhldqn6bid6@angband.pl>
Date:   Mon, 23 Apr 2018 23:17:13 +0200
Cc:     Nick Terrell <terrelln@fb.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org,
        x86@kernel.org, kernel-team@fb.com, Chris Mason <clm@fb.com>,
        Julian Andres Klode <julian.klode@canonical.com>,
        Andi Kleen <ak@linux.intel.com>
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Message-Id: <B871331D-D4B9-4D65-9E47-F27366E9258F@exactcode.com>
References: <20180322012943.4145794-1-terrelln@fb.com> <C0384AAE-FF89-4BAA-8EFC-FB3B0A8F02AB@exactcode.com> <20180322123557.4eu4huhldqn6bid6@angband.pl>
To:     Adam Borowski <kilobyte@angband.pl>
Sender: linux-kernel-owner@vger.kernel.org
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Hi,

On 22 Mar 2018, at 13:35, Adam Borowski <kilobyte@angband.pl> wrote:

> On Thu, Mar 22, 2018 at 12:09:45PM +0100, Ren=E9 Rebe wrote:
>> Should this currently just work without any arch change on e.g.
>> ppc64, sparc64 et al.? I could do a test build and boot if that is
>> of any value, ...
>=20
> Initrd: no reason it wouldn't work, although for anything related to =
the
> boot process testing is a very good idea.  If you test, you'd really =
want to
> apply that printk patch I posted, it's too easy to accidentally get a =
silent
> fallback to gzip or uncompressed.  I wonder, perhaps such a printk =
could be
> permanently added, at a low message priority?

zstd initrd worked on sparc64/sun4u - Ultra 30:

	https://www.youtube.com/watch?v=3D10q2OxHAzQ4

Any chance we could get this initrd zstd support upstream?

> Kernel itself: needs per-arch porting, but it's not advertised in =
kconfig
> outside x86 so that's not a problem. =20
>=20
> If you are knowledgeful about bootloaders on ppc64, sparc64, etc, such
> information would be great.


--=20
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