linux-kernel - Re: [RESEND PATCH v2 0/2] Add support for ZSTD-compressed kernel

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Message-ID: <20190607230608.GA21020@angband.pl>
Date:   Sat, 8 Jun 2019 01:06:08 +0200
From:   Adam Borowski <kilobyte@...band.pl>
To:     Nick Terrell <terrelln@...com>
Cc:     René Rebe <rene@...ctcode.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        Kernel Team <Kernel-team@...com>, Chris Mason <clm@...com>,
        Julian Andres Klode <julian.klode@...onical.com>
Subject: Re: [RESEND PATCH v2 0/2] Add support for ZSTD-compressed kernel

On Fri, Jun 07, 2019 at 07:20:46PM +0000, Nick Terrell wrote:
> We'd love to get this mainlined as well!
> 
> We're using these patches internally as well. We're seeing an improvement on an
> Intel Atom N3710, where boot time is reduced by one second over using an xz
> compressed kernel. It looks like Ubuntu just switched to a lz4 compressed kernel,
> but zstd is likely a better trade off, because it compresses much better and still has
> excellent decompression speed.
> 
> Since its been nearly a year since I sent these out, I will take some time to rebase
> and retest the patches in case anything changed, and then then resend the patches
> in the next weeks.

Hi!
After the ping, I intended to resend the patch-set (with removals included)
after I return from miniDebconf Hamburg, but you 1. are the author of the
non-trivial part, 2. you have a better test machinery, and 3. I have a
deeply seated preference for effort to be done by people who are not me.

A rebased and working version is at https://github.com/kilobyte/linux/tree/nobz2-v3
but there are no real improvements beyond rebases, a typo fix, and Paul Burton's
ACK for mips.

There's an unaddressed comment by Ingo Molnar
https://lore.kernel.org/lkml/20181112042200.GA96061@gmail.com/
for your part of the code.

So what do you suggest?


Meow!
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