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

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Message-ID: <B8FF2955-1503-41F6-AD4A-C1B902551194@fb.com>
Date:   Mon, 10 Jun 2019 18:40:51 +0000
From:   Nick Terrell <terrelln@...com>
To:     Adam Borowski <kilobyte@...band.pl>
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 Jun 7, 2019, at 4:06 PM, Adam Borowski <kilobyte@...band.pl> wrote:
> 
> 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.

If its okay with you I will resend the patch set with your removals included by the end
of next week at the latest. I'll aim for this week.

-Nick

> 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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