linux-kernel - Re: [RFC PATCH v2] jffs2: add support for zstd compression

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Message-ID: <ee050b2dce3a233318748df416be0ebff4402ed2.camel@infradead.org>
Date:   Mon, 26 Apr 2021 09:24:03 +0100
From:   David Woodhouse <dwmw2@...radead.org>
To:     Rui Salvaterra <rsalvaterra@...il.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     lizhe67@...wei.com, christian.brauner@...ntu.com,
        gustavoars@...nel.org, trix@...hat.com, keescook@...omium.org
Subject: Re: [RFC PATCH v2] jffs2: add support for zstd compression

On Thu, 2021-03-25 at 14:47 +0000, Rui Salvaterra wrote:
> Friendly ping (and also cc'ing dwmw2).
> 
> On Tue, 16 Mar 2021 at 14:19, Rui Salvaterra <rsalvaterra@...il.com> wrote:
> > 
> > Implement support for zstd compression in jffs2 at the default compression
> > level (3).
> > 
> > Lightly tested in OpenWrt, on a single CPU embedded MIPS32 system (AirGrid M2).

Seems reasonable. Do you have the corresponding addition for mkfs.jffs2
and can you report the boot time / image sizes with it vs. zlib on a
typical platform?

And if it doesn't make a difference to boot time or image size... why
are we doing it?

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