linux-kernel - Re: [PATCH] modules: CONFIG_MODULE_COMPRESS: add hint that userspace support may easily be missing.

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Message-ID: <20150604131946.6441b568@canb.auug.org.au>
Date:	Thu, 4 Jun 2015 13:19:46 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Lucas De Marchi <lucas.de.marchi@...il.com>,
	Andreas Mohr <andi@...as.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Bertrand Jacquin <beber@...eeweb.net>,
	Marco d'Itri <md@...ux.it>,
	linux-modules <linux-modules@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>, Jon Masters <jcm@...hat.com>
Subject: Re: [PATCH] modules: CONFIG_MODULE_COMPRESS: add hint that
 userspace support may easily be missing.

Hi Rusty,

On Thu, 04 Jun 2015 11:00:41 +0930 Rusty Russell <rusty@...tcorp.com.au> wrote:
>
> Lucas De Marchi <lucas.de.marchi@...il.com> writes:
> > On Mon, Jun 1, 2015 at 3:26 AM, Rusty Russell <rusty@...tcorp.com.au> wrote:
> >> Andreas Mohr <andi@...as.de> writes:
> >>>
> >>> I just had a not so nice experience
> >>> when finally upgrading to a new 4.1-rc5
> >>> with CONFIG_MODULE_COMPRESS newly enabled -
> >>> userspace binary parts (kmod 18 or 20 in my case)
> >>> did not have compression enabled
> >>> (at least on Debian 8pre, vs. encountering it enabled on FC21)
> >>> since it does not seem to be
> >>> the default build configuration of kmod (yet?).
> >>
> >> Sure.  Let's get the maintainers to insert the actual version required
> >> in the help text though.
> >
> > kmod supports gz since the first version and xz since version 3.  So both
> > of them can be safely fall into "it's supported since the beginning of
> > kmod IMO".
> 
> Thanks, that's what I needed.
> 
> But disappointing that Debian doesn't configure with it, and there's no
> easy way to check it.  Looks like Ubuntu vivid is the same.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=772628

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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