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

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On Wed, Jun 3, 2015 at 7:30 PM, Lucas De Marchi
<lucas.de.marchi@xxxxxxxxx> wrote:
> On Mon, Jun 1, 2015 at 3:26 AM, Rusty Russell <rusty@xxxxxxxxxxxxxxx> wrote:
>> Andreas Mohr <andi@xxxxxxxx> writes:
>>> Hi,
>>>
>>> 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".
>
> Regarding the "default configuration", there's no such thing. Each distribution
> uses a different one.

You could add something similar to this:

$ /usr/lib/systemd/systemd --version
systemd 220
+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP
+LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS
+KMOD +IDN

Kay
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