Subject: Re: [bug#31015] [PATCH] packages, scripts, utils: Respect (parallel-job-count) when xz-compressing.

From: [email-masked] (Ludovic Courtès)
Date: Sun, 13 May 2018 22:37:58 +0200

Hello Marius,

[email-masked] (Ludovic Courtès) skribis:

> Marius Bakke <[email-masked]> skribis:
>
>> * guix/packages.scm (patch-and-repack): When invoking 'xz', tell it to use the
>> amount of cores specified by e.g. 'guix build -c'.
>> * guix/scripts/pack.scm (%compressors, bootstrap-xz): Likewise.  While at it,
>> use the long form '--threads=' for clarity.
>> * guix/utils.scm (decompressed-port, compressed-port, compressed-output-port):
>> Likewise.
>
> Wasn’t there an issue that parallel xz is non-deterministic?  I vaguely
> remember something like this when we were producing with glibc tarballs
> out of the Git repo.

That was indeed the case, so I’m closing this issue.  Let’s reopen it if
we have more info or new ideas!  :-)

Ludo’.