GNU bug report logs - #49439
grafts cause “guix environment” to get killed with OOM

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#49439: closed (grafts cause “guix environment” to get killed with OOM)
Date: Tue, 10 Aug 2021 15:37:02 +0000

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Your message dated Tue, 10 Aug 2021 17:36:27 +0200
with message-id <87v94dpb0k.fsf <at> gnu.org>
and subject line Re: bug#49439: grafts cause “guix environment” to get killed with OOM
has caused the debbugs.gnu.org bug report #49439,
regarding grafts cause “guix environment” to get killed with OOM
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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49439: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=49439
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From: Ricardo Wurmus <rekado <at> elephly.net>
To: bug-guix <at> gnu.org
Subject: grafts cause “guix environment” to get
 killed with OOM
Date: Tue, 06 Jul 2021 16:38:28 +0200

With a recent version of Guix, “guix environment” will not 
terminate on its own, keeps the CPU busy, and gets killed when the 
system eventually runs out of memory.

$ guix describe -f channels

--8<---------------cut here---------------start------------->8---
(list (channel
       (name 'guix)
       (url "/home/rekado/dev/gx/branches/master")
       (commit
         "685cfdec94e5e48c4ad28de53466a28dfc258edb")))
--8<---------------cut here---------------end--------------->8---


$ guix environment pigx-scrnaseq
[wait until it gets killed]

The problem disappears when grafts are disabled:

$ guix environment --no-grafts pigx-scrnaseq
$ [env] yay!

-- 
Ricardo

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Sarah Morgensen <iskarian <at> mgsn.dev>
Cc: Ricardo Wurmus <rekado <at> elephly.net>, 49439-done <at> debbugs.gnu.org
Subject: Re: bug#49439: grafts cause “guix environment” to get killed with OOM
Date: Tue, 10 Aug 2021 17:36:27 +0200

Hello!

Ludovic Courtès <ludo <at> gnu.org> skribis:

> I added counters and ‘pk’ calls in ‘map/accumulate-builds’ & co. to see
> what happens.  AFAICS, a cutoff as in the attached patch does the job.
> It’s a basic heuristic to avoid unbounded growth, at the expense of
> possibly reduced accumulation.  For example, here’s the effect on my
> user profile with 300+ packages:

Pushed as fa81971cbae85b39183ccf8f51e8d96ac88fb4ac.

I saw your message on IRC, Sarah; note that because grafts are “dynamic
dependencies” (they depend on previous build results), we cannot know in
advance which grafts we’re going to build, so there’s necessarily at
least a second phase during which grafts get built.  See
<https://guix.gnu.org/en/blog/2020/grafts-continued/> for background.

Thanks!

Ludo’.

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