bug#49439: closed (grafts cause “guix environment” to get killed with OOM)

[GNU bug Tracking System]

Your message dated Tue, 10 Aug 2021 17:36:27 +0200
with message-id <87v94dpb0k.fsf@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.

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-- 
49439: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=49439
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> --- Begin Message ---
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> Subject: 
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> grafts cause “guix environment” to get killed with OOM
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> Date: 
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> Tue, 06 Jul 2021 16:38:28 +0200
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> User-agent: 
>
> mu4e 1.4.15; emacs 27.2
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>
>
>
> 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
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
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> Re: bug#49439: grafts cause “guix environment” to get killed with OOM
>
>
>
>
> Date: 
>
> Tue, 10 Aug 2021 17:36:27 +0200
>
>
>
>
> User-agent: 
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> Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)
>
>
>
>
> Hello!
>
> Ludovic Courtès <ludo@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’.
>
>
> --- End Message ---