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bug#36855: guix system switch-generation doesn't

From: Jakob L. Kreuze
Subject: bug#36855: guix system switch-generation doesn't
Date: Wed, 28 Aug 2019 14:33:18 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux)

Hi Mark,

Mark H Weaver <address@hidden> writes:

> Hello again,
> Mark H Weaver <address@hidden> writes:
>> As a bonus, this approach might solve another issue I've observed: on my
>> Guix system, where I build everything locally, several derivations are
>> built *during* activation.  Based on the terminal output, I get the
>> impression that the system is compiling things while the system in an
>> intermediate state, when some of the activation steps have been done,
>> but not all of them.
>> As I recall, the derivations built during activation are limited to
>> compiled modules for Guile, but it still sometimes takes on the order of
>> a minute or two on my laptop to complete the "activating system" steps.
>> This seems suboptimal.
>> The next time I update my system, I'll try to remember to keep a
>> transcript of this, so that I can be more specific.
> Here's a transcript:
> activating system...
> building 
> /gnu/store/fbp6bbxw9cf617fmk57sddrz7zfsfw5p-module-import-compiled.drv...
> building 
> /gnu/store/wfi6hnr9ggal0s1d32xx5wbl5k5wqlvx-switch-to-system.scm.drv...
> making '/gnu/store/mjzk53ia3bajn08lscpyzz5apcw3r70g-system' the current 
> system...
> setting up setuid programs in '/run/setuid-programs'...
> populating /etc from /gnu/store/l7r1has973n26hfqrs6vxbi94xzgh360-etc...
> building 
> /gnu/store/h2fqcxv3xx14lkdhyphm3lawkayw7sdl-module-import-compiled.drv...
> building 
> /gnu/store/dar9smjyxmri6v6cchnmp5mpyiimyx64-install-bootloader.scm.drv...
> guix system: bootloader successfully installed on '/dev/sda'
> building 
> /gnu/store/vkk3h5p799lfpmf6msdhrzlq0wqvk3zq-module-import-compiled.drv...
> building 
> /gnu/store/hn8sr8p13gg2mf379xawscabckp03fkb-upgrade-shepherd-services.scm.drv...
> shepherd: Evaluating user expression (let* ((services (map primitive-load 
> (?))) # ?) ?).
> guix system: warning: only 3.9% of free space available on /gnu/store
> hint: Consider deleting old profile generations and collecting garbage, along 
> these lines:
>      guix gc --delete-generations=1m
>        Mark

Thanks for the input; I wasn't aware that the activation process was
taking so long for some people. One of Ludovic's suggestions was to
create a single derivation, rather than three, to speed up system
activation. I'll look into this further.


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