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From: Tobias Geerinckx-Rice <me@tobias.gr>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: John Soo <jsoo1@asu.edu>, guix-devel@gnu.org
Subject: Re: RFC: subcommand to pause/resume builds
Date: Tue, 03 Nov 2020 17:32:29 +0100	[thread overview]
Message-ID: <87ft5q4d0i.fsf@nckx> (raw)
In-Reply-To: <87zh3yczss.fsf@gnu.org>

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Ludo',

Ludovic Courtès 写道:
> First, note that the daemon is unaware of “packages”, it only 
> knows
> about “derivations”.

Derivations have a (file) name, which can be matched with a regex 
allowing one to, say, ‘pause libreoffice’.  It works in practice. 
I do this often & it's *extremely* convenient.

Sometimes even necessary, because I have a habit of starting too 
many builds ;-)  It's nice not to lose 6h of work.

Not every handy hack needs to be upstreamed though.  ‘It's fugly’ 
is a strong argument in Guixland, and I like that.

However, this is FUD:

> Last, you’d need to send SIGTSTP to the whole process group of 
> the
> build, like so (I think, haven’t tried):
>
>   sudo kill -TSTP -123
>
> where 123 is the “SessionPID” shown by ‘guix processes’. 
> However, doing
> so may affect build results: processes in the build environment 
> might
> handle SIGTSTP specially, which can have side effects.  It’s an
> observable action.

Kind regards,

T G-R, now thinking about acronyms like ‘CRIU’ and what a 
next-level hack would look like...

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  parent reply	other threads:[~2020-11-03 16:32 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-02 18:56 RFC: subcommand to pause/resume builds John Soo
2020-11-03 13:53 ` Ludovic Courtès
2020-11-03 14:41   ` John Soo
2020-11-03 16:32   ` Tobias Geerinckx-Rice [this message]
2020-11-03 17:12     ` John Soo
2020-11-06  8:56       ` Ludovic Courtès
2020-11-03 17:19     ` Tobias Geerinckx-Rice
2020-11-03 18:27       ` John Soo
2020-11-03 20:01       ` John Soo
2020-11-06  8:58         ` Ludovic Courtès
2020-11-06 23:00           ` John Soo
2020-11-04 10:28   ` Bengt Richter
2020-11-06 21:11   ` Mark H Weaver
2020-11-08 16:30     ` Ludovic Courtès
  -- strict thread matches above, loose matches on Subject: below --
2020-11-05  4:37 John Soo

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