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bug#33275: 27.0.50; Image cache pruning
From: |
Eli Zaretskii |
Subject: |
bug#33275: 27.0.50; Image cache pruning |
Date: |
Mon, 05 Nov 2018 20:18:17 +0200 |
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 33275@debbugs.gnu.org
> Date: Mon, 05 Nov 2018 18:36:39 +0100
>
> It would be reasonable if the code had asked for those images to be kept
> in memory, but it hasn't. Emacs decides that on its own without saying
> that it's doing that.
You cannot assume anything about memory management while a Lisp
program runs.
> It'd be similarly surprising if
>
> (dolist (file (directory-files "/directory/with/many/images" t "png$"))
> (with-temp-buffer
> (insert-file-contents-literally file)))
>
> were to lead to Emacs growing uncontrollably.
That it doesn't is just sheer luck: the way we manage buffer memory is
special. With any other Lisp object, it could well grow
uncontrollably. Our way of keeping that in check is to signal
memory-full error when we are about to run out of memory. Not sure
yet why this doesn't happen in your original recipe.
> > I think we should try to add some code that would call
> > display_malloc_warning and/or memory_full, before the system runs out
> > of memory. That should be enough to prevent OOM in such cases. Can
> > you spot why we never called memory_full in this case?
>
> Sorry, I'm not familiar with the memory_full stuff...
OK, I will try to look into this soon.
- bug#33275: 27.0.50; Image cache pruning, (continued)
- bug#33275: 27.0.50; Image cache pruning, Lars Ingebrigtsen, 2018/11/05
- bug#33275: 27.0.50; Image cache pruning, Lars Ingebrigtsen, 2018/11/05
- bug#33275: 27.0.50; Image cache pruning, Eli Zaretskii, 2018/11/05
- bug#33275: 27.0.50; Image cache pruning, Eli Zaretskii, 2018/11/05
- bug#33275: 27.0.50; Image cache pruning, Lars Ingebrigtsen, 2018/11/05
- bug#33275: 27.0.50; Image cache pruning, Eli Zaretskii, 2018/11/05
- bug#33275: 27.0.50; Image cache pruning, Lars Ingebrigtsen, 2018/11/09
- bug#33275: 27.0.50; Image cache pruning, Eli Zaretskii, 2018/11/06
- bug#33275: 27.0.50; Image cache pruning, Lars Ingebrigtsen, 2018/11/09
- bug#33275: 27.0.50; Image cache pruning, Eli Zaretskii, 2018/11/10
- bug#33275: 27.0.50; Image cache pruning,
Eli Zaretskii <=
- bug#33275: 27.0.50; Image cache pruning, Lars Ingebrigtsen, 2018/11/05
- bug#33275: 27.0.50; Image cache pruning, Eli Zaretskii, 2018/11/05