Re: Some experience with the igc branch

[Pip Cet via "Emacs development discussions." <emacs-devel@gnu.org>]

Óscar Fuentes <ofv@wanadoo.es> writes:

> Pip Cet <pipcet@protonmail.com> writes:
>
>>> Redisplay just stopped while showing the menu, no crash nor infinite
>>> loop, its CPU usage was typical for the repeating timers that my config
>>> creates.
>>
>> That's a bit odd.  It might be the signal issue, but that's purely a
>> guess.  If it happens again, please let us know.
>
> Sure.

I'm not a hundred percent sure, because I was testing other changes, but
I just observed an Emacs session in a very similar state to what you
describe: very little but nonzero CPU usage, but unresponsive to X
interactions.  I attached gdb, observed it was stuck in read_char, then
I messed up and set Vquit_flag to Qt, at which point the Emacs session
recovered and seems fully usable once more (it did take a while to do
so, though).  So no valuable debug info this time, hope I'll hit it
again.

Again, it's possible this is a similar-looking but different bug,
possibly caused by local changes.

I don't think read_char or its subroutines even use MPS memory, though?
As this is a GTK build, and yours wasn't, we should probably look at X
interaction code shared between the GTK and non-GTK builds.

Pip