Re: Surprisingly high use of file descriptors

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: monnier@iro.umontreal.ca,  emacs-devel@gnu.org
> Date: Thu, 05 May 2022 09:51:03 +0200
> 
> >>>>> On Thu, 05 May 2022 10:47:26 +0300, Eli Zaretskii <eliz@gnu.org> said:
> 
>     Eli> FTR, on MS-Windows the implementation uses a file handle per watch
>     Eli> (one watch for each directory), but that handle is not monitored by
>     Eli> the emulated pselect.  It also creates one thread per each watch.  
> The
>     Eli> maximum number of file handles per process on MS-Windows is AFAIK 
> very
>     Eli> large (in the millions), and the maximum number of threads per 
> process
>     Eli> is on the order of tens of thousands.
> 
> That sounds like something Someone™ could use to write a proper 'poll'
> emulation ☺️

What for? for file notifications we don't use any poll-like interface
anyway.

> (I think gnulib has one, but I haven't looked at it).

Isn't is still limited to 64 handles?