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Re: Emacs can't start-process more than 30~40 processes



----- Original Message ----- From: "Corinna Vinschen"


On Jul 29 19:25, Christopher Faylor wrote:
On Wed, Jul 29, 2009 at 03:32:28PM +0800, Haojun Bao wrote:
>Christopher Faylor <cgf-use-the-mailinglist-please@cygwin.com> writes:
>
>> On Tue, Jul 28, 2009 at 10:52:44AM +0800, Haojun Bao wrote:
>>>I have debugged it again, and I think I have more clue. I have read the
>>>how-cygheap-works.txt, and this might be a known problem.
>>>[...]
>> it is a "small" number then something is wrong and we're allocating too
>> much of the cygheap.  The cygheap was always supposed to be relatively
>> small.  Maybe we're abusing it too much in 1.7.
>
>There are quite some fds. In start-process, emacs will allocate 1 PTY
>and 1 pipe for each process it starts.

Yes, I assumed that there were a bunch of fds but I was looking for an
exact number rather than "quite some".  I can't give exact details about
how to find the number now but I thought that since you were looking at
the code it wouldn't be too hard to figure this value out.

Anyway, Corinna has a stopgap fix for this which will probably show up
in a 1.7.0-* release sometime soon.

The stopgap fix is in 1.7.0-53.

Ahh this might also be the cause of the issue we where seeing when I started the thread:- maximum number of cygwin processes per user?

   Regards
   Steve


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