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Re: Snapshot 20120214: fork: can't reserve memory for stack

On Feb 15 14:01, Eric Blake wrote:
> On 02/15/2012 01:47 PM, Corinna Vinschen wrote:
> > On Feb 15 11:45, Jehan Bing wrote:
> >> I'm getting the following error starting with cygwin snapshot
> >> 20120214 when running a git command:
> >>
> >> $ git add bigfile-test.dll
> >>       0 [main] git 7440 D:\dev_apps\cygwin\bin\git.exe: *** fatal
> >> error in forked process - fork: can't reserve memory for stack
> >> 0xAD0000 - 0xBD0000, Win32 error 487
> > 
> > I can't reproduce that (also on W7).  How big is bigfile-test.dll?
> > 
> > Eric, does git use pthreads and fork from a thread, by any chance?
> /me rummages around in git.git
> Well, it certainly has both pthread_create and fork calls in the same
> files (at least run-command.c), although I'm not quire sure if it tries
> to actually fork from a pthread rather than from the main thread.

Ok, thanks anyway.  I think I know what happens.  Two days ago I thought
it is a good idea to use the Windows-provided stack from CreateThread by
default (== if the application didn't provide its own).  Too bad that
Windows creates the stacks typically in the lower regions of the
processes VM.  I guess I have to revert that, so that pthread_create
always uses a self-created stack again.  Oh well.  So much for "good


Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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