Re: [patch] Fix for BZ 22207 -- intermittent failure to create threads on 32-bit machines

[Florian Weimer <fweimer at redhat dot com>]

On 09/26/2017 08:23 AM, Paul Pluzhnikov wrote:
> On Mon, Sep 25, 2017 at 11:04 PM, Florian Weimer <fweimer@redhat.com> wrote:
> > On 09/26/2017 02:09 AM, Paul Pluzhnikov wrote:
> > > +  /* With default 8MiB Linux stack size, creating 1024 threads can cause
> > > +     VM exhausiton on 32-bit machines.  Reduce stack size of each thread to
> > > +     128KiB for a maximum required VM size of 128MiB.  */
> > > +  xpthread_attr_setstacksize (&attr, 128 * 1024);
> >
> >
> > Is there a reason why you do not use PTHREAD_STACK_MIN?
>
> It would possibly work here, but often PTHREAD_STACK_MIN doesn't leave
> enough space to run any code at all: the limit is minimal acceptable
> to the pthread library, not a "reasonable default if your call chains
> aren't deep".

Agreed, PTHREAD_STACK_MIN would not work here.

Thanks,
Florian