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

[Florian Weimer]

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