Re: [RFC] nptl: change default stack guard size of threads

[Florian Weimer <fweimer at redhat dot com>]

On 12/06/2017 02:10 PM, Wilco Dijkstra wrote:
> Florian Weimer wrote:
> > On 11/29/2017 11:38 PM, Carlos O'Donell wrote:
> > > On 11/29/2017 02:28 PM, Wilco Dijkstra wrote:
> > > > Why should it be any different from LP64? Typical page size will still be
> > > > 64KB, so a 4KB guard would be rounded up to 64KB. An ILP32 system
> > > > with 64KB pages could create  ~30000 threads per process. Does that
> > > > make it unusable?
> > >
> > > ... and this is already configurable via pthread_attr_setguardsize(), so
> > > you *could* tune a system to have smaller guards against the recommendation
> > > of the runtime authors?
> >
> > Sure, if you recompile your application.  That's not really a solution IMHO.
>
> You've got to do that already in order to run it on ILP32 - there isn't exactly
> a large amount of existing ILP32 binaries around, let alone ones that need more
> than 30000 threads per process.

I wasn't talking about aarch64 ILP32, and I suspect neither was Carlos.

In my world, if you still have 32-bit binaries, it's because you lost 
the sources or the tools or knowledge to build them at some point.

Thanks,
Florian