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

From: Szabolcs Nagy <nsz at port70 dot net>
To: Florian Weimer <fweimer at redhat dot com>
Cc: Rich Felker <dalias at libc dot org>, Szabolcs Nagy <szabolcs dot nagy at arm dot com>, GNU C Library <libc-alpha at sourceware dot org>, nd at arm dot com, Jeff Law <law at redhat dot com>, Richard Earnshaw <Richard dot Earnshaw at arm dot com>, Wilco Dijkstra <Wilco dot Dijkstra at arm dot com>, James Greenhalgh <James dot Greenhalgh at arm dot com>
Date: Thu, 30 Nov 2017 00:13:44 +0100
Subject: Re: [RFC] nptl: change default stack guard size of threads
Authentication-results: sourceware.org; auth=none
References: <5A1ECB40.9080801@arm.com> <76c38ecf-6497-c96c-5c8c-95cceed100a5@redhat.com> <5A1EFF28.9050406@arm.com> <5c796246-1907-8cf4-00fc-eee11614b092@redhat.com> <20171129205148.GG1627@brightrain.aerifal.cx> <00c123b5-dd46-6777-2c24-d80eae8d35df@redhat.com>

* Florian Weimer <fweimer@redhat.com> [2017-11-29 22:02:48 +0100]:
> On 11/29/2017 09:51 PM, Rich Felker wrote:
> > Hm? What are you thinking of that GCC might have gotten wrong?
> 
> Use 64 KiB probe intervals (almost) everywhere as an optimization.  I
> assumed the original RFC patch was motivated by that.
> 
> I knew that ARM would be broken because that's what the gcc ARM maintainers
> want.  I assumed that it was restricted to that, but now I'm worried that
> it's not.

no,
it was just much easier to post the patch without setting a
value for each target separately, i believe that larger guard
is useful on all 64bit targets, but to make the patch depend
on __WORDSIZE is also wrong since i knew i'd need different
setting for aarch64 ilp32

References:
- [RFC] nptl: change default stack guard size of threads
  - From: Szabolcs Nagy
- Re: [RFC] nptl: change default stack guard size of threads
  - From: Florian Weimer
- Re: [RFC] nptl: change default stack guard size of threads
  - From: Szabolcs Nagy
- Re: [RFC] nptl: change default stack guard size of threads
  - From: Florian Weimer
- Re: [RFC] nptl: change default stack guard size of threads
  - From: Rich Felker
- Re: [RFC] nptl: change default stack guard size of threads
  - From: Florian Weimer

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