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From: David Brown <david.brown@hesbynett.no>
Newsgroups: comp.arch
Subject: Re: Segments
Date: Fri, 17 Jan 2025 10:20:43 +0100
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On 16/01/2025 22:40, Scott Lurndal wrote:
> David Brown <david.brown@hesbynett.no> writes:
>> On 16/01/2025 17:46, Waldek Hebisch wrote:
> 
>> You don't allocate anything in a VLA without knowing the bounds and
>> being sure it is appropriate to put on the stack.  You don't allocate
>> anything on the heap without knowing the bounds and being sure it is
>> appropriate.  There's no fundamental difference - it's just the cut-off
>> point that is different.
>>
>> The stack on Linux is 10 MB by default, and 1 MB by default on Windows.
> 
> On all the linux systems I use, the stack limit defaults to 8192KB.

OK.  The details don't matter much here.  (Of course, if you are 
intending to put large objects on the stack, then the details /do/ 
matter, and you probably want to specify a minimum stack size explicitly.)

> 
> That includes RHEL, Fedora, CentOS, Scientific Linux and Ubuntu.
> 
> Now, that's for the primary thread stack, for which the OS
> manages the growth.   For other threads in the process,
> the size varies based on the threads library in use
> and whether the application is compiled for 32-bit or
> 64-bit systems.
>