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To: Ulrich Drepper <drepper@redhat.com>
Cc: linux-kernel@vger.kernel.org, dank@kegel.com
Subject: Re: Hardware limits on numbers of threads?
References: <3D88208E.8545AAA2@kegel.com> <3D882500.2000105@redhat.com>
From: Andi Kleen <ak@muc.de>
Date: 19 Sep 2002 11:36:11 +0200
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Ulrich Drepper <drepper@redhat.com> writes:


> This was and is true with the kernel before 2.5.3<mumble> when Ingo
> introduced TLS support since the thread specific data had to be
> addressed via LDT entries and the LDT holds at most 8192 entries.  The
> GDT based solution now implemented in the kernel has no such
> limitation and the number of threads you can create with the new
> thread library is only limited by system resources.

It also was alwas incorrect for x86-64/64bit progreams, which do not 
use a LDT entry for each thread.

-Andi
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