linux-kernel - Re: pthread_create() slow for many threads; also time to revisit 64b context switch optimization?

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Message-ID: <20080815190034.GA15356@elte.hu>
Date:	Fri, 15 Aug 2008 21:00:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Ulrich Drepper <drepper@...il.com>
Cc:	Jamie Lokier <jamie@...reable.org>,
	Arjan van de Ven <arjan@...radead.org>,
	akpm@...ux-foundation.org, hugh@...itas.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, briangrant@...gle.com,
	cgd@...gle.com, mbligh@...gle.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: pthread_create() slow for many threads; also time to revisit
	64b context switch optimization?


* Ulrich Drepper <drepper@...il.com> wrote:

> On Fri, Aug 15, 2008 at 10:19 AM, Ingo Molnar <mingo@...e.hu> wrote:
> > ( also, just to make sure: all Linux kernel versions will ignore such
> >  extra flags, so you can just update glibc to use this flag
> >  unconditionally, correct? )
> 
> As soon as the patch hits Linus' tree I can change the code.

it's upstream now:

| commit cd98a04a59e2f94fa64d5bf1e26498d27427d5e7
| Author: Ingo Molnar <mingo@...e.hu>
| Date:   Wed Aug 13 18:02:18 2008 +0200
|
|     x86: add MAP_STACK mmap flag

thanks everyone,

	Ingo
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