linux-kernel - Re: [GIT PULL] sched/core for v2.6.32

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Message-ID: <12c511ca0909111924s42d000dsbf378009d9434ddc@mail.gmail.com>
Date:	Fri, 11 Sep 2009 19:24:38 -0700
From:	Tony Luck <tony.luck@...el.com>
To:	Jesper Juhl <jj@...osbits.net>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>
Subject: Re: [GIT PULL] sched/core for v2.6.32

On Fri, Sep 11, 2009 at 4:34 PM, Jesper Juhl <jj@...osbits.net> wrote:
> That may be so; but most people I've ever talked to about multiple
> processes, fork, vfork and the like, have mostly assumed child-runs-first.
> That is just my personal experience.
> So I get worried when that assumption is made false.

With multi-core cpus becoming (being?) the norm, almost all systems
are SMP now.  So child and parent can surely end up running in parallel
very often.  So applications that make assumptions about child running
first are going to be frequently surprised.  Aren't they?

-Tony
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