From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 23 Oct 2009 07:51:51 +0000
Subject: Re: Commit 34d76c41 causes linker errors on ia64 with NR_CPUS=4096
Message-Id: <20091023075151.GB10067@elte.hu>
List-Id: <linux-ia64.vger.kernel.org>
References: <4ADD54D4.70808@kernel.org> <4ADD5530.3050107@kernel.org> <alpine.LSU.2.00.0910200826220.8582@wotan.suse.de> <4ADDC69A.5000701@suse.com> <4ADDCDED.6060706@suse.com> <20091021061109.GA27195@elte.hu> <4ADF2691.7070304@kernel.org> <57C9024A16AD2D4C97DC78E552063EA3E337CF79@orsmsx505.amr.corp.intel.com> <alpine.LSU.2.00.0910221640430.8582@wotan.suse.de> <57C9024A16AD2D4C97DC78E552063EA3E337D94C@orsmsx505.amr.corp.intel.com>
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To: "Luck, Tony" <tony.luck@intel.com>
Cc: Jiri Kosina <jkosina@suse.cz>, Tejun Heo <tj@kernel.org>, Jeff Mahoney <jeffm@suse.com>, Peter Zijlstra <peterz@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, "Yu, Fenghua" <fenghua.yu@intel.com>, "linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>


* Luck, Tony <tony.luck@intel.com> wrote:

> > Tony, is the change that will eventually have to be made to ia64 
> > pagefault handler too intrusive for -rc6, and should we rather go 
> > with my workaround instead, and try to find something proper for 
> > 2.6.33?
> 
> Using __alloc_percpu() rather than static declaration looks to be the 
> right fix here.  Not a "workaround".

It is a workaround for the IA64 build failure.

It's also an improvement of the scheduler code (we generally try to 
eliminate NR_CPUs scaling of allocations) - but code improvements need 
to happen much sooner than -rc6/-rc7.

	Ingo