linux-kernel - Re: [PATCH] - Fix stack overflow for large values of MAX

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Message-ID: <20080620102733.GB32500@elte.hu>
Date:	Fri, 20 Jun 2008 12:27:33 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jack Steiner <steiner@....com>
Cc:	tglx@...utronix.de, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH] - Fix stack overflow for large values of MAX_APICS


* Jack Steiner <steiner@....com> wrote:

> physid_mask_of_physid() causes a huge stack (12k) to be created if the 
> number of APICS is large. Replace physid_mask_of_physid() with a new 
> function that does not create large stacks. This is a problem only on 
> large x86_64 systems.

ah, that indeed makes sense. Applied to tip/x86/uv - thanks Jack.

> Ingo - the "Increase MAX_APICS patch" can now works. Do you want me to 
> resend???

no need, i have reactivated it in tip/x86/uv. (after your 
physid_mask_of_physid() patch, so that it's still all bisectable)

	Ingo
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