linux-kernel - Re: [PATCH] x86: update mptable v7

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Message-ID: <4859FCA4.4050606@zytor.com>
Date:	Wed, 18 Jun 2008 23:28:52 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yhlu.kernel@...il.com>
CC:	Len Brown <lenb@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: update mptable v7

Yinghai Lu wrote:
>> Can somebody clue me into why this concept
>> is something other than totally insane?
> 
> for system that have 6 pcie slots and more, with full populated cards.
> when boot with mptable, BIOS will use irq < 16 for all pci devices,
> and several devices will share same irq.
> but when acpi is enabled, irqs are spanned all over.
> 
> also when pci card with several pci bridges is plugged in, the mptable
> is totally messed up, some slot will work, and some doesn't work.

And the reason to worry about supporting non-ACPI on such hardware is what?

	-hpa
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