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Date: Tue, 25 Aug 2009 21:33:58 +0200 From: Ingo Molnar <mingo@...e.hu> To: Ravikiran G Thirumalai <kiran@...lex86.org> Cc: Yinghai Lu <yinghai@...nel.org>, Cyrill Gorcunov <gorcunov@...il.com>, torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org, shai@...lex86.org, Suresh Siddha <suresh.b.siddha@...el.com> Subject: Re: [patch] x86: 2.6.31-rc7 crash due to buggy flat_phys_pkg_id * Ravikiran G Thirumalai <kiran@...lex86.org> wrote: > On Tue, Aug 25, 2009 at 11:50:56AM -0700, Yinghai Lu wrote: > >Cyrill Gorcunov wrote: > > > >initial apic id and apic id could be different. > > > >and we should use initial apic id to get correct phys pkg id in case BIOS set crazy apic id. > > > > Is there a specific bug we are fixing here? Again, this behavior > was present from atleast 2.6.15-2.6.30 on 'flat' and older > 'cluster' apics, and intel documentation suggests local apic be > used. Is there a specific bios bug that is being fixed? > > (The BIOS is not supposed to set a crazy apic ID. The BIOS is > buggy in that case -- Quoting section 9.4.6 from Intel System > programming guide vol 3A part 1: That means very little. If Yinghai fixed a real bug in an existing system we should consider it. Yinghai? Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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