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From: Keith Mannthey <kmannth@gmail.com>
To: Bharath Ramesh <krosswindz@gmail.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Only one processor detected in 8-Way opteron in 32-bit mode
Date: Thu, 1 Dec 2005 15:27:40 -0800	[thread overview]
Message-ID: <a762e240512011527s69053b8eg13ec4674c3e36b07@mail.gmail.com> (raw)
In-Reply-To: <c775eb9b0512011315y40bdbf30w172583cd85e92fa6@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 422 bytes --]

Looks like something odd is going on with your processor apic id's.

Lines like
Processor #20 INVALID. (Max ID: 256)
are bad...

Could you try the following patch with i386?  It seems suspect to me
and could help identify the problem.

Your box has high processor apic ids and looks to be in flat apic mode
(versus clustered).  I think the code is assuming the box is in
clustered apic mode?

Thanks,
Keith

[-- Attachment #2: apicid.fix --]
[-- Type: application/octet-stream, Size: 344 bytes --]

--- arch/i386/kernel/mpparse.c.orig	2005-12-01 15:20:51.000000000 -0800
+++ arch/i386/kernel/mpparse.c	2005-12-01 15:21:19.000000000 -0800
@@ -112,9 +112,10 @@
 #else
 static int MP_valid_apicid(int apicid, int version)
 {
-	if (version >= 0x14)
+/*	if (version >= 0x14)
 		return apicid < 0xff;
 	else
+*/
 		return apicid < 0xf;
 }
 #endif



  reply	other threads:[~2005-12-01 23:27 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-12-01 21:15 Only one processor detected in 8-Way opteron in 32-bit mode Bharath Ramesh
2005-12-01 23:27 ` Keith Mannthey [this message]
2005-12-02  0:51   ` Bharath Ramesh
2005-12-02  1:12     ` Bharath Ramesh
2005-12-02  1:42       ` Keith Mannthey
2005-12-02  2:32         ` Bharath Ramesh
2005-12-02 15:32         ` Bharath Ramesh
2005-12-02 22:07           ` Keith Mannthey
     [not found]             ` <c775eb9b0512021534y693f3bf3i4b85b7cb0dcb08b6@mail.gmail.com>
     [not found]               ` <a762e240512021701q4ea436d9u563704c4daeb7584@mail.gmail.com>
2005-12-03  2:06                 ` Bharath Ramesh
2005-12-06 21:32                   ` Bill Davidsen
2005-12-14  2:02                     ` Bharath Ramesh
2005-12-03 22:21             ` Andi Kleen
2005-12-04 14:24               ` Bharath Ramesh
2005-12-04 17:27                 ` Matti Aarnio

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