From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
To: suresh.b.siddha@intel.com,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: yinghai@kernel.org, Ingo Molnar <mingo@elte.hu>,
lkml <linux-kernel@vger.kernel.org>,
stable@kernel.org
Subject: [PATCH] Make Intel 8-way Xeons boot again
Date: Sat, 9 Jan 2010 15:40:38 +0530 [thread overview]
Message-ID: <20100109101038.GA17555@in.ibm.com> (raw)
On an 8-way system with Intel Xeon X7350 CPUs, booting 2.6.32 or newer
kernels fails at:
...
CPU0: Intel(R) Xeon(R) CPU X7350 @ 2.93GHz stepping 0b
Booting Node 0, Processors #1 #2 #3 #4 #5 #6 #7 Ok.
Brought up 8 CPUs
Total of 8 processors activated (46906.05 BogoMIPS).
Git bisect showed 2fbd07a5f as the offending commit.
With the patch below, I am able to boot the latest Linus' git tree on
the machine. If this patch is correct, it needs to get into the stable
tree too.
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
---
Index: linux-2.6/arch/x86/kernel/apic/probe_64.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/probe_64.c 2010-01-09 14:54:29.000000000 +0530
+++ linux-2.6/arch/x86/kernel/apic/probe_64.c 2010-01-09 14:57:53.000000000 +0530
@@ -70,7 +70,7 @@
if (apic == &apic_flat) {
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_INTEL:
- if (num_processors > 8)
+ if (num_processors >= 8)
apic = &apic_physflat;
break;
case X86_VENDOR_AMD:
next reply other threads:[~2010-01-09 10:10 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-09 10:10 Ananth N Mavinakayanahalli [this message]
2010-01-09 18:11 ` [PATCH] Make Intel 8-way Xeons boot again Linus Torvalds
2010-01-09 22:51 ` Yinghai Lu
2010-01-11 17:38 ` Suresh Siddha
2010-01-09 21:13 ` Yinghai Lu
2010-01-10 2:30 ` Ananth N Mavinakayanahalli
2010-01-10 6:35 ` Yinghai Lu
2010-01-10 10:26 ` Ingo Molnar
2010-01-11 4:53 ` [PATCH] Revert 2fbd07a5f so machines with BSPs phsyical apic id != 0 can boot Ananth N Mavinakayanahalli
2010-01-11 21:39 ` Suresh Siddha
2010-01-11 22:55 ` Linus Torvalds
2010-01-11 23:45 ` Suresh Siddha
2010-01-11 23:51 ` Suresh Siddha
2010-01-12 0:46 ` Linus Torvalds
2010-01-12 0:50 ` Linus Torvalds
2010-01-12 2:27 ` Suresh Siddha
2010-01-14 0:03 ` Yuhong Bao
2010-01-11 21:43 ` [PATCH] Make Intel 8-way Xeons boot again Yinghai Lu
2010-01-11 21:53 ` Suresh Siddha
2010-01-12 19:10 ` Yinghai Lu
2010-01-12 20:20 ` Suresh Siddha
2010-01-12 21:02 ` H. Peter Anvin
2010-01-12 21:07 ` Suresh Siddha
2010-01-12 22:46 ` Suresh Siddha
2010-01-13 4:42 ` Ananth N Mavinakayanahalli
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