From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org,
avi@qumranet.com, patches@x86-64.org
Cc: Justin Forbes <jmforbes@linuxtx.org>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
"Theodore Ts'o" <tytso@mit.edu>,
Randy Dunlap <rdunlap@xenotime.net>,
Dave Jones <davej@redhat.com>,
Chuck Wolber <chuckw@quantumlinux.com>,
Chris Wedgwood <reviews@ml.cw.f00f.org>,
Michael Krufky <mkrufky@linuxtv.org>,
Chuck Ebbert <cebbert@redhat.com>,
Domenico Andreoli <cavokz@gmail.com>,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
alan@lxorguk.ukuu.org.uk, Andi Kleen <ak@suse.de>,
Greg Kroah-Hartman <gregkh@suse.de>
Subject: [patch 18/20] i386: Handle P6s without performance counters in nmi watchdog
Date: Mon, 20 Aug 2007 23:56:00 -0700 [thread overview]
Message-ID: <20070821065600.GS5275@kroah.com> (raw)
In-Reply-To: <20070821065210.GA5275@kroah.com>
[-- Attachment #1: i386-handle-p6s-without-performance-counters-in-nmi-watchdog.patch --]
[-- Type: text/plain, Size: 959 bytes --]
-stable review patch. If anyone has any objections, please let us know.
------------------
From: Andi Kleen <ak@suse.de>
I got an oops while booting a 32bit kernel on KVM because it doesn't
implement performance counters used by the NMI watchdog. Handle this
case.
Cc: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
arch/i386/kernel/cpu/perfctr-watchdog.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/arch/i386/kernel/cpu/perfctr-watchdog.c
+++ b/arch/i386/kernel/cpu/perfctr-watchdog.c
@@ -346,7 +346,9 @@ static int setup_p6_watchdog(unsigned nm
perfctr_msr = MSR_P6_PERFCTR0;
evntsel_msr = MSR_P6_EVNTSEL0;
- wrmsrl(perfctr_msr, 0UL);
+ /* KVM doesn't implement this MSR */
+ if (wrmsr_safe(perfctr_msr, 0, 0) < 0)
+ return 0;
evntsel = P6_EVNTSEL_INT
| P6_EVNTSEL_OS
--
next prev parent reply other threads:[~2007-08-21 6:59 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070821064251.972690753@blue.kroah.org>
2007-08-21 6:52 ` [patch 00/20] 2.6.22-stable review Greg KH
2007-08-21 6:53 ` [patch 01/20] hwmon: fix w83781d temp sensor type setting Greg KH
2007-08-21 6:53 ` [patch 02/20] hwmon: (smsc47m1) restore missing name attribute Greg KH
2007-08-21 6:53 ` [patch 03/20] sky2: restore workarounds for lost interrupts Greg KH
2007-08-21 6:54 ` [patch 04/20] sky2: carrier management Greg KH
2007-08-21 6:54 ` [patch 05/20] sky2: check for more work before leaving NAPI Greg KH
2007-08-21 6:54 ` [patch 06/20] sky2: check drop truncated packets Greg KH
2007-08-21 6:54 ` [patch 07/20] revert "x86, serial: convert legacy COM ports to platform devices" Greg KH
2007-08-21 6:54 ` [patch 08/20] ACPICA: Fixed possible corruption of global GPE list Greg KH
2007-08-21 6:55 ` [patch 09/20] ACPICA: Clear reserved fields for incoming ACPI 1.0 FADTs Greg KH
2007-08-21 6:55 ` [patch 10/20] AVR32: Fix atomic_add_unless() and atomic_sub_unless() Greg KH
2007-08-21 6:55 ` [patch 11/20] r8169: avoid needless NAPI poll scheduling Greg KH
2007-08-21 6:55 ` [patch 12/20] forcedeth: fix random hang in forcedeth driver when using netconsole Greg KH
2007-08-21 6:55 ` [patch 13/20] libata: add ATI SB700 device IDs to AHCI driver Greg KH
2007-08-21 6:55 ` [patch 14/20] Hibernation: do not try to mark invalid PFNs as nosave Greg KH
2007-08-21 6:55 ` [patch 15/20] i386: allow debuggers to access the vsyscall page with compat vDSO Greg KH
2007-08-21 6:55 ` [patch 16/20] x86_64: Check for .cfi_rel_offset in CFI probe Greg KH
2007-08-21 6:55 ` [patch 17/20] x86_64: Change PMDS invocation to single macro Greg KH
2007-08-21 6:56 ` Greg KH [this message]
2007-08-21 6:56 ` [patch 19/20] i386: Fix double fault handler Greg KH
2007-08-21 6:56 ` [patch 20/20] JFFS2 locking regression fix Greg KH
2007-08-21 15:33 ` [patch 00/20] 2.6.22-stable review Justin M. Forbes
2007-08-23 0:10 ` [stable] " Greg KH
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