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* Revert "x86: fix ioapic bug again"Ingo Molnar2008-06-121-7/+2
| | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 6e908947b4995bc0e551a8257c586d5c3e428201. Németh Márton reported: | there is a problem in 2.6.26-rc3 which was not there in case of | 2.6.25: the CPU wakes up ~90,000 times per sec instead of ~60 per sec. | | I also "git bisected" the problem, the result is: | | 6e908947b4995bc0e551a8257c586d5c3e428201 is first bad commit | commit 6e908947b4995bc0e551a8257c586d5c3e428201 | Author: Ingo Molnar <mingo@elte.hu> | Date: Fri Mar 21 14:32:36 2008 +0100 | | x86: fix ioapic bug again the original problem is fixed by Maciej W. Rozycki in the tip/x86/apic branch (confirmed by Márton), but those changes are too intrusive for v2.6.26 so we'll go for the less intrusive (repeated) revert now. Reported-and-bisected-by: Németh Márton <nm127@freemail.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* ftrace: add notrace annotations for NMI routinesSteven Rostedt2008-04-191-1/+2
| | | | | | | | | | This annotates NMI functions with notrace. Some tracers may be able to live with this, but some cannot. The safest is to turn it off, it's not particularly interesting anyway. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: fix ioapic bug againIngo Molnar2008-04-171-2/+7
| | | | | | | | | | | | | | | | un-revert: commit 4960c9df1407c2723459c60ff13e6efe0c209c62 Author: Thomas Gleixner <tglx@linutronix.de> Date: Tue Jan 22 10:23:01 2008 +0100 Revert "x86: fix NMI watchdog & 'stopped time' problem" This reverts commit d4d25deca49ec2527a634557bf5a6cf449f85deb. needs a proper fix though ... Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: Explicitly include required header files.Robert P. J. Day2008-04-171-0/+1
| | | | | | | | After an experimental cleanup of <linux/percpu.h>, these files were exposed as invoking kmalloc() without including <linux/slab.h>. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: call check_nmi_watchdog explicitly in native_smp_cpus_doneGlauber de Oliveira Costa2008-04-171-2/+0
| | | | | | | With this, remove its late_initcall marker from nmi_32.c Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: unify nmi_32.h and nmi_64.hGlauber de Oliveira Costa2008-04-171-1/+1
| | | | | | | | Two more files goes away. nmi_64.h and nmi_32.h gives birth to nmi.h Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: fix compile warning building without CONFIG_SYSCTLLi Zefan2008-02-191-12/+9
| | | | | | | | | | arch/x86/kernel/nmi_64.c:50: warning: 'unknown_nmi_panic_callback' declared 'static' but never defined This patch also fixes nmi_32.c Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: clean up nmi_32/64.cHiroshi Shimamoto2008-01-301-6/+8
| | | | | | | | | | | | | clean up and make nmi_32/64.c more similar. - white space and coding style clean up. - nmi_cpu_busy is available on CONFIG_SMP. - move functions __acpi_nmi_enable, acpi_nmi_enable, __acpi_nmi_disable and acpi_nmi_disable. - make variables name more similar. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Driver core: change sysdev classes to use dynamic kobject namesKay Sievers2008-01-251-1/+1
| | | | | | | | | | All kobjects require a dynamically allocated name now. We no longer need to keep track if the name is statically assigned, we can just unconditionally free() all kobject names on cleanup. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Revert "x86: fix NMI watchdog & 'stopped time' problem"Thomas Gleixner2008-01-221-7/+2
| | | | | | | | | | | | | | | | This reverts commit d4d25deca49ec2527a634557bf5a6cf449f85deb. It tried to fix long standing bugzilla entries, but the solution was reported to break other systems. The reporter of http://bugzilla.kernel.org/show_bug.cgi?id=9791 tracked it down to this commit and confirmed that reverting the patch restores the correct behaviour. It's too late in the release cycle to find a better solution than reverting the commit to avoid regressions. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu>
* x86: add the word 'WARNING' in check_nmi_watchdog() outputDon Zickus2007-12-041-1/+2
| | | | | | | | | | | | | | Our automated test suite looks for keywords like error, fail, warning in the boot log. In the case when the nmi watchdog is determined to be stuck in check_nmi_watchdog(), none of those keywords are displayed. This patch adds a keyword, "WARNING:", so it makes it easier to notice when the nmi watchdog isn't working correctly. Also add a proper KERN_WARNING mark to this printout. Signed-off-by: Don Zickus <dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: fix NMI watchdog & 'stopped time' problemMaciej W. Rozycki2007-11-261-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | More than 3 years ago Niclas Gustafsson reported a 'stopped time' problem: > Watching the /proc/interrupts with 10s apart after the "stop". > > [root@s151 root]# more /proc/interrupts > CPU0 > 0: 66413955 local-APIC-edge timer [...] > LOC: 67355837 > ERR: 0 > MIS: 0 > [root@s151 root]# more /proc/interrupts > CPU0 > 0: 66413955 local-APIC-edge timer [...] > LOC: 67379568 > ERR: 0 > MIS: 0 This may be because buggy SMM firmware messes with the 8259A (configured for a transparent mode -- yes that rare "local-APIC-edge" mode is tricky ;-) ) insanely. this should resolve: http://bugzilla.kernel.org/show_bug.cgi?id=2544 http://bugzilla.kernel.org/show_bug.cgi?id=6296 Patch-dusted-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: make nmi_cpu_busy() always definedIngo Molnar2007-11-091-2/+2
| | | | | | | | nmi_cpu_busy() must be available on !SMP too. this is in preparation to a smp_call_function_mask() fix. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Delete filenames in comments.Dave Jones2007-10-131-2/+0
| | | | | | | | | | | | | | | Since the x86 merge, lots of files that referenced their own filenames are no longer correct. Rather than keep them up to date, just delete them, as they add no real value. Additionally: - fix up comment formatting in scx200_32.c - Remove a credit from myself in setup_64.c from a time when we had no SCM - remove longwinded history from tsc_32.c which can be figured out from git. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86: Fix irq0 / local apic timer accountingThomas Gleixner2007-10-121-1/+2
| | | | | | | | | | | | | | | | | | | | | | The clock events merge introduced a change to the nmi watchdog code to handle the not longer increasing local apic timer count in the broadcast mode. This is fine for UP, but on SMP it pampers over a stuck CPU which is not handling the broadcast interrupt due to the unconditional sum up of local apic timer count and irq0 count. To cover all cases we need to keep track on which CPU irq0 is handled. In theory this is CPU#0 due to the explicit disabling of irq balancing for irq0, but there are systems which ignore this on the hardware level. The per cpu irq0 accounting allows us to remove the irq0 to CPU0 binding as well. Add a per cpu counter for irq0 and evaluate this instead of the global irq0 count in the nmi watchdog code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
* i386: move kernelThomas Gleixner2007-10-111-0/+468
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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