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authorDon Zickus <dzickus@redhat.com>2011-10-13 15:14:27 -0400
committerIngo Molnar <mingo@elte.hu>2011-12-05 06:00:23 -0500
commitbda62633983f9db49ce0b1a9235b3709c1cda5f0 (patch)
treea19384bfa63d4341ee28776ed7554444495ffbb2 /Documentation
parent99e8b9ca90d688c3ac7d3a141b701c9694a93925 (diff)
x86, NMI: Add knob to disable using NMI IPIs to stop cpus
Some machines may exhibit problems using the NMI to stop other cpus. This knob just allows one to revert back to the original behaviour to help diagnose the problem. V2: make function static Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <robert.richter@amd.com> Cc: seiji.aguchi@hds.com Cc: vgoyal@redhat.com Cc: mjg@redhat.com Cc: tony.luck@intel.com Cc: gong.chen@intel.com Cc: satoru.moriya@hds.com Cc: avi@redhat.com Cc: Andi Kleen <andi@firstfloor.org> Link: http://lkml.kernel.org/r/1318533267-18880-4-git-send-email-dzickus@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a0c5c5f4fce6..b4339e5a50da 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1796,6 +1796,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
1796 nomfgpt [X86-32] Disable Multi-Function General Purpose 1796 nomfgpt [X86-32] Disable Multi-Function General Purpose
1797 Timer usage (for AMD Geode machines). 1797 Timer usage (for AMD Geode machines).
1798 1798
1799 nonmi_ipi [X86] Disable using NMI IPIs during panic/reboot to
1800 shutdown the other cpus. Instead use the REBOOT_VECTOR
1801 irq.
1802
1799 nopat [X86] Disable PAT (page attribute table extension of 1803 nopat [X86] Disable PAT (page attribute table extension of
1800 pagetables) support. 1804 pagetables) support.
1801 1805