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authorPaul E. McKenney <paulmck@kernel.org>2022-12-17 00:57:51 +0100
committerPaul E. McKenney <paulmck@kernel.org>2023-01-20 00:54:41 +0100
commit1a3ea611fc105759cf1023e922d00cf44569b8bb (patch)
tree4fef9a5d7ac343ee3c521a9abd6ebdf2ab40fa2d /lib/nmi_backtrace.c
parentLinux 6.2-rc1 (diff)
downloadlinux-1a3ea611fc105759cf1023e922d00cf44569b8bb.tar.xz
linux-1a3ea611fc105759cf1023e922d00cf44569b8bb.zip
x86/nmi: Accumulate NMI-progress evidence in exc_nmi()
CPUs ignoring NMIs is often a sign of those CPUs going bad, but there are quite a few other reasons why a CPU might ignore NMIs. Therefore, accumulate evidence within exc_nmi() as to what might be preventing a given CPU from responding to an NMI. [ paulmck: Apply Peter Zijlstra feedback. ] Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <x86@kernel.org> Reviewed-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/nmi_backtrace.c')
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