kgdb, x86: Avoid invoking kgdb_nmicallback twice per NMI

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Stress-testing KVM's latest NMI support with kgdbts inside an SMP guest,
I came across spurious unhandled NMIs while running the singlestep test.
Looking closer at the code path each NMI takes when KGDB is enabled, I
noticed that kgdb_nmicallback is called twice per event: One time via
DIE_NMI_IPI notification, the second time on DIE_NMI. Removing the first
invocation cures the unhandled NMIs here.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

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Jan Kiszka 2008-10-06 13:50:59 -05:00 • committed by Jason Wessel

parent fec6ed1d1f

commit e85ceae910

1 changed files with 1 additions and 6 deletions

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arch/x86/kernel/kgdb.c

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