diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2022-12-16 16:52:01 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-01-19 15:55:12 -0800 |
| commit | 344da544f177f919cf6919e5abcd388f27aa53db (patch) | |
| tree | 47fbf9344fd33a71023a235f45e219be672e421a /include/linux/nmi.h | |
| parent | 1a3ea611fc105759cf1023e922d00cf44569b8bb (diff) | |
x86/nmi: Print reasons why backtrace NMIs are ignored
Instrument nmi_trigger_cpumask_backtrace() to dump out diagnostics based
on evidence accumulated by exc_nmi(). These diagnostics are dumped for
CPUs that ignored an NMI backtrace request for more than 10 seconds.
[ paulmck: Apply Ingo Molnar 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 'include/linux/nmi.h')
| -rw-r--r-- | include/linux/nmi.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/nmi.h b/include/linux/nmi.h index f700ff2df074..048c0b9aa623 100644 --- a/include/linux/nmi.h +++ b/include/linux/nmi.h @@ -214,4 +214,12 @@ int proc_watchdog_cpumask(struct ctl_table *, int, void *, size_t *, loff_t *); #include <asm/nmi.h> #endif +#ifdef CONFIG_NMI_CHECK_CPU +void nmi_backtrace_stall_snap(const struct cpumask *btp); +void nmi_backtrace_stall_check(const struct cpumask *btp); +#else +static inline void nmi_backtrace_stall_snap(const struct cpumask *btp) {} +static inline void nmi_backtrace_stall_check(const struct cpumask *btp) {} +#endif + #endif |