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Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index ef1ba922dc60..51b66c168b1d 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4815,6 +4815,21 @@ Kernel parameters panic_on_warn=1 panic() instead of WARN(). Useful to cause kdump on a WARN(). + panic_force_cpu= + [KNL,SMP] Force panic handling to execute on a specific CPU. + Format: <cpu number> + Some platforms require panic handling to occur on a + specific CPU for the crash kernel to function correctly. + This can be due to firmware limitations, interrupt routing + constraints, or platform-specific requirements where only + a particular CPU can safely enter the crash kernel. + When set, panic() will redirect execution to the specified + CPU before proceeding with the normal panic and kexec flow. + If the target CPU is offline or unavailable, panic proceeds + on the current CPU. + This option should only be used for systems with the above + constraints as it might cause the panic operation to be less reliable. + panic_print= Bitmask for printing system info when panic happens. User can chose combination of the following bits: bit 0: print all tasks info @@ -6989,12 +7004,12 @@ Kernel parameters softlockup_panic= [KNL] Should the soft-lockup detector generate panics. - Format: 0 | 1 + Format: <int> - A value of 1 instructs the soft-lockup detector - to panic the machine when a soft-lockup occurs. It is - also controlled by the kernel.softlockup_panic sysctl - and CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC, which is the + A value of non-zero instructs the soft-lockup detector + to panic the machine when a soft-lockup duration exceeds + N thresholds. It is also controlled by the kernel.softlockup_panic + sysctl and CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC, which is the respective build-time switch to that functionality. softlockup_all_cpu_backtrace= |