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Diffstat (limited to 'kernel/panic.c')
-rw-r--r--kernel/panic.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index 535c96510a44..ca8cea1ef673 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -108,6 +108,7 @@ void panic(const char *fmt, ...)
long i, i_next = 0;
int state = 0;
int old_cpu, this_cpu;
+ bool _crash_kexec_post_notifiers = crash_kexec_post_notifiers;
/*
* Disable local interrupts. This will prevent panic_smp_self_stop
@@ -160,8 +161,10 @@ void panic(const char *fmt, ...)
*
* Bypass the panic_cpu check and call __crash_kexec directly.
*/
- if (!crash_kexec_post_notifiers)
+ if (!_crash_kexec_post_notifiers) {
+ printk_nmi_flush_on_panic();
__crash_kexec(NULL);
+ }
/*
* Note smp_send_stop is the usual smp shutdown function, which
@@ -176,6 +179,8 @@ void panic(const char *fmt, ...)
*/
atomic_notifier_call_chain(&panic_notifier_list, 0, buf);
+ /* Call flush even twice. It tries harder with a single online CPU */
+ printk_nmi_flush_on_panic();
kmsg_dump(KMSG_DUMP_PANIC);
/*
@@ -187,7 +192,7 @@ void panic(const char *fmt, ...)
*
* Bypass the panic_cpu check and call __crash_kexec directly.
*/
- if (crash_kexec_post_notifiers)
+ if (_crash_kexec_post_notifiers)
__crash_kexec(NULL);
bust_spinlocks(0);
@@ -567,13 +572,7 @@ EXPORT_SYMBOL(__stack_chk_fail);
core_param(panic, panic_timeout, int, 0644);
core_param(pause_on_oops, pause_on_oops, int, 0644);
core_param(panic_on_warn, panic_on_warn, int, 0644);
-
-static int __init setup_crash_kexec_post_notifiers(char *s)
-{
- crash_kexec_post_notifiers = true;
- return 0;
-}
-early_param("crash_kexec_post_notifiers", setup_crash_kexec_post_notifiers);
+core_param(crash_kexec_post_notifiers, crash_kexec_post_notifiers, bool, 0644);
static int __init oops_setup(char *s)
{