diff options
| author | Ryo Takakura <takakura@valinux.co.jp> | 2024-08-12 10:27:03 +0300 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2024-08-13 15:16:22 +0300 |
| commit | bcc954c6caba01fca143162d5fbb90e46aa1ad80 (patch) | |
| tree | 1753c205754918fdb84a270566df359ae6dc8cd5 /include/linux/panic.h | |
| parent | 8bf100092d60bf586bbc1a3a2cd833bb212d9d53 (diff) | |
| download | linux-bcc954c6caba01fca143162d5fbb90e46aa1ad80.tar.xz | |
printk/panic: Allow cpu backtraces to be written into ringbuffer during panic
commit 779dbc2e78d7 ("printk: Avoid non-panic CPUs writing
to ringbuffer") disabled non-panic CPUs to further write messages to
ringbuffer after panicked.
Since the commit, non-panicked CPU's are not allowed to write to
ring buffer after panicked and CPU backtrace which is triggered
after panicked to sample non-panicked CPUs' backtrace no longer
serves its function as it has nothing to print.
Fix the issue by allowing non-panicked CPUs to write into ringbuffer
while CPU backtrace is in flight.
Fixes: 779dbc2e78d7 ("printk: Avoid non-panic CPUs writing to ringbuffer")
Signed-off-by: Ryo Takakura <takakura@valinux.co.jp>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20240812072703.339690-1-takakura@valinux.co.jp
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'include/linux/panic.h')
| -rw-r--r-- | include/linux/panic.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/panic.h b/include/linux/panic.h index 3130e0b5116b..54d90b6c5f47 100644 --- a/include/linux/panic.h +++ b/include/linux/panic.h @@ -16,6 +16,7 @@ extern void oops_enter(void); extern void oops_exit(void); extern bool oops_may_print(void); +extern bool panic_triggering_all_cpu_backtrace; extern int panic_timeout; extern unsigned long panic_print; extern int panic_on_oops; |