Re: [PATCH v2 4/4] panic: avoid duplicate all CPU backtraces from sys_info
From: Feng Tang <hidden>
Date: 2026-06-24 02:50:43
Also in:
lkml, stable
On Tue, Jun 23, 2026 at 03:35:01PM +0000, Bradley Morgan wrote:
panic_other_cpus_shutdown() handles SYS_INFO_ALL_BT before stopping the other CPUs. Do not ask sys_info() to handle that bit again later in the panic path. Use sys_info_without_all_bt() so panic_print=all_bt does not request more output after the CPUs are stopped.
Good catch! Thanks! Later in panic_other_cpus_shutdown(), it sends IPIs to stop other CPUs, and this patch does avoid dumping local call trace again! For the whole serie, feel free to add: Reviewed-by: Feng Tang <redacted> Thanks, Feng
quoted hunk ↗ jump to hunk
Fixes: b76e89e50fc3 ("panic: generalize panic_print's function to show sys info") Cc: stable@vger.kernel.org Signed-off-by: Bradley Morgan <redacted> --- Changes since v1: - New patch using the same helper for panic. kernel/panic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/kernel/panic.c b/kernel/panic.c index d030f88ad4ef..2cf229c7c0cf 100644 --- a/kernel/panic.c +++ b/kernel/panic.c@@ -683,7 +683,7 @@ void vpanic(const char *fmt, va_list args) */ atomic_notifier_call_chain(&panic_notifier_list, 0, buf); - sys_info(panic_print); + sys_info_without_all_bt(panic_print); kmsg_dump_desc(KMSG_DUMP_PANIC, buf);-- 2.53.0