在 2020/11/24 3:52, Andrew Morton 写道:
On Mon, 23 Nov 2020 13:13:59 +0000 Xu Qiang <xuqian...@huawei.com> wrote:
when hardlockup_all_cpu_backtrace is on, and there are
a large number of cores in the system, it takes
a long time to output the hard deadlock logs of all cores
to the serial port. When the console_flush_on_panic function
in panic is executed, console_locked is still held.
As a result, garbled characters are displayed in the serial port log.
To solve this problem, wait for a maximum of 10s for the serial port
to be released before console_flush_on_panic.
Wouldn't it be better to wait until all the printing of all those
backtraces has completed?
.
The fear that there may be some unexpected abnormal situation,
resulting in the serial port has been occupied without release.
Thanks
Xu.
