Re: [PATCHv3 12/50] csky: Add show_stack_loglvl()

[Dmitry Safonov]

Hi Andrew,

On 5/15/20 8:23 PM, Andrew Morton wrote:
> On Sat, 18 Apr 2020 21:19:06 +0100 Dmitry Safonov <dima@xxxxxxxxxx> wrote:
> 
>> Currently, the log-level of show_stack() depends on a platform
>> realization. It creates situations where the headers are printed with
>> lower log level or higher than the stacktrace (depending on
>> a platform or user).
>>
>> Furthermore, it forces the logic decision from user to an architecture
>> side. In result, some users as sysrq/kdb/etc are doing tricks with
>> temporary rising console_loglevel while printing their messages.
>> And in result it not only may print unwanted messages from other CPUs,
>> but also omit printing at all in the unlucky case where the printk()
>> was deferred.
>>
>> Introducing log-level parameter and KERN_UNSUPPRESSED [1] seems
>> an easier approach than introducing more printk buffers.
>> Also, it will consolidate printings with headers.
>>
>> Introduce show_stack_loglvl(), that eventually will substitute
>> show_stack().
> 
> The csky code has changed a lot in linux-next due to 18c07d23da5a
> ("csky: Fixup calltrace panic").  I redid this patch as below.  Can we
> please review and test?

The result looks good to me, thanks for the rebase!

Thanks,
          Dmitry