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From: Petr Mladek <pmladek@suse.com>
To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Juri Lelli <juri.lelli@redhat.com>,
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Subject: Re: [PATCH 00/50] Add log level to show_stack()
Date: Fri, 8 Nov 2019 14:04:47 +0100
Message-ID: <20191108130447.h3wfgo4efjkto56f@pathway.suse.cz> (raw)
In-Reply-To: <20191108103719.GB175344@google.com>

On Fri 2019-11-08 19:37:19, Sergey Senozhatsky wrote:
> On (19/11/06 09:35), Petr Mladek wrote:
> > I agree with all the other justification.
> > 
> > I would add. The backtrace is really useful for debugging. It should
> > be possible to print it even in less critical situations.
> 
> Hmm, I don't know.
> Do we really need debug/info level backtraces?

debug is exactly the loglevel where registry content and backtrace
might be very useful. It is not always important to reach the console.


> May be all backtraces can be converted to something more severe
> (so we can stop playing games with loglvl) and then we can
> clean up "(ab)users"?

IMHO, we should distinguish warning, error, crit, alert, emerg
situations. Backtraces and any related messages should be
filtered the same way. Any information might be useless without
the context.

I agree that it is complicated to pass the loglevel as
a parameter. It would be better define the default
log level for a given code section. It might be stored
in task_struct for the normal context and in per-CPU
variables for interrupt contexts.

Best Regards,
Petr

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Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-06  3:04 Dmitry Safonov
2019-11-06  3:04 ` [PATCH 01/50] kallsyms/printk: Add loglvl to print_ip_sym() Dmitry Safonov
2019-11-06  4:38   ` Sergey Senozhatsky
2019-11-06 16:39     ` Dmitry Safonov
2019-11-13 15:49   ` Steven Rostedt
2019-11-06  3:05 ` [PATCH 27/50] riscv: Add show_stack_loglvl() Dmitry Safonov
2019-11-06  8:35 ` [PATCH 00/50] Add log level to show_stack() Petr Mladek
2019-11-06 16:12   ` Dmitry Safonov
2019-11-08 10:37   ` Sergey Senozhatsky
2019-11-08 13:04     ` Petr Mladek [this message]
2019-11-11  1:23       ` Sergey Senozhatsky
2019-11-11  9:12         ` Petr Mladek
2019-11-12  4:44           ` Sergey Senozhatsky
2019-11-12  4:57             ` Sergey Senozhatsky
2019-11-12  8:35               ` Petr Mladek
2019-11-12 10:12                 ` Sergey Senozhatsky
2019-11-13  1:23                   ` Sergey Senozhatsky
2019-11-13  2:25                     ` Dmitry Safonov
2019-11-13  6:33                       ` Sergey Senozhatsky
2019-11-13  8:47                         ` Petr Mladek
2019-11-13 16:24                           ` Steven Rostedt
2019-11-13 16:40                         ` Dmitry Safonov
2019-11-15  0:50                           ` Sergey Senozhatsky
2019-11-13 15:32             ` Steven Rostedt
2019-11-11 19:47         ` Dmitry Safonov
2019-11-12  2:17           ` Sergey Senozhatsky
2019-11-12  2:40             ` Dmitry Safonov
2019-11-12  4:25               ` Sergey Senozhatsky
2019-11-13  2:41                 ` Dmitry Safonov
2019-11-13  2:51                   ` Sergey Senozhatsky
2019-11-13 15:39             ` Steven Rostedt
2019-11-15  3:36               ` Sergey Senozhatsky
2019-11-06  9:20 ` Peter Zijlstra
2019-11-06 16:27   ` Dmitry Safonov
2019-11-06 20:34     ` Peter Zijlstra
2019-11-06 23:25       ` Russell King - ARM Linux admin
2019-11-13 15:44         ` Steven Rostedt
2019-11-08 16:28       ` Dmitry Safonov
2019-11-08 17:30         ` Russell King - ARM Linux admin
2019-11-08 21:08           ` Dmitry Safonov
2019-11-13 15:41       ` Steven Rostedt

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