linux-kernel - Re: [PATCHv3 01/50] kallsyms/printk: Add loglvl to print_ip

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Date:   Mon, 20 Apr 2020 10:28:17 -0700
From:   Joe Perches <joe@...ches.com>
To:     Dmitry Safonov <dima@...sta.com>, linux-kernel@...r.kernel.org
Cc:     Dmitry Safonov <0x7f454c46@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>, Jiri Slaby <jslaby@...e.com>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Albert Ou <aou@...s.berkeley.edu>,
        Ben Segall <bsegall@...gle.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Greentime Hu <green.hu@...il.com>,
        Ingo Molnar <mingo@...hat.com>,
        James Hogan <jhogan@...nel.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Mel Gorman <mgorman@...e.de>, Michal Simek <monstr@...str.eu>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Burton <paulburton@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincent Chen <deanbo422@...il.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Will Deacon <will@...nel.org>, linux-mips@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCHv3 01/50] kallsyms/printk: Add loglvl to print_ip_sym()

On Mon, 2020-04-20 at 18:25 +0100, Dmitry Safonov wrote:
> Hi Joe,

Hi Dmitry.

> On 4/18/20 9:40 PM, Joe Perches wrote:
> > On Sat, 2020-04-18 at 21:18 +0100, Dmitry Safonov wrote:
> > > print_ip_sym() needs to have a log level parameter to comply with other
> > > parts being printed. Otherwise, half of the expected backtrace would be
> > > printed and other may be missing with some logging level.
> > 
> > I'd rather create another extension to %ps that also emits
> > the [<address>] along with the symbol lookup and retire
> > print_ip_sym altogether.
> 
> Makes sense.
> Would you mind if I'll do it on the top of these patches?
> [not to mix new printk-format with patches those add loglvl parameter]

Of course not, but the proposal below doesn't compile
and I've been playing with a slightly different
implementation.

I'll post it in a few days.