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Message-ID: <87o8f26lid.fsf@jogness.linutronix.de>
Date: Mon, 29 Mar 2021 17:13:30 +0200
From: John Ogness <john.ogness@...utronix.de>
To: Petr Mladek <pmladek@...e.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Gleixner <tglx@...utronix.de>,
linux-kernel@...r.kernel.org,
Michael Ellerman <mpe@...erman.id.au>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Eric Biederman <ebiederm@...ssion.com>,
Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Alistair Popple <alistair@...ple.id.au>,
Jordan Niethe <jniethe5@...il.com>,
Peter Zijlstra <peterz@...radead.org>,
Cédric Le Goater <clg@...d.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Kees Cook <keescook@...omium.org>, Yue Hu <huyue2@...ong.com>,
Alexey Kardashevskiy <aik@...abs.ru>,
Rafael Aquini <aquini@...hat.com>,
Tiezhu Yang <yangtiezhu@...ngson.cn>,
"Guilherme G. Piccoli" <gpiccoli@...onical.com>,
"Paul E. McKenney" <paulmck@...nel.org>,
linuxppc-dev@...ts.ozlabs.org, kexec@...ts.infradead.org
Subject: Re: [PATCH next v1 2/3] printk: remove safe buffers
On 2021-03-29, John Ogness <john.ogness@...utronix.de> wrote:
>> Will you call console write() callback with irq enabled from the
>> kthread?
>
> No. That defeats the fundamental purpose of this entire rework
> excercise. ;-)
Sorry, I misread your question. The answer is "yes". We want to avoid a
local_irq_save() when calling into console->write().
John Ogness
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