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Message-Id: <20210316233326.10778-1-john.ogness@linutronix.de>
Date: Wed, 17 Mar 2021 00:33:23 +0100
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: [PATCH next v1 0/3] printk: remove safe buffers
Hello,
Here is v1 of a series to remove the safe buffers. They are no
longer needed because messages can be stored directly into the
log buffer from any context.
However, the safe buffers also provided a form of recursion
protection. For that reason, explicit recursion protection is
also implemented for this series.
This series falls in line with the printk-rework plan as
presented [0] at Linux Plumbers in Lisbon 2019.
This series is based on next-20210316.
John Ogness
[0] https://linuxplumbersconf.org/event/4/contributions/290/attachments/276/463/lpc2019_jogness_printk.pdf (slide 23)
John Ogness (3):
printk: track/limit recursion
printk: remove safe buffers
printk: convert @syslog_lock to spin_lock
arch/powerpc/kernel/traps.c | 1 -
arch/powerpc/kernel/watchdog.c | 5 -
include/linux/printk.h | 10 -
kernel/kexec_core.c | 1 -
kernel/panic.c | 3 -
kernel/printk/internal.h | 2 -
kernel/printk/printk.c | 171 +++++++++--------
kernel/printk/printk_safe.c | 332 +--------------------------------
lib/nmi_backtrace.c | 6 -
9 files changed, 100 insertions(+), 431 deletions(-)
--
2.20.1
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