From: John Ogness <john.ogness@linutronix.de>
To: Petr Mladek <pmladek@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrea Parri <parri.andrea@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] printk: replace ringbuffer
Date: Tue, 28 Jan 2020 17:25:46 +0106 [thread overview]
Message-ID: <20200128161948.8524-1-john.ogness@linutronix.de> (raw)
Hello,
After several RFC series [0][1][2][3][4], here is the first set of
patches to rework the printk subsystem. This first set of patches
only replace the existing ringbuffer implementation. No locking is
removed. No semantics/behavior of printk are changed.
The VMCOREINFO is updated, which will require changes to the
external crash [5] tool. I will be preparing a patch to add support
for the new VMCOREINFO.
This series is in line with the agreements [6] made at the meeting
during LPC2019 in Lisbon, with 1 exception: support for dictionaries
will _not_ be discontinued [7]. Dictionaries are stored in a separate
buffer so that they cannot interfere with the human-readable buffer.
John Ogness
[0] https://lkml.kernel.org/r/20190212143003.48446-1-john.ogness@linutronix.de
[1] https://lkml.kernel.org/r/20190607162349.18199-1-john.ogness@linutronix.de
[2] https://lkml.kernel.org/r/20190727013333.11260-1-john.ogness@linutronix.de
[3] https://lkml.kernel.org/r/20190807222634.1723-1-john.ogness@linutronix.de
[4] https://lkml.kernel.org/r/20191128015235.12940-1-john.ogness@linutronix.de
[5] https://github.com/crash-utility/crash
[6] https://lkml.kernel.org/r/87k1acz5rx.fsf@linutronix.de
[7] https://lkml.kernel.org/r/20191007120134.ciywr3wale4gxa6v@pathway.suse.cz
John Ogness (2):
printk: add lockless buffer
printk: use the lockless ringbuffer
include/linux/kmsg_dump.h | 2 -
kernel/printk/Makefile | 1 +
kernel/printk/printk.c | 836 +++++++++---------
kernel/printk/printk_ringbuffer.c | 1370 +++++++++++++++++++++++++++++
kernel/printk/printk_ringbuffer.h | 328 +++++++
5 files changed, 2114 insertions(+), 423 deletions(-)
create mode 100644 kernel/printk/printk_ringbuffer.c
create mode 100644 kernel/printk/printk_ringbuffer.h
--
2.20.1
next reply other threads:[~2020-01-28 16:20 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 16:19 John Ogness [this message]
2020-01-28 16:19 ` [PATCH 1/2] printk: add lockless buffer John Ogness
2020-01-29 3:53 ` Steven Rostedt
2020-02-21 11:54 ` more barriers: " Petr Mladek
2020-02-27 12:04 ` John Ogness
2020-03-04 15:08 ` Petr Mladek
2020-03-13 10:13 ` John Ogness
2020-02-21 12:05 ` misc nits " Petr Mladek
2020-03-02 10:38 ` John Ogness
2020-03-02 12:17 ` Joe Perches
2020-03-02 12:32 ` Petr Mladek
2020-03-02 13:43 ` John Ogness
2020-03-03 9:47 ` Petr Mladek
2020-03-03 15:42 ` John Ogness
2020-03-04 10:09 ` Petr Mladek
2020-03-04 9:40 ` Petr Mladek
2020-01-28 16:19 ` [PATCH 2/2] printk: use the lockless ringbuffer John Ogness
2020-02-13 9:07 ` Sergey Senozhatsky
2020-02-13 9:42 ` John Ogness
2020-02-13 11:59 ` Sergey Senozhatsky
2020-02-13 22:36 ` John Ogness
2020-02-14 1:41 ` Sergey Senozhatsky
2020-02-14 2:09 ` Sergey Senozhatsky
2020-02-14 9:48 ` John Ogness
2020-02-14 13:29 ` lijiang
2020-02-14 13:50 ` John Ogness
2020-02-15 4:15 ` lijiang
2020-02-17 15:40 ` crashdump: " Petr Mladek
2020-02-17 16:14 ` John Ogness
2020-02-17 14:41 ` misc details: " Petr Mladek
2020-02-25 20:11 ` John Ogness
2020-02-26 9:54 ` Petr Mladek
2020-02-05 4:25 ` [PATCH 0/2] printk: replace ringbuffer lijiang
2020-02-05 4:42 ` Sergey Senozhatsky
2020-02-05 4:48 ` Sergey Senozhatsky
2020-02-05 5:02 ` Sergey Senozhatsky
2020-02-05 5:38 ` lijiang
2020-02-05 6:36 ` Sergey Senozhatsky
2020-02-05 9:00 ` John Ogness
2020-02-05 9:28 ` Sergey Senozhatsky
2020-02-05 10:19 ` lijiang
2020-02-05 16:12 ` John Ogness
2020-02-06 9:12 ` lijiang
2020-02-13 13:07 ` Petr Mladek
2020-02-14 1:07 ` Sergey Senozhatsky
2020-02-05 11:07 ` Sergey Senozhatsky
2020-02-05 15:48 ` John Ogness
2020-02-05 19:29 ` Joe Perches
2020-02-06 6:31 ` Sergey Senozhatsky
2020-02-06 7:30 ` lijiang
2020-02-07 1:40 ` Steven Rostedt
2020-02-07 7:43 ` John Ogness
2020-02-14 15:56 ` Petr Mladek
2020-02-17 11:13 ` John Ogness
2020-02-17 14:50 ` Petr Mladek
2020-02-25 19:27 ` John Ogness
2020-02-05 9:36 ` lijiang
2020-02-06 9:21 ` lijiang
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