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From: John Ogness <john.ogness@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
	Petr Mladek <pmladek@suse.com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andrea Parri <andrea.parri@amarulasolutions.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Subject: [RFC PATCH v2 0/2] printk: new ringbuffer implementation
Date: Fri,  7 Jun 2019 18:29:47 +0206
Message-ID: <20190607162349.18199-1-john.ogness@linutronix.de> (raw)

Hello,

This is a follow-up RFC on the work to reimplement much of
the core of printk. The original thread can be seen here[0].

One of the results of that thread was that the work needs to
be broken up into several pieces. A roadmap was laid out[1]
and this RFC is for the base component of the first piece:
a new ringbuffer implementation for printk.

This series does not touch any existing printk code. It is
only the ringbuffer implementation. I am particularly
interested in feedback relating to the design of the
ringbuffer and the use of memory barriers.

The series also includes a test module that performs some
heavy writer stress testing. I have successfully run these
tests on a 16-core ARM64 platform.

John Ogness

[0] https://lkml.kernel.org/r/20190212143003.48446-1-john.ogness@linutronix.de
[1] https://lkml.kernel.org/r/87y35hn6ih.fsf@linutronix.de

John Ogness (2):
  printk-rb: add a new printk ringbuffer implementation
  printk-rb: add test module

 Documentation/core-api/index.rst             |   1 +
 Documentation/core-api/printk-ringbuffer.rst | 104 +++
 include/linux/printk_ringbuffer.h            | 238 +++++++
 lib/Makefile                                 |   2 +
 lib/printk_ringbuffer.c                      | 924 +++++++++++++++++++++++++++
 lib/test_prb.c                               | 237 +++++++
 6 files changed, 1506 insertions(+)
 create mode 100644 Documentation/core-api/printk-ringbuffer.rst
 create mode 100644 include/linux/printk_ringbuffer.h
 create mode 100644 lib/printk_ringbuffer.c
 create mode 100644 lib/test_prb.c

-- 
2.11.0


             reply index

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-07 16:23 John Ogness [this message]
2019-06-07 16:23 ` [RFC PATCH v2 1/2] printk-rb: add a new printk " John Ogness
2019-06-18  4:51   ` Sergey Senozhatsky
2019-06-18 22:12     ` John Ogness
2019-06-25  6:45       ` Sergey Senozhatsky
2019-06-25  7:15         ` Sergey Senozhatsky
2019-06-25  8:44           ` John Ogness
2019-06-25  9:06             ` Petr Mladek
2019-06-25 10:03               ` Sergey Senozhatsky
2019-06-25 12:03                 ` John Ogness
2019-06-26  2:08                   ` Sergey Senozhatsky
2019-06-26  7:16                     ` John Ogness
2019-06-26  7:45                       ` Sergey Senozhatsky
2019-06-26  7:47                       ` Petr Mladek
2019-06-26  7:59                         ` Sergey Senozhatsky
2019-06-25  9:09             ` Sergey Senozhatsky
2019-06-18 11:12   ` Peter Zijlstra
2019-06-18 22:18     ` John Ogness
2019-06-18 11:22   ` Peter Zijlstra
2019-06-18 22:30     ` John Ogness
2019-06-19 10:46       ` Andrea Parri
2019-06-20 22:50         ` John Ogness
2019-06-21 12:16           ` Andrea Parri
2019-06-19 11:08       ` Peter Zijlstra
2019-06-18 11:47   ` Peter Zijlstra
2019-06-20 22:23     ` John Ogness
2019-06-26 22:40       ` Peter Zijlstra
2019-06-26 22:53         ` Peter Zijlstra
2019-06-28  9:50         ` John Ogness
2019-06-28 15:44           ` Peter Zijlstra
2019-06-28 16:07             ` Peter Zijlstra
2019-07-01 10:39             ` John Ogness
2019-07-01 14:10               ` Peter Zijlstra
2019-07-01 14:11               ` Peter Zijlstra
2019-06-29 21:05           ` Andrea Parri
2019-06-30  2:03             ` John Ogness
2019-06-30 14:08               ` Andrea Parri
2019-07-02 14:13                 ` John Ogness
2019-06-26 22:47       ` Peter Zijlstra
2019-06-21 14:05   ` Petr Mladek
2019-06-24  8:33     ` John Ogness
2019-06-24 14:09       ` Petr Mladek
2019-06-25 13:29         ` John Ogness
2019-06-26  8:29           ` Petr Mladek
2019-06-26  9:09             ` John Ogness
2019-06-26 21:16       ` Peter Zijlstra
2019-06-26 21:43         ` John Ogness
2019-06-27  8:28           ` Petr Mladek
2019-07-04 10:33     ` [PATCH POC] printk_ringbuffer: Alternative implementation of lockless printk ringbuffer Petr Mladek
2019-07-04 14:59       ` John Ogness
2019-07-08 15:23         ` Petr Mladek
2019-07-09  1:34           ` John Ogness
2019-07-09  9:06             ` Petr Mladek
2019-07-09 10:21               ` John Ogness
2019-07-09 11:58                 ` Petr Mladek
2019-08-14  3:46                   ` John Ogness
2019-06-24 13:55   ` [RFC PATCH v2 1/2] printk-rb: add a new printk ringbuffer implementation John Ogness
2019-06-25  8:55   ` Sergey Senozhatsky
2019-06-25  9:19     ` John Ogness
2019-06-07 16:23 ` [RFC PATCH v2 2/2] printk-rb: add test module John Ogness
2019-06-17 21:09 ` [RFC PATCH v2 0/2] printk: new ringbuffer implementation Thomas Gleixner
2019-06-18  7:15   ` Petr Mladek

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