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Filename Latest commit message Latest commit date
Tetsuo Handa cbae05d32f printk: Pass caller information to log_store().
When thread1 called printk() which did not end with '\n', and then thread2
called printk() which ends with '\n' before thread1 calls pr_cont(), the
partial content saved into "struct cont" is flushed by thread2 despite the
partial content was generated by thread1. This leads to confusing output
as if the partial content was generated by thread2. Fix this problem by
passing correct caller information to log_store().

Before:

  [ T8533] abcdefghijklm
  [ T8533] ABCDEFGHIJKLMNOPQRSTUVWXYZ
  [ T8532] nopqrstuvwxyz
  [ T8532] abcdefghijklmnopqrstuvwxyz
  [ T8533] abcdefghijklm
  [ T8533] ABCDEFGHIJKLMNOPQRSTUVWXYZ
  [ T8532] nopqrstuvwxyz

After:

  [ T8507] abcdefghijklm
  [ T8508] ABCDEFGHIJKLMNOPQRSTUVWXYZ
  [ T8507] nopqrstuvwxyz
  [ T8507] abcdefghijklmnopqrstuvwxyz
  [ T8507] abcdefghijklm
  [ T8508] ABCDEFGHIJKLMNOPQRSTUVWXYZ
  [ T8507] nopqrstuvwxyz

Link: http://lkml.kernel.org/r/1550314773-8607-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
To: Dmitry Vyukov <dvyukov@google.com>
To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
[pmladek: broke 80-column rule where it made more harm than good]
Signed-off-by: Petr Mladek <pmladek@suse.com>
2019-02-21 10:41:15 +01:00
arch
block
certs
crypto
Documentation Printk changes for 4.20 2018-10-25 17:11:52 -07:00
drivers
firmware
fs
include printk: Make printk_emit() local function. 2018-11-29 10:59:40 +01:00
init
ipc
kernel printk: Pass caller information to log_store(). 2019-02-21 10:41:15 +01:00
lib printk: Add caller information to printk() output. 2018-12-18 10:53:14 +01:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.