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He Zhe e6fe3e5b7d printk: Give error on attempt to set log buffer length to over 2G
The current printk() is ready to handle log buffer size up to 2G.
Give an explicit error for users who want to use larger log buffer.

Also fix printk formatting to show the 2G as a positive number.

Link: http://lkml.kernel.org/r/20181008135916.gg4kkmoki5bgtco5@pathway.suse.cz
Cc: rostedt@goodmis.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: He Zhe <zhe.he@windriver.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
[pmladek: Fixed to the really safe limit 2GB.]
Signed-off-by: Petr Mladek <pmladek@suse.com>
2018-10-09 14:02:05 +02:00
arch Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel 2018-09-13 16:33:26 -10:00
block blk-cgroup: increase number of supported policies 2018-09-11 10:59:53 -06:00
certs
crypto
Documentation overlayfs fixes for 4.19-rc4 2018-09-13 19:21:40 -10:00
drivers for-linus-20180913 2018-09-13 19:16:11 -10:00
firmware
fs overlayfs fixes for 4.19-rc4 2018-09-13 19:21:40 -10:00
include overlayfs fixes for 4.19-rc4 2018-09-13 19:21:40 -10:00
init
ipc
kernel printk: Give error on attempt to set log buffer length to over 2G 2018-10-09 14:02:05 +02:00
lib
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mm overlayfs fixes for 4.19-rc4 2018-09-13 19:21:40 -10:00
net tipc: check return value of __tipc_dump_start() 2018-09-12 13:15:04 -07:00
samples
scripts Kbuild fixes for v4.19 2018-09-09 05:42:11 -07:00
security
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MAINTAINERS MAINTAINERS: Make Dennis the percpu tree maintainer 2018-09-13 12:16:36 -07:00
Makefile Linux 4.19-rc3 2018-09-09 17:26:43 -07:00
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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.