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Andreas Gruenbacher 71921ef859 gfs2: Fix loop in gfs2_rbm_find (v2) 
Fix the resource group wrap-around logic in gfs2_rbm_find that commit
e579ed4f44 broke.  The bug can lead to unnecessary repeated scanning of the
same bitmaps; there is a risk that future changes will turn this into an
endless loop.

This is an updated version of commit 2d29f6b96d ("gfs2: Fix loop in
gfs2_rbm_find") which ended up being reverted because it introduced a
performance regression in iozone (see commit e74c98ca2d).  Changes since v1:

 - Simplify the wrap-around logic.

 - Handle the case where each resource group only has a single bitmap block
   (small filesystem).

 - Update rd_extfail_pt whenever we scan the entire bitmap, even when we don't
   start the scan at the very beginning of the bitmap.

Fixes: e579ed4f44 ("GFS2: Introduce rbm field bii")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
 		2019-05-07 22:33:44 +02:00
Documentation Merge branch 'stable-fodder' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 11:17:26 -07:00
LICENSES LICENSES: Add GCC runtime library exception text 2019-01-16 14:54:15 -07:00
arch pidfd patches for v5.2-rc1 2019-05-07 12:30:24 -07:00
block bfq: update internal depth state when queue depth changes 2019-04-13 19:08:22 -06:00
certs kexec, KEYS: Make use of platform keyring for signature verify 2019-02-04 17:34:07 -05:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-05-06 20:15:06 -07:00
drivers Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
fs gfs2: Fix loop in gfs2_rbm_find (v2) 2019-05-07 22:33:44 +02:00
include pidfd patches for v5.2-rc1 2019-05-07 12:30:24 -07:00
init pidfd patches for v5.2-rc1 2019-05-07 12:30:24 -07:00
ipc mqueue: switch to ->free_inode() 2019-05-01 22:43:26 -04:00
kernel pidfd patches for v5.2-rc1 2019-05-07 12:30:24 -07:00
lib Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
mm Merge branch 'work.icache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 10:57:05 -07:00
net stream_open related patches for Linux 5.2 2019-05-07 12:15:13 -07:00
samples samples: show race-free pidfd metadata access 2019-05-07 14:31:04 +02:00
scripts compiler-based memory initialization 2019-05-07 12:44:49 -07:00
security compiler-based memory initialization 2019-05-07 12:44:49 -07:00
sound stream_open related patches for Linux 5.2 2019-05-07 12:15:13 -07:00
tools Minor updates to ktest.pl 2019-05-07 10:18:57 -07:00
usr user/Makefile: Fix typo and capitalization in comment section 2018-12-11 00:18:03 +09:00
virt arm64 updates for 5.2 2019-05-06 17:54:22 -07:00
.clang-format clang-format: Update with the latest for_each macro list 2019-04-12 12:49:54 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore kbuild: Add support for DT binding schema checks 2018-12-13 09:41:32 -06:00
.mailmap Update Nicolas Pitre's email address 2019-04-02 18:12:44 -10:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS Char/Misc driver patches for 5.1-rc1 2019-03-06 14:18:59 -08:00
Kbuild Kbuild updates for v5.1 2019-03-10 17:48:21 -07:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS hwmon updates for v5.2 2019-05-06 19:56:51 -07:00
Makefile compiler-based memory initialization 2019-05-07 12:44:49 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.

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.