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David Teigland 904e1e3d26 Place the first PE at 1 MiB for all defaults
. When using default settings, this commit should change
  nothing.  The first PE continues to be placed at 1 MiB
  resulting in a metadata area size of 1020 KiB (for
  4K page sizes; slightly smaller for larger page sizes.)

. When default_data_alignment is disabled in lvm.conf,
  align pe_start at 1 MiB, based on a default metadata area
  size that adapts to the page size.  Previously, disabling
  this option would result in mda_size that was too small
  for common use, and produced a 64 KiB aligned pe_start.

. Customized pe_start and mda_size values continue to be
  set as before in lvm.conf and command line.

. Remove the configure option for setting default_data_alignment
  at build time.

. Improve alignment related option descriptions.

. Add section about alignment to pvcreate man page.

Previously, DEFAULT_PVMETADATASIZE was 255 sectors.
However, the fact that the config setting named
"default_data_alignment" has a default value of 1 (MiB)
meant that DEFAULT_PVMETADATASIZE was having no effect.

The metadata area size is the space between the start of
the metadata area (page size offset from the start of the
device) and the first PE (1 MiB by default due to
default_data_alignment 1.)  The result is a 1020 KiB metadata
area on machines with 4KiB page size (1024 KiB - 4 KiB),
and smaller on machines with larger page size.

If default_data_alignment was set to 0 (disabled), then
DEFAULT_PVMETADATASIZE 255 would take effect, and produce a
metadata area that was 188 KiB and pe_start of 192 KiB.
This was too small for common use.

This is fixed by making the default metadata area size a
computed value that matches the value produced by
default_data_alignment.
2018-11-26 16:36:50 -06:00
autoconf autoconf: Fix py-compile permissions 2016-02-18 01:05:05 +00:00
base cov: mark warning as expected one 2018-11-03 16:10:32 +01:00
conf build: make genrate config file 2018-10-11 11:06:23 +02:00
coverity coverity: model few more functions 2017-06-27 12:17:16 +02:00
daemons sanlock: update headers 2018-11-19 16:55:11 +01:00
device_mapper libdm: add memory barrier 2018-11-17 00:30:50 +01:00
doc Merge branch 'master' into 2018-05-11-fork-libdm 2018-06-01 13:04:12 +01:00
include Place the first PE at 1 MiB for all defaults 2018-11-26 16:36:50 -06:00
lib Place the first PE at 1 MiB for all defaults 2018-11-26 16:36:50 -06:00
libdaemon device_mapper: remove dbg_malloc. 2018-06-08 13:40:53 +01:00
libdm libdm: add memory barrier 2018-11-17 00:30:50 +01:00
man Place the first PE at 1 MiB for all defaults 2018-11-26 16:36:50 -06:00
nix lockd: Clean up spec 2015-07-04 14:36:57 +02:00
po doc: change fsf address 2016-01-21 12:11:37 +01:00
scripts blk_availability service drop lvmetad 2018-11-26 14:51:32 -06:00
spec spec: lvmdbusd requires python3 setuptools 2018-10-22 12:51:51 +02:00
test Place the first PE at 1 MiB for all defaults 2018-11-26 16:36:50 -06:00
tools Place the first PE at 1 MiB for all defaults 2018-11-26 16:36:50 -06:00
udev udev: keep systemd vars on change event in 69-dm-lvm-metad.rules for systemd reload 2018-04-17 11:38:12 +02:00
.gitignore gitignore 2018-05-23 16:53:18 +02:00
acinclude.m4 [build] uncomment 'serial 3' in an m4 file. 2018-04-30 09:44:27 +01:00
aclocal.m4 liblvm: remove lvmapi 2018-06-08 09:38:05 +01:00
configure configure: update 2018-11-08 12:22:07 +01:00
configure.ac Place the first PE at 1 MiB for all defaults 2018-11-26 16:36:50 -06:00
COPYING doc: change fsf address 2016-01-21 12:11:37 +01:00
COPYING.BSD Add BSD 2-Clause License 2018-07-27 17:09:46 +02:00
COPYING.LIB Fix inconsistent licence notices: executables are GPLv2; libraries LGPLv2.1. 2007-08-20 20:55:30 +00:00
INSTALL quick review of docs 2008-11-04 17:49:22 +00:00
make.tmpl.in build: add vdo configuration option --with-vdo= 2018-07-09 15:28:35 +02:00
Makefile.in Remove lvmetad 2018-07-11 11:26:42 -05:00
README pre-release 2018-10-10 11:26:53 +02:00
TESTING docs: Add TESTING file 2017-12-14 16:45:47 +01:00
VERSION post-release 2018-10-31 15:56:41 +01:00
VERSION_DM post-release 2018-10-31 15:56:41 +01:00
WHATS_NEW WHATS_NEW: sync io 2018-11-20 09:20:28 -06:00
WHATS_NEW_DM libdm: print params only for ioctls using them 2018-11-17 00:30:50 +01:00

This tree contains the LVM2 and device-mapper tools and libraries.

This is development branch, for stable 2.02 release see 2018-06-01-stable
branch.

For more information about LVM2 read the changelog in the WHATS_NEW file.
Installation instructions are in INSTALL.

There is no warranty - see COPYING and COPYING.LIB.

Tarballs are available from:
  ftp://sourceware.org/pub/lvm2/
  ftp://sources.redhat.com/pub/lvm2/
  https://github.com/lvmteam/lvm2/releases

The source code is stored in git:
  https://sourceware.org/git/?p=lvm2.git
  git clone git://sourceware.org/git/lvm2.git
mirrored to:
  https://github.com/lvmteam/lvm2
  git clone https://github.com/lvmteam/lvm2.git
  git clone git@github.com:lvmteam/lvm2.git

Mailing list for general discussion related to LVM2:
  linux-lvm@redhat.com
  Subscribe from https://www.redhat.com/mailman/listinfo/linux-lvm

Mailing lists for LVM2 development, patches and commits:
  lvm-devel@redhat.com
  Subscribe from https://www.redhat.com/mailman/listinfo/lvm-devel

  lvm2-commits@lists.fedorahosted.org (Read-only archive of commits)
  Subscribe from https://fedorahosted.org/mailman/listinfo/lvm2-commits

Mailing list for device-mapper development, including kernel patches
and multipath-tools:
  dm-devel@redhat.com
  Subscribe from https://www.redhat.com/mailman/listinfo/dm-devel

Website:
  https://sourceware.org/lvm2/

Report upstream bugs at:
  https://bugzilla.redhat.com/enter_bug.cgi?product=LVM%20and%20device-mapper
or open issues at:
  https://github.com/lvmteam/lvm2/issues

The source code repository used until 7th June 2012 is accessible here:
  http://sources.redhat.com/cgi-bin/cvsweb.cgi/LVM2/?cvsroot=lvm2.