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Jonathan Earl Brassow 6d0aa801a0 Fix for bug 733114. 
When an image is split from a 2-way mirror, the original mirror is converted to
a linear device.  To do this, the top "layer" must be removed.  The segments
are transferred from the sub-lv to the top-level LV and the link is severed.
The former sub-lv - having its segments transferred - now contains a temporary
error target.

When the original LV is resumed, the old sub-lv that now contains an error
segment is activated and scanned.  This is what causes the I/O error messages.
There are three ways to fix this problem:

1) Do not set the sub-lv which contains the error target as "visible" before
suspending the original LV.  This way, when the original is resumed, the sub-lv
device node is not created and it is not scanned - avoiding the error messages.
 The problem with this approach is that if the machine crashes after the
resume, it leaves the *hidden* LV in place and the user has a more difficult
time noticing that it needs to be cleaned up.  Thus, this type of processing is
frowned upon.

2) Do like _remove_mirror_images does and suspend the original, then suspend
the sub-lv (the error target), then resume the sub-lv, and finally resume the
original LV.  This seems like extra pointless operations to me, but it does not
produce the error message (although, I'm not sure why) and it allows us to
leave the visible flag in place.

3) Flag the sub-lv (error target) with a "do not scan" flag.  This seems like
the cleanest approach, but I have been unable to find the method for doing
this.  LVs get tagged in such a way by _get_udev_flags, but in this case the
resume of the original LV also resumes the error target LV without running it
through _get_udev_flags (likely because they are no longer linked).  Could
there be something wrong in resume_lv?

Option #2 was chosen to fix this bug, but it seems like more of a workaround
for now.
2011-09-13 13:59:19 +00:00
autoconf Using Fedora 14's autoreconf. 2011-01-07 14:38:34 +00:00
daemons Detect sscanf recovering_region input error 2011-09-06 18:24:27 +00:00
doc more pre-release fixes 2011-08-12 02:16:46 +00:00
include Refactor the percent (mirror sync, snapshot usage) handling code to use 2010-11-30 11:53:31 +00:00
lib Fix for bug 733114. 2011-09-13 13:59:19 +00:00
libdm Remove unused passed parameters 2011-09-07 08:37:48 +00:00
liblvm Replace free_vg with release_vg 2011-08-10 20:25:29 +00:00
man Append z to lv_attr if new blocks will be zeroed. 2011-09-09 01:15:18 +00:00
old-tests Move tests from old-tests/regex to unit-tests/regex. unit-tests will 2010-07-20 15:18:57 +00:00
po INSTALL rules updates 2010-04-09 21:42:48 +00:00
report-generators add copyright notices to new files 2010-07-28 12:20:38 +00:00
reports [REPORT-GENERATORS] cut down stylsheet.css to what we actually use 2010-07-21 10:00:38 +00:00
scripts reorder some status flag printing in gdbinit file. 2011-09-13 13:57:02 +00:00
test Updated testing script 2011-09-09 13:19:19 +00:00
tools lvcreate/remove thin_pool and thin volumes (--driverloaded n only) 2011-09-08 16:41:18 +00:00
udev Update udev rules to skip DM flags decoding for removed devices 2011-08-11 17:55:29 +00:00
unit-tests [MM] Make valgrind aware of the pool allocators 2010-08-09 10:56:01 +00:00
aclocal.m4 Add aclocal.m4 (for pkgconfig). 2011-01-07 16:27:05 +00:00
configure Autoreconf for lvmetad patch 2011-08-31 11:39:32 +00:00
configure.in A compromise integration of LVMetaD into the build: I have kept all the 2011-08-31 11:31:57 +00:00
COPYING Outline docs 2001-12-31 16:12:40 +00:00
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 core removed with clean not distclean 2011-08-12 12:56:38 +00:00
Makefile.in pre-release fixes incl make distclean and configure --with-raid=none/shared 2011-08-11 19:18:17 +00:00
README quick review of docs 2008-11-04 17:49:22 +00:00
VERSION post-release 2011-08-19 19:42:39 +00:00
VERSION_DM post-release 2011-08-19 19:42:39 +00:00
WHATS_NEW Fix for bug 733114. 2011-09-13 13:59:19 +00:00
WHATS_NEW_DM Remove unused passed parameters 2011-09-07 08:37:48 +00:00

README 

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

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://sources.redhat.com/pub/lvm2/

To access the CVS tree use:
  cvs -d :pserver:cvs@sources.redhat.com:/cvs/lvm2 login
  CVS password: cvs
  cvs -d :pserver:cvs@sources.redhat.com:/cvs/lvm2 co LVM2

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

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

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