RHBA-2013:0023 - Bug Fix Advisory

Topic

Updated lvm2 packages that fix four bugs are now available for Red Hat
Enterprise Linux 5.

Description

The lvm2 packages provide support for Logical Volume Management (LVM).

This update fixes the following bugs:

• Prior to this update, the --alloc option in the lvm2 man pages was

insufficiently documented. A more detailed specification of allocation policies
was needed. With this update, the description has been enhanced and provides a
more comprehensive insight into the allocation process. (BZ#770970)

• Previously, when the pv_min_size setting in the lvm.conf configuration file

(/etc/lvm/lvm.conf) was set to value smaller than the default value of 2048 KB,
the system ignored this configuration later on. Consequently, the lvm commands
returned the following warning when processing smaller physical volumes:

Ignoring too small pv_min_size 512KB, using default 2048KB.

This bug has been fixed, and user-set pv_min_size is no longer ignored in the
aforementioned case. (BZ#786009)

• Previously, when a physical volume (PV) with no physical extents (PE) was in a

volume group (VG), the vgcfgrestore command executed on the VG failed with the
following message:

Floating point exception

This behavior was caused by a division by zero error. With this update, a fix
has been introduced to avoid the aforementioned exception. As a result,
vgcfgrestore no longer fails in the described scenario. (BZ#820237)

• Previously, it was possible to use the lvcreate command with the --alloc cling

option to create a linear device that exceeded any single physical volume (PV)
within the volume group (VG). The lvcreate command placed the data across
multiple PVs, which was in conflict with the cling allocation policy. This bug
has been fixed and lvcreate now works in accordance with the selected allocation
policy. (BZ#821013)

All users of lvm2 are advised to upgrade to these updated packages, which fix
these bugs.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 770970 - lvm2 man page and documentation for "normal" Allocation Policy needs to be improved
• BZ - 786009 - Ignoring too small pv_min_size 512KB
• BZ - 820237 - vgcfgrestore fails with division by zero if metadata-only PV with no physical extents present in VG
• BZ - 821013 - cling allocation policy should never split data across PVs

CVEs

(none)

References

(none)