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We're already checking whether old and new meta do not overlap in ring buffer (as we need to keep both old and new meta during vg_write up until vg_commit). We also need to check whether the new metadata do not overlap themselves in case we don't have old metadata yet (...because we're in vgcreate). This could happen if we're creating a VG so that the very first metadata written are long enough that it wraps themselves in metadata ring buffer. Although we limited the minimum metadata area size better with the previous commit ccb8da404d00288b7d49c7a28006ec5d4687bb55 which makes the initial VG metadata overlap in ring buffer to be less probable, the risk of hitting this overlap condition is still there if we still manage to generate big enough metadata somehow. For example, users can provide many and/or long VG tags during vgcreate so that the VG metadata is long enough to start to wrap in the ring buffer again...
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/ The source code is stored in git: http://git.fedorahosted.org/git/lvm2.git git clone git://git.fedorahosted.org/git/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 The source code repository used until 7th June 2012 is accessible here: http://sources.redhat.com/cgi-bin/cvsweb.cgi/LVM2/?cvsroot=lvm2.