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Before commit c1f246fedfc349c25749da501e68a7f70bd122b0, _get_all_devices() did a full device scan before get_vgnameids() was called. The full scan in _get_all_devices() is from calling dev_iter_create(f, 1). The '1' arg forces a full scan. By doing a full scan in _get_all_devices(), new devices were added to dev-cache before get_vgnameids() began scanning labels. So, labels would be read from new devices. (e.g. by the first 'pvs' command after the new device appeared.) After that commit, _get_all_devices() was called after get_vgnameids() was finished scanning labels. So, new devices would be missed while scanning labels. When _get_all_devices() saw the new devices (after labels were scanned), those devices were added to the .cache file. This meant that the second 'pvs' command would see the devices because they would be in .cache. Now, the full device scan is factored out of _get_all_devices() and called by itself at the start of the command so that new devices will be known before get_vgnameids() scans labels.
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.