How many snapshots active at once ? I guess this is a kcopyd scalability issue which needs addressing. Regards, Heinz -- The LVM Guy -- On Tue, Jun 20, 2006 at 10:54:05AM +1000, CaT wrote: > On Mon, Jun 19, 2006 at 12:00:40PM +1000, CaT wrote: > > I am attempting to create multiple snapshots of an lv ontop of a raid-5 > > software raid device and ext3+dir_index and resize_inode for the fs. > > The kernel is a pure 64bit compile with Debian Sarge amd64 running on > > top of it. The kernel is monolithic and I'm using lvm2 2.01.03-5 with > > devmapper 1.01. > > > > This works under 2.6.15.7. Under 2.6.16.20 I get this: > > 2.6.17 also fails. > > More info: The failing kernels can deal with multiple pre-created > snapshots but the moment I try to create one it freezes as below. Mounting > another snapshotted volume at the time this is frozen freezes mount. > > After reboot the snapshot it froze on making is available to the system > (though the reboot fails on shutdown as it cannot unmount anything). > > > # lvcreate --snapshot --size 50G --name snap-13 --permission r --verbose /dev/backups/main > > Setting chunksize to 16 sectors. > > Finding volume group "backups" > > Creating logical volume snap-13 > > Archiving volume group "backups" metadata. > > Creating volume group backup "/etc/lvm/backup/backups" > > Found volume group "backups" > > Loading backups-snap--13 > > Zeroing start of logical volume "snap-13" > > Found volume group "backups" > > Removing backups-snap--13 > > Found volume group "backups" > > Found volume group "backups" > > Found volume group "backups" > > Loading backups-main-real > > Loading backups-snap--12-cow > > Loading backups-snap--12 > > *freeze* > > -- > "To the extent that we overreact, we proffer the terrorists the > greatest tribute." > - High Court Judge Michael Kirby > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Red Hat GmbH Consulting Development Engineer Am Sonnenhang 11 Storage Development 56242 Marienrachdorf Germany Mauelshagen@xxxxxxxxxx PHONE +49 171 7803392 FAX +49 2626 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
