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Created attachment 504467 [details] vdsm log Description of problem: on qcow scenario, when actual size is consumed, and high water mark is reached, lvexetend message is sent to SPM, in my case, I see duplicate messages which are not answered; write_locks=1 wait_for_locks=1 } backup { retain_min = 50 retain_days = 0 } " --autobackup n --size 7168m 0959db5e-eb92-4b10-a476-2b983036eeb2/252b16f3-34e6-4fe1-82f4-c8f727e8d02c' (cwd None) write_locks=1 wait_for_locks=1 } backup { retain_min = 50 retain_days = 0 } " --autobackup n --size 7168m 0959db5e-eb92-4b10-a476-2b983036eeb2/252b16f3-34e6-4fe1-82f4-c8f727e8d02c' (cwd None) write_locks=1 wait_for_locks=1 } backup { retain_min = 50 retain_days = 0 } " --autobackup n --size 7168m 0959db5e-eb92-4b10-a476-2b983036eeb2/252b16f3-34e6-4fe1-82f4-c8f727e8d02c' (cwd None) write_locks=1 wait_for_locks=1 } backup { retain_min = 50 retain_days = 0 } " --autobackup n --size 7168m 0959db5e-eb92-4b10-a476-2b983036eeb2/252b16f3-34e6-4fe1-82f4-c8f727e8d02c' (cwd None) write_locks=1 wait_for_locks=1 } backup { retain_min = 50 retain_days = 0 } " --autobackup n --size 7168m 0959db5e-eb92-4b10-a476-2b983036eeb2/252b16f3-34e6-4fe1-82f4-c8f727e8d02c' (cwd None) this is NOT high priority issue as eventually SPM handles lvextend request. repro steps: 1) VIRT-IO disk, actual size (lv size 1G), allocated size 20G (virtual) 2) dd disk till its full - grep lvextend on spm. vdsm-4.9-74.el6.x86_64 qemu-kvm-0.12.1.2-2.164.el6.x86_64 libvirt-0.9.1-1.el6.x86_64 regression - not sure.
It's interesting to understand if this is just an effect of the qemu bug, but with no functional effects, this has nothing to do in rhel-6.2.0.
Closing old bugs. If this issue is still relevant/important in current version, please re-open the bug.