.sorry for the delay, I tried again to lvremove, find the strace enclosed. After the output "flock(3, LOCK_EX at the end, lvremove seems to go into an endless loop (100% CPU usage). Then I tried the following: kill -9 <pid of lvremove> rm /var/lock/lvm/V_vg00 to remove /var/lock/lvm/V_vg00 "by hand" and tried again. Now the system does not go to 100% CPU usage anymore, but lvremove does not terminate. See my second lvremove2.strace. As mentioned before, I simply wanted to get rid of a overflowed snapshot and clean up my volume group, as I should extend the LVM in question. How can I safely accomplish this in my situation? Thanks for your help and best regards --Marcel >>> Mikulas Patocka <mpatocka@redhat.com> 03.06.2008 21:15 >>> > Hi all > > I'm using lvm2-2.01.08-2.1 on fc4, kernel 2.6.16-1 with linux-vserver > patches. > > A while ago, I mistakenly created a 39GB read-write snapshot of my > /vservers partition (which, btw, seemed to work). But after some time > this partition got to an overflow and since then I can't get rid of it > anymore. See the lvdisplay output below. > > lvchange -an or --refresh gives me a message "Can't change snapshot > logical volume "vservers_snapshot"". > > lvremove lets me wait, then "top" shows 100% IO-Wait but does not come > to an end (at least after an hour). I don't know how much patience I > would need, this box is rather fast otherwise (dual xeon 2.8GHz w/ SATA > drives). Hi It looks like an unknown bug in lvremove. Send a strace of lvremove while it waits for that long amount of time. Mikulas > Rebooting does not help anything. > > Is there a safe way to simply get rid of this snapshot? Any help would > much be appreciated. > > Regards > --Marcel > > --- Logical volume --- > LV Name /dev/vg00/lv00_vservers > VG Name vg00 > LV UUID 9oELP3-2l7d-gTML-2xg2-unTu-znP0-qVd3Mc > LV Write Access read/write > LV snapshot status source of > /dev/vg00/vservers_snapshot [INACTIVE] > LV Status available > # open 1 > LV Size 39,06 GB > Current LE 625 > Segments 1 > Allocation contiguous > Read ahead sectors 0 > Block device 253:9 > > --- Logical volume --- > LV Name /dev/vg00/vservers_snapshot > VG Name vg00 > LV UUID cQEj3z-V2jD-QOCl-3Yea-ETQZ-Egj9-2B7nd2 > LV Write Access read/write > LV snapshot status INACTIVE destination for /dev/vg00/lv00_vservers > LV Status available > # open 0 > LV Size 39,06 GB > Current LE 625 > Segments 1 > Snapshot chunk size 4,00 KB > Allocated to snapshot 100,00% > Allocation inherit > Read ahead sectors 0 > Block device 253:8 > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ >
<<attachment: strace.zip>>
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