Murthy Kambhampaty said the following on 20/10/03 18:10: >>-----Original Message----- >>From: Ronny Adsetts [mailto:ronny.adsetts@amazinginternet.com] >>Sent: Friday, October 17, 2003 12:39 >> >>Software used: >>Debian: 3.0 (Mostly) >>Kernel: 2.4.21 >>Kernel patches: Debian standard kernel patches; XFS 1.3.0 >>LVM utils: 1.0.4-4 (Debian) >>XFS utils: 2.5.6-1 (Debian) >> >>Sequence of actions: >>1: xfs_freeze -f /home >>2: lvcreate -L 1G -s -n home_lv_bak /dev/vg0/home_lv >>3: xfs_freeze -u /home >>4: mount -t xfs -onouuid,ro,usrquota /dev/vg0/home_lv_bak /mnt/home >>5: umount /mnt/home >>6: lvremove -f /dev/vg0/home_lv_bak >> >>On step 5 of above, an error is logged: >> >>Logs: >>Oct 17 17:23:44 jettero kernel: lvm - lvm_map: ll_rw_blk write for >>readonly LV /dev/vg0/home_lv_bak >>Oct 17 17:23:44 jettero kernel: xfs_force_shutdown(lvm(58,10),0x1) >>called from line 351 of file xfs_rw.c. Return address = 0xc01fd6aa >>Oct 17 17:23:44 jettero kernel: Filesystem "lvm(58,10)": I/O Error >>Detected. Shutting down filesystem: lvm(58,10) >>Oct 17 17:23:44 jettero kernel: Please umount the filesystem, and >>rectify the problem(s) >
I got these error messages on the Wolk 4.9s kernel, but not on XFS CVS kernels (or vanilla linux with XFS patches applied). This is a somewhat random guess, but you might try to upgrade LVM to 1.0.7, following the LVM how-to, and see if the problem persists.
I've built a later version of LVM 1 tools, but not had a chance to try them yet (probably won't bother now).
I did see this this today which appears to be the same issue:
http://www.kerneltraffic.org/kernel-traffic/kt20031027_238.html#4
From Marcelo Tosatti[1]: "It seems its not safe to create snapshots of journalled fs'es without this patch[2]."
Looks like the patch will show up in mainline in the 2.4.24-pre series.
[1] http://marc.theaimsgroup.com/?l=linux-kernel&m=106642797513724&w=2 [2] http://marc.theaimsgroup.com/?l=linux-kernel&m=106623350522639&q=p3
Regards, Ronny -- Technical Director Amazing Internet Ltd, London t: +44 20 8607 9535 f: +44 20 8607 9536 w: www.amazinginternet.com
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