Daniel, which LVM version (kernel and tools) and do you have HIGHMEM configured (IOW: more than 960M memory) ? There's flaws with Linux 2.4.20 highmem which show with snapshots :( On Thu, May 29, 2003 at 02:10:29AM +0200, Daniel Bayer wrote: > Hello > > I have a E250 running Debian/stable with Linux 2.4.20 (vanilla kernel, > except for xfs). Three weeks ago I created a LV with an xfs on it. I > also created a backupscript that uses snapshots. For two weeks > everything worked fine. > > Then I got oopses during the backup (mainly from kupdated). After that > the system was rebooted. I had to boot with init=/bin/sh since the > system freezed while mounting the xfs partitions (another story). I > did a vgscan and a vgchange. After that I did a > "lvdisplay /dev/vg1/lv_snapshot" and got the usual output and 3 times > the error "Trying to vfree() nonexistent vm area (addr)". Then I tried > "lvdisplay /dev/vg1/lv" and also got the vfree()-error and a > Segmention-Fault after the line that says that there is a snapshot of > this LV. I removed the snapshot and "lvdisplay /dev/vg1/lv" worked > fine. After that I could bring the whole system in a working state. > I could reproduce this. > > The address in the vfree()-error message only changes after a reboot. > I also found older vfree()-errors in the log. > > The Backtrace of the oops always ends in > | Trace; 005143e8 <lvm_map+488/580> > | Trace; 005144e8 <lvm_make_request_fn+8/40> > > Another related problem is, that "cat /proc/lvm/global" in the most > cases doesn't output the usual data but some random memory. Its really > odd. But if I try often enough I sometimes also get the right output > (and no, I didn't calculated the probability). The other files in > /proc/lvm work fine. > > Since I moved the important stuff to another system I can do some > tests and provide further informations. > > > Daniel > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ -- Regards, Heinz -- The LVM Guy -- *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
