http://bugzilla.novell.com/show_bug.cgi?id=557745 http://bugzilla.novell.com/show_bug.cgi?id=557745#c0 Summary: Write on a XFS formated logical volume after a snapshot (lvm2) on a DomU paravitualized Classification: openSUSE Product: openSUSE 11.1 Version: Final Platform: x86-64 OS/Version: openSUSE 11.1 Status: NEW Severity: Major Priority: P5 - None Component: Xen AssignedTo: jdouglas@novell.com ReportedBy: martineau.antony@free.fr QAContact: qa@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr; rv:1.9.0.15) Gecko/2009101601 Firefox/3.0.15 (.NET CLR 3.5.30729) I reproduct this bug on DomU paravirtualized opensuse11.1 and Ubuntu server 9.10 In a domU when i mount a logical volume formated in XFS no problem. But when i do a snapshot of this logical volume the disk becomes innacessible. 1 - I start my domU whith 2 disks (/dev/vg0/lv0,(hda) and /dev/vg0/lv1(hdc) i format hdc whith xfs and i mount it on /media no problem : XFS mounting filesystem hdc Ending clean XFS mount for filesystem: hdc (writes and reads on this disk is ok) 2- I do a snapshot on Dom0 about /dev/vg0/lv1 On domU i have immediatly this error.. blkfront: hdc: write barrier op failed blkfront: hdc: barriers disabled end_request: I/O error, dev hdc, sector 2097186 end_request: I/O error, dev hdc, sector 2097186 Filesystem "hdc": xlog_iodone: Barriers are no longer supported by device. Disabling barriers the disk become inaccessible... the same thing if i try on hda... the system crash because it is the system disk. The problem is not present whith ext3 or ext4 on disk... The problem seems to be beetween XFS Barriers on LVM2 and blkfront... blkfront is not capable to use xfs barriers... Reproducible: Always Steps to Reproduce: 1.Install Dom0 opensuse11.1 up to date 2.Install DomU opensuse11.1 paravirtualized on logical volume for example /dev/vg0/lv0 (hda) and /dev/vg0/lv1 (hdc) 3.In DomU format hdc disk whith XFS and mount it 4.In Dom0 do a snapshot of hdc /dev/vg0/lv1 (not hda because freeze the system) 5.In DomU looks the dmesg ( error blkfront: hdc: write barrier op failed must be appeared) Actual Results: the disks whith snapshot is inaccessible and disabling xfs barriers -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.