[Xen-bugs] [Bug 217] New: Sync gets stuck

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=217

           Summary: Sync gets stuck
           Product: Xen
           Version: unstable
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: jblack@xxxxxxxxxxx


My system generally runs normally, though there's an occasional lost interrupt
for hda. 

My system is: 
  xen-unstable-bin.tgz, ~ 9/01/05
  striped down ubuntu (hoary)
  lvm2

Occasionally lvm2 fails due to an out of memory error. After this happens,
running sync (or shutdown, which calls sync) fails. Other commands (such as
mount and umount seem to fail too). 

Occassionally lvm will succeed, but sync will start failing anyways.

I notice the following errors when running dmesg:

Warning: failed update VA mapping: 000d1046, 04adc063, 00000000
Warning: failed update VA mapping: 000d1047, 04add063, 00000000
Warning: failed update VA mapping: 000d1048, 04ade063, 00000000
Warning: failed update VA mapping: 000d1049, 04adf063, 00000000
(Theres lots of them)

Also, I see the following in /var/log/dmesg :
device-mapper: dm-linear: Device lookup failed
device-mapper: error adding target to table

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