[Xen-bugs] [Bug 1625] New: lk_tap: Error initialising /dev/xen/blktap - No more devices

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1625

           Summary: lk_tap: Error initialising /dev/xen/blktap - No more
                    devices
           Product: Xen
           Version: 3.0 (general)
          Platform: x86-64
        OS/Version: Linux-2.6
            Status: NEW
          Severity: blocker
          Priority: P1
         Component: 2.6.18 dom0
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: laurent.henry@xxxxxxxx
                CC: laurent.henry@xxxxxxxx


On openSUSE 11.2 (x86_64) with xen-tools-3.4.1_19718_04-2.1.x86_64
kernel-xen-base-2.6.31.8-0.1.1.x86_64
xen-libs-3.4.1_19718_04-2.1.x86_64
kernel-xen-2.6.31.8-0.1.1.x86_64
xen-kmp-desktop-3.4.1_19718_04_2.6.31.5_0.1-2.1.x86_64
xen-3.4.1_19718_04-2.1.x86_64

i can no more create or reboot VMs with tap:aio driver. All seems to be fin
with VMs with "file" driver

My vms complains about no mounted disks and i find in my logs:

un  7 16:11:41 alca2 kernel: [12537879.848530] blk_tap: Error initialising
/dev/xen/blktap - No more devices
Jun  7 16:11:41 alca2 logger: /etc/xen/scripts/blktap: Writing
backend/tap/136/51712/hotplug-status connected to xenstore.
Jun  7 16:11:41 alca2 logger: /etc/xen/scripts/blktap: Writing
backend/tap/136/51728/hotplug-status connected to xenstore.
Jun  7 16:11:44 alca2 kernel: [12533839.409637] blktap: ring-ref 8,
event-channel 12, protocol 1 (x86_64-abi)
Jun  7 16:11:44 alca2 kernel: [12533839.412361] blktap: ring-ref 9,
event-channel 13, protocol 1 (x86_64-abi)
Jun  7 16:12:09 alca2 logger: /etc/xen/scripts/blktap: remove
XENBUS_PATH=backend/tap/136/51712
Jun  7 16:12:09 alca2 logger: /etc/xen/scripts/blktap: remove
XENBUS_PATH=backend/tap/136/51728
Jun  7 16:12:09 alca2 logger: /etc/xen/scripts/blktap: remove
XENBUS_PATH=backend/tap/136/51728
Jun  7 16:12:09 alca2 logger: /etc/xen/scripts/blktap: remove
XENBUS_PATH=backend/tap/136/51712


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