Roland Paterson-Jones
2006-Sep-19 15:43 UTC
[Xen-users] Help/problems with blktap on xen-unstable
Hi
I''ve been trying to play with the new blktap support in xen-unstable.
First, an observation - blktapctrl is pinned at 100% CPU:
-----------------------------------------------------------------------------------------------------------------
top - 17:29:48 up 4 days, 2:02, 3 users, load average: 0.90, 1.01, 1.00
Tasks: 83 total, 3 running, 80 sleeping, 0 stopped, 0 zombie
Cpu(s): 15.2% us, 34.9% sy, 0.0% ni, 49.9% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 262356k total, 240936k used, 21420k free, 4832k buffers
Swap: 917496k total, 96976k used, 820520k free, 67180k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3807 root 25 0 11040 508 400 R 99.9 0.2 0:17.56 blktapctrl
1 root 16 0 1744 124 92 S 0.0 0.0 0:00.87 init
------------------------------------------------------------------------------------------------------------------
Then, I am trying to follow the README to get an image file mounted via
tap:aio in dom0 (as a precursor, or course, to using it for rootfs in a
domU).
So:
[root@dom0-0-50-45-5d-59-aa tmp]# xm block-attach 0
tap:aio:/tmp/sparse.img /dev/xvda1 w 0
...
[root@dom0-0-50-45-5d-59-aa tmp]# xm block-list 0
Vdev BE handle state evt-ch ring-ref BE-path
51713 0 0 3 15 8 /local/domain/0/backend/tap/0/51713
But
[root@dom0-0-50-45-5d-59-aa tmp]# mount /dev/xvda1 /mnt/tapaio
mount: you must specify the filesystem type
[root@dom0-0-50-45-5d-59-aa tmp]# mount -t ext3 /dev/xvda1 /mnt/tapaio
mount: special device /dev/xvda1 does not exist
And, indeed, there''s no /dev/xvda1.
Help!
Roland
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Henning Sprang
2006-Sep-19 17:57 UTC
Re: [Xen-users] Help/problems with blktap on xen-unstable
On 9/19/06, Roland Paterson-Jones <roland@rolandpj.com> wrote:> Hi > > I''ve been trying to play with the new blktap support in xen-unstable.Interesting, maybe it''s good idea to tell the developers on xen-devel. Henning _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users