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Re: [Xen-ia64-devel] [IA64] Weekly benchmark results [ww26]

To: KUWAMURA Shin'ya <kuwa@xxxxxxxxxxxxxx>
Subject: Re: [Xen-ia64-devel] [IA64] Weekly benchmark results [ww26]
From: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Date: Mon, 2 Jul 2007 17:24:04 +0900
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On Fri, Jun 29, 2007 at 03:26:18PM +0900, KUWAMURA Shin'ya wrote:

> As for this changeset, booting domU using tap:aio succeeded, but
> failed after the second. DomU's output:
>   Xen p2m: to [0x0000000020000000, 0x0000000024000000) (65536 KBytes)
>   XENBUS: Timeout connecting to device: device/vbd/769 (state 3)
>   XENBUS: Device with no driver: device/console/0
>   VFS: Cannot open root device "hda1" or unknown-block(0,0)
>   Please append a correct "root=" boot option
>   Kernel panic - not syncing: VFS: Unable to mount root fs on 
> unknown-block(0,0)

Hi.
blktap works for me. Could you check the followings?
- Does dom0 support blktap and aio?
  If you use kernel module, make sure that the module is inserted.
- Is blktapctrl daemon running right after xend starting?
  You can check it by ps command and the system log.
- Is tapdisk daemon running after domU starting? Or does it complain?
  You can check it by ps command and the system log.

NOTE:
You might have to edit your /etc/syslog.conf.
blktap uses the system logger unlike other xen related daemon.

thanks,
-- 
yamahata

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