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[Xen-users] blktap on debian

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] blktap on debian
From: Jonathan Selander <jonathan@xxxxxxxxx>
Date: Sat, 14 Apr 2007 23:54:06 +0200
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Hello,

I run xen 3.0.3 on Debian 4.0 and so far I've got 5 guests. I've read in the user documentation that it's better to use blktap than loopback, because of performance reasons, so i decided to switch to it. However, the root device isn't found by the guest system. I read something about CONFIG_XEN_BLKDEV_TAP being needed in the kernel for it to work, is that true? I have

CONFIG_XEN_BLKDEV_BACKEND=y
# CONFIG_XEN_BLKDEV_TAP is not set
CONFIG_XEN_BLKDEV_FRONTEND=y

The guest config disk line looks like this:

disk = [ 'tap:aio:/var/xen/domains/ac/disk.img,sda1,w', 'tap:aio:/var/xen/domains/ac/swap.img,sda2,w' ]

/Jonathan

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