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Re: kern/53616: dom0 crashes when dumping domU images with vnd+fss
The following reply was made to PR kern/53616; it has been noted by GNATS.
From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/53616: dom0 crashes when dumping domU images with vnd+fss
Date: Tue, 18 Sep 2018 17:19:04 +0200
On Tue, Sep 18, 2018 at 02:35:01PM +0000, triaxx%NetBSD.org@localhost wrote:
> I weekly backup my 3 VMs by snapshoting the associated image file:
> 1) vndconfig over the vm.img
> 2) mount the vnd device
> 3) fssconfig over the mountpoint
> 4) dd the fss device over the network
Are the VMs still running while you do this ?
If so it's no surprise that the dom0 panic: one of its mounted
filesystem got modified in its back ... you can't have the same filesystem
in use by 2 different OS instances at the same time.
You would need to snapshot and do the backup from the VM itself.
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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