Re: [kvm-devel] [PATCH] virtio_blk: allow read-only disks

On Friday 16 May 2008 19:28:27 Tomasz Chmielewski wrote:

Christian Borntraeger schrieb:

quoted

Hello Rusty,

sometimes it is useful to share a disk (e.g. usr). To avoid file system
corruption, the disk should be mounted read-only in that case.

Although it is done at a different level here, I wanted to note that
mounting a filesystem read-only does not necessarily mean the system will
not try to write to it. This is the case for ext3, for example - when
mounted ro, system will still reply the journal and do some writes etc.

The patch, however, should take care of that, too, as it is completely
different place it is made ro.

Note I'm assuming that the host will deny writes.  Telling the guest is merely 
politeness.

Cheers,
Rusty.