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

[Rusty Russell <rusty@xxxxxxxxxxxxxxx>]

On Friday 16 May 2008 19:28:27 Tomasz Chmielewski wrote:
> Christian Borntraeger schrieb:
> > 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.

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