Messages in this thread | | | Date | Wed, 24 Aug 2011 11:31:30 +0300 | From | Avi Kivity <> | Subject | Re: linux next: Native Linux KVM tool inclusion request |
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On 08/23/2011 08:08 AM, Pekka Enberg wrote: > As for changes, we've implemented rootfs over 9p with "kvm run" > booting to host filesystem "/bin/sh" by default.
Isn't this dangerous? Users expect virtualization to land them in sandbox, but here an rm -rf / in the guest will happily junk the host filesystem.
> It still needs some > work and we hope to enable networking too. We also have patches to use > overlayfs so that the guest is able to use host filesystem in > copy-on-write manner. >
Still dangerous (but just to the guest), since it's not a true snapshot. If the host filesystem changes underneath the guest, it will see partial and incoherent updates. Copy-on-write only works if the host filesystem doesn't change.
-- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.
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