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Re: [libvirt] [PATCH] qemu: turn on virtlockd by default

On Wed, Feb 01, 2017 at 16:54:01 +0000, Daniel Berrange wrote:
> The virtlockd daemon has existed for years now, but we have never
> turned it on by default, requiring explicit user opt-in. This leaves
> users unprotected against accidents out of the box.
> By turning it on by default, users will at least be protected for
> mistakes involving local files, and files on shared filesystems
> that support fcntl() (eg NFS).
> In turning it on the various services files are updated to have
> the same dependancies for virtlockd as we have for virtlogd
> now, since turning the latter on exposed some gaps.
> Signed-off-by: Daniel P. Berrange <berrange redhat com>
> ---

Unfortunately ... NACK, while I fixed quite some bugs with locking and
block jobs few of them are still present. Mostly non-active layer block
commit where we will leak the locked file once we finish the job as we
are not tracking the job progress ( and nor can we properly do so since
qemu jobs vanish right after finishing). I discussed it today with Kevin
Wolf and John Snow and they plan to add a way for the jobs to linger.

Until than I don't think we should enable this especially not auto disk


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