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Re: [Qemu-block] [PATCH v2] qemu-img: Document --force-share / -U

From: Kevin Wolf
Subject: Re: [Qemu-block] [PATCH v2] qemu-img: Document --force-share / -U
Date: Fri, 8 Dec 2017 12:47:48 +0100
User-agent: Mutt/1.9.1 (2017-09-22)

Am 08.12.2017 um 10:54 hat Stefan Hajnoczi geschrieben:
> On Fri, Dec 08, 2017 at 09:44:56AM +0800, Fam Zheng wrote:
> > address@hidden --force-share (-U)
> > +
> > +If specified, @code{qemu-img} will open the image with shared permissions,
> > +which makes it less likely to conflict with a running guest's permissions 
> > due
> > +to image locking. For example, this can be used to get the image 
> > information
> > +(with 'info' subcommand) when the image is used by a running guest. Note 
> > that
> > +this could produce inconsistent result because of concurrent metadata 
> > changes,
> > +etc.
> The documentation isn't clear on whether read-write is supported or just
> read-only.
> Also, should it be declared a legacy option right away to discourage
> use in new software?

I don't think this is a legacy option. As long you know what you're
doing, using it is fine.


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