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Re: [Qemu-devel] [PATCH v8 09/12] block: Support dropping active in bdrv
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v8 09/12] block: Support dropping active in bdrv_drop_intermediate |
Date: |
Fri, 3 Jan 2014 18:04:09 +0800 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Dec 13, 2013 at 03:35:17PM +0800, Fam Zheng wrote:
> + * 1) This will convert the following chain:
> + * ... <- base <- ... <- top <- overlay <-... <- active
> + *
> + * to
> *
> - * Requires that the overlay to 'top' is opened r/w, so that the backing file
> - * information in 'bs' can be properly updated.
> + * ... <- base <- overlay <- active
> *
> - * E.g., this will convert the following chain:
> - * bottom <- base <- intermediate <- top <- active
> + * 2) It is allowed for bottom==base, in which case it converts:
> + *
> + * ... <- base <- ... <- top <- overlay <- ... <- active
If bottom==base then I think it should be:
base <- ... <- top <- overlay <- ... <- active
(Dropping the "... <- " prefix)
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- Re: [Qemu-devel] [PATCH v8 09/12] block: Support dropping active in bdrv_drop_intermediate,
Stefan Hajnoczi <=