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Re: [Qemu-devel] [PATCH v6 2/2] qemu-img: Document --force-share / -U
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v6 2/2] qemu-img: Document --force-share / -U |
Date: |
Tue, 30 Jan 2018 12:14:59 +0000 |
User-agent: |
Mutt/1.9.1 (2017-09-22) |
On Tue, Jan 30, 2018 at 02:34:33PM +0800, Fam Zheng wrote:
> Signed-off-by: Fam Zheng <address@hidden>
> Signed-off-by: Kevin Wolf <address@hidden>
> ---
> qemu-img.texi | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/qemu-img.texi b/qemu-img.texi
> index 60a0e080c6..ec7e2f5d1e 100644
> --- a/qemu-img.texi
> +++ b/qemu-img.texi
> @@ -86,6 +86,13 @@ exclusive with the @var{-O} parameters. It is currently
> required to also use
> the @var{-n} parameter to skip image creation. This restriction may be
> relaxed
> in a future release.
>
> address@hidden --force-share (-U)
> +If specified, @code{qemu-img} will open the image in shared mode, allowing
> +concurrent writers.
This wording confuses me. It makes me think of multiple processes
writing to the image at the same time...
> This option is only allowed when opening images in read-only mode.
...but later it turns out "concurrent writers" means there can be at
most 1 writing process and multiple reading processes.
How about merging the two statements?
"If specified, allows @code{qemu-img} to open the image in read-only
mode even if another process already has it open for writing."
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