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Re: [Xen-devel] [PATCH] tools/xenctx: Correct use of xc_domain_{, un}pause()

To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
From: Ian Campbell <ian.campbell@xxxxxxxxxx>
Date: Wed, 9 Jul 2014 16:43:50 +0100
Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxx>
Delivery-date: Wed, 09 Jul 2014 15:44:09 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Fri, 2014-07-04 at 17:06 +0100, Andrew Cooper wrote:
> The previous code never worked correctly.  There was a TOCTOU race between
> checking dominfo and pausing the domain.
> 
> Since c/s 3eb1c708, Xen properly reference counts pause hypercalls, so
> unconditionally pause and unpause the domain.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Acked-by: Ian Campbell <Ian.Campbell@xxxxxxxxxx>



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  - From: Andrew Cooper

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