From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [PATCH 2/5] hypervisor/xen/tools: Remove the
 XENMEM_get_oustanding_pages and provide the data via xc_phys_info
Date: Tue, 14 May 2013 09:28:43 -0400
Message-ID: <20130514132843.GI5558@phenom.dumpdata.com>
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To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: George Dunlap <George.Dunlap@eu.citrix.com>, "dgdegra@tycho.nsa.gov" <dgdegra@tycho.nsa.gov>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>
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On Tue, May 14, 2013 at 10:36:53AM +0100, Ian Campbell wrote:
> On Mon, 2013-05-13 at 20:29 +0100, Konrad Rzeszutek Wilk wrote:
> > During the review of the patches it was noticed that there exists
> > a race wherein the 'free_memory' value consists of information from
> > two hypercalls. That is the XEN_SYSCTL_physinfo and XENMEM_get_outstanding_pages.
> > 
> > The free memory the host has available for guest is the difference between
> > the 'free_pages' (from XEN_SYSCTL_physinfo) and 'outstanding_pages'. As they
> > are two hypercalls many things can happen in between the execution of them.
> > 
> > This patch resolves this by eliminating the XENMEM_get_outstanding_pages
> > hypercall and providing the free_pages and outstanding_pages information
> > via the xc_phys_info structure.
> > 
> > It also removes the XSM hooks and adds locking as needed.
> > 
> > Acked-by: Ian Campbell <ian.campbell@citrix.com>
> > Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
> > Reviewed-by: Tim Deegan <tim@xen.org>
> > Acked-by: Keir Fraser <keir.xen@gmail.com>
> > [v1: Fix missing XSM hooks cleanups, fixed get_outstanding_claims fnc,
> >   add Acked/Reviewed-by]
> > [v2: s/%ld/PRIu64/ as we don't use 'long' anymore]
> > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> 
> I think we've discussed this before but your tags should be in a roughly
> chronological order, not backwards in time as you have them. Or at least
> that's how everyone else does it.

Grrr.. Old habbits. Will make sure to have it in the prefer order.
> 
> Also the intra-version changelog should go afterwards following a "---"
> so it is stripped from the final commit.

OK, will do that in the future as well for Xen patches.
> 
> I've fixed this as I applied #2..#5. #1 was already in since before your
> previous posting.

Thank you.
> 
> Ian.
> 
> 
> 
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