Re: [Xen-devel] [PATCH v5 1/9] libxc: reorganize domain builder guest memory allocator

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Nov 12, 2015 at 02:47:24PM +0000, Ian Campbell wrote:
> On Thu, 2015-11-12 at 15:03 +0100, Juergen Gross wrote:
> > On 12/11/15 14:48, Wei Liu wrote:
> > > On Thu, Nov 12, 2015 at 02:43:28PM +0100, Juergen Gross wrote:
> > > > Guest memory allocation in the domain builder of libxc is done via
> > > > virtual addresses only. In order to be able to support preallocated
> > > > areas not virtually mapped reorganize the memory allocator to keep
> > > > track of allocated pages globally and in allocated segments.
> > > > 
> > > > This requires an interface change of the allocate callback of the
> > > > domain builder which currently is using the last mapped virtual
> > > > address as a parameter. This is no problem as the only user of this
> > > > callback is stubdom/grub/kexec.c using this virtual address to
> > > > calculate the last used pfn.
> > > > 
> > > > Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> > > 
> > > If you've tested and confirmed pvgrub (stubdom based grub) doesn't
> > > break:
> > > 
> > > Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> > > 
> > 
> > Hmm, difficult. Is this ever tested automatically?
> 
> Yes, see the test-amd64-amd64-amd64-pvgrub and test-amd64-amd64-i386-pvgrub 
> jobs in any recent osstest flight (it was added a couple of months back.
> 
> http://logs.test-lab.xenproject.org/osstest/results/history/test-amd64-amd64-amd64-pvgrub/xen-unstable.html
> 
> suggests it works ok in general.
> 

Ah, so I was wrong. Thanks for correction.

Wei.

> Ian.
> 

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