At 15:44 +0200 on 27 Jun (1309189494), Christoph Egger wrote:
>
> I think, this patch can be folded into the first one.
I don't see which patch it would be folded into. It's a distinct change
from the change to the flush implementation.
> Otherwise:
>
> Ack-by: Christoph Egger <Christoph.Egger@xxxxxxx>
Thank you. I'll apply them all this afternoon.
Tim.
> On 06/27/11 12:46, Tim Deegan wrote:
> ># HG changeset patch
> ># User Tim Deegan<Tim.Deegan@xxxxxxxxxx>
> ># Date 1308929084 -3600
> ># Node ID 0753351afbbe1c3fdde3a72dfb5a67105524f813
> ># Parent 97e15368260c093078e1f1bc04521de30c1792cc
> >Nested p2m: flush only one p2m table when reallocating.
> >It's unhelpful to flush all of them when we only need one.
> >
> >Reported-by: Christoph Egger<Christoph.Egger@xxxxxxx>
> >Signed-off-by: Tim Deegan<Tim.Deegan@xxxxxxxxxx>
> >
> >diff -r 97e15368260c -r 0753351afbbe xen/arch/x86/mm/p2m.c
> >--- a/xen/arch/x86/mm/p2m.c Fri Jun 24 16:24:44 2011 +0100
> >+++ b/xen/arch/x86/mm/p2m.c Fri Jun 24 16:24:44 2011 +0100
> >@@ -1120,7 +1120,6 @@ p2m_get_nestedp2m(struct vcpu *v, uint64
> > volatile struct nestedvcpu *nv =&vcpu_nestedhvm(v);
> > struct domain *d;
> > struct p2m_domain *p2m;
> >- int i;
> >
> > /* Mask out low bits; this avoids collisions with CR3_EADDR */
> > cr3&= ~(0xfffull);
> >@@ -1146,12 +1145,9 @@ p2m_get_nestedp2m(struct vcpu *v, uint64
> > }
> >
> > /* All p2m's are or were in use. Take the least recent used one,
> >- * flush it and reuse.
> >- */
> >- for (i = 0; i< MAX_NESTEDP2M; i++) {
> >- p2m = p2m_getlru_nestedp2m(d, NULL);
> >- p2m_flush_locked(p2m);
> >- }
> >+ * flush it and reuse. */
> >+ p2m = p2m_getlru_nestedp2m(d, NULL);
> >+ p2m_flush_locked(p2m);
> > nv->nv_p2m = p2m;
> > p2m->cr3 = cr3;
> > nv->nv_flushp2m = 0;
> >
>
>
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--
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd. (Company #02937203, SL9 0BG)
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