[Xen-devel] [PATCH v4 2/6] x86 / p2m: remove page_list check in p2m_alloc_table...

[<paul@xxxxxxx>]

From: Paul Durrant <pdurrant@xxxxxxxxxx>

... and replace with a check of domain_tot_pages().

The check of page_list prevents the prior allocation of PGC_extra pages,
whereas what the code is trying to verify is that the toolstack has not
already RAM for the domain.

Signed-off-by: Paul Durrant <paul@xxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: George Dunlap <george.dunlap@xxxxxxxxxx>
Cc: Wei Liu <wl@xxxxxxx>
Cc: "Roger Pau Monné" <roger.pau@xxxxxxxxxx>

v4:
 - Re-worked so as not to completely remove the check

v2:
 - New in v2
---
 xen/arch/x86/mm/p2m.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index 3719deae77..9f51370327 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -695,8 +695,7 @@ int p2m_alloc_table(struct p2m_domain *p2m)
 
     p2m_lock(p2m);
 
-    if ( p2m_is_hostp2m(p2m)
-         && !page_list_empty(&d->page_list) )
+    if ( p2m_is_hostp2m(p2m) && domain_tot_pages(d) )
     {
         P2M_ERROR("dom %d already has memory allocated\n", d->domain_id);
         p2m_unlock(p2m);
-- 
2.20.1


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