Hi,
On 04/05/17 10:39, Andrew Cooper wrote:
On 04/05/17 10:09, Jan Beulich wrote:
See the code comment.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
Acked-by: Andrew Cooper <andrew.coop...@citrix.com>
Release-acked-by: Julien Grall <julien.gr...@arm.com>
Cheers,
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -480,6 +480,22 @@ struct page_info *get_page_from_gfn_p2m(
p2m_access_t _a;
p2m_type_t _t;
mfn_t mfn;
+#ifndef NDEBUG
+ /*
+ * Temporary debugging code, added in the hope of finding the origin
+ * of calls to get_page(..., dom_cow) as observed during osstest
+ * migration failures (see
+ * lists.xenproject.org/archives/html/xen-devel/2017-04/msg03331.html).
+ */
+ static unsigned long cnt, thr;
+
+ if ( d->is_dying && ++cnt > thr )
+ {
+ thr |= cnt;
+ printk("%pv: d%d dying (looking up %lx)\n", current, d->domain_id,
gfn);
+ dump_execution_state();
+ }
+#endif
/* Allow t or a to be NULL */
t = t ?: &_t;
--
Julien Grall
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