Don''t scrub broken pages Don''t touch the poison pages when scrub the pages. Consuming poison page will contaminate the CPU context and may cause system crash. Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com> diff -r 08c3ff62b8e9 xen/common/page_alloc.c --- a/xen/common/page_alloc.c Mon Feb 08 13:27:41 2010 +0800 +++ b/xen/common/page_alloc.c Mon Feb 08 14:32:32 2010 +0800 @@ -1256,6 +1256,9 @@ void scrub_one_page(struct page_info *pg { void *p = __map_domain_page(pg); + if ( unlikely(pg->count_info & PGC_broken) ) + return; + #ifndef NDEBUG /* Avoid callers relying on allocations returning zeroed pages. */ memset(p, 0xc2, PAGE_SIZE); _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel