From f65bf735f17235c5077c83550259cacf4090b28b Mon Sep 17 00:00:00 2001 From: Boris Ostrovsky Date: Fri, 1 Sep 2017 11:06:03 +0200 Subject: [PATCH] mm: don't poison a page if scrub_debug is off If scrub_debug is off we don't check pages in check_one_page(). Thus there is no reason to ever poison them. Signed-off-by: Boris Ostrovsky Reviewed-by: Wei Liu --- xen/common/page_alloc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c index 2c7675b4d5..2b8bb95369 100644 --- a/xen/common/page_alloc.c +++ b/xen/common/page_alloc.c @@ -714,6 +714,9 @@ static void poison_one_page(struct page_info *pg) mfn_t mfn = _mfn(page_to_mfn(pg)); uint64_t *ptr; + if ( !scrub_debug ) + return; + ptr = map_domain_page(mfn); *ptr = ~SCRUB_PATTERN; unmap_domain_page(ptr); -- 2.30.2