 Home |
Products |
Support |
Community |
News |
xen-devel
[Xen-devel] [PATCH] Don't scrub broken pages
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] Don't scrub broken pages |
| From: | "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> |
| Date: | Mon, 8 Feb 2010 17:39:39 +0800 |
| Accept-language: | en-US |
| Acceptlanguage: | en-US |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Mon, 08 Feb 2010 01:41:09 -0800 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| List-help: | <mailto:xen-devel-request@lists.xensource.com?subject=help> |
| List-id: | Xen developer discussion <xen-devel.lists.xensource.com> |
| List-post: | <mailto:xen-devel@lists.xensource.com> |
| List-subscribe: | <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| Thread-index: | AcqooqJaZIIl3hlTRnWmHF5qWf57jg== |
| Thread-topic: | [PATCH] Don't scrub broken pages |
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@xxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: [Xen-devel] how to ouput log messages of pygrub into user console, sun.shuchun |
|---|---|
| Next by Date: | [Xen-devel] [PATCH} Dump machine check context for fatal machine check, Jiang, Yunhong |
| Previous by Thread: | [Xen-devel] [PATCH 0/7][v3] PV featured HVM(Hybrid) for Xen, Sheng Yang |
| Next by Thread: | [Xen-devel] [PATCH} Dump machine check context for fatal machine check, Jiang, Yunhong |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
