From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: xen-devel@lists.xen.org
Cc: sstabellini@kernel.org, wei.liu2@citrix.com,
George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com,
ian.jackson@eu.citrix.com, tim@xen.org, jbeulich@suse.com,
Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: [PATCH 2/4] mm: Don't poison a page if boot-time scrubbing is off
Date: Mon, 28 Aug 2017 16:40:27 -0400 [thread overview]
Message-ID: <1503952829-11065-3-git-send-email-boris.ostrovsky@oracle.com> (raw)
In-Reply-To: <1503952829-11065-1-git-send-email-boris.ostrovsky@oracle.com>
If boot-time scrubbing is turned off we don't check pages in
check_one_page(). Thus there is no reason to ever poison them.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
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 7d56e92..34a7992 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -712,6 +712,9 @@ static void poison_one_page(struct page_info *pg)
mfn_t mfn = _mfn(page_to_mfn(pg));
uint64_t *ptr;
+ if ( !boot_scrub_done )
+ return;
+
ptr = map_domain_page(mfn);
*ptr = ~SCRUB_PATTERN;
unmap_domain_page(ptr);
--
1.8.3.1
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next prev parent reply other threads:[~2017-08-28 20:40 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-28 20:40 [PATCH 0/4] Scrubbing updates Boris Ostrovsky
2017-08-28 20:40 ` [PATCH 1/4] mm: Initialize lowmem virq when boot-time scrubbing is disabled Boris Ostrovsky
2017-08-29 11:51 ` Wei Liu
2017-08-29 13:12 ` Boris Ostrovsky
2017-08-29 13:20 ` Jan Beulich
2017-08-29 13:19 ` Jan Beulich
2017-08-28 20:40 ` Boris Ostrovsky [this message]
2017-08-29 11:52 ` [PATCH 2/4] mm: Don't poison a page if boot-time scrubbing is off Wei Liu
2017-08-28 20:40 ` [PATCH 3/4] mm: Don't request scrubbing until dom0 is running Boris Ostrovsky
2017-08-29 11:56 ` Wei Liu
2017-08-29 13:22 ` Jan Beulich
2017-08-29 13:27 ` Boris Ostrovsky
2017-08-29 13:34 ` Jan Beulich
2017-08-29 14:20 ` Boris Ostrovsky
2017-08-29 14:25 ` Jan Beulich
2017-08-29 13:26 ` Jan Beulich
2017-08-29 13:31 ` Wei Liu
2017-08-28 20:40 ` [PATCH 4/4] mm: Don't hold heap lock in alloc_heap_pages() longer than necessary Boris Ostrovsky
2017-08-29 12:16 ` Wei Liu
2017-08-29 13:33 ` Jan Beulich
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