From: Vegard Nossum <vegard.nossum@gmail.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>, linux-kernel@vger.kernel.org
Subject: [PATCH -tip] kmemcheck: use set_memory_4k() on x86_64 only
Date: Sun, 5 Oct 2008 19:22:30 +0200 [thread overview]
Message-ID: <20081005172230.GA24825@localhost.localdomain> (raw)
>From 5bce9b1674e84ff36ba8f5a390b2ad30cd42b29a Mon Sep 17 00:00:00 2001
From: Vegard Nossum <vegard.nossum@gmail.com>
Date: Wed, 1 Oct 2008 18:36:42 +0200
Subject: [PATCH] kmemcheck: use set_memory_4k() on x86_64 only
x86_32 already disables PSE capabilities and is fine. We need this to
avoid the BUG in cache-flushing SMP call.
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
---
arch/x86/mm/kmemcheck/kmemcheck.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/mm/kmemcheck/kmemcheck.c b/arch/x86/mm/kmemcheck/kmemcheck.c
index 5a08a70..d649aa7 100644
--- a/arch/x86/mm/kmemcheck/kmemcheck.c
+++ b/arch/x86/mm/kmemcheck/kmemcheck.c
@@ -295,7 +295,9 @@ void kmemcheck_hide_pages(struct page *p, unsigned int n)
{
unsigned int i;
+#ifdef CONFIG_X86_64
set_memory_4k((unsigned long) page_address(p), n);
+#endif
for (i = 0; i < n; ++i) {
unsigned long address;
--
1.5.5.1
reply other threads:[~2008-10-05 17:22 UTC|newest]
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