From: Yinghai Lu <Yinghai.Lu@Sun.COM>
To: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Andi Kleen <ak@suse.de>,
Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] x86_64: not clear empty_zero_page again
Date: Wed, 02 Jan 2008 17:41:25 -0800 [thread overview]
Message-ID: <200801021741.26217.yinghai.lu@sun.com> (raw)
[PATCH] x86_64: not clear empty_zero_page again
empty_zero_page is in .bss section, and it is cleared in clear_bss by x86_64_start_kernel. So don't clear that again in mem_init
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Index: linux-2.6/arch/x86/mm/init_64.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/init_64.c
+++ linux-2.6/arch/x86/mm/init_64.c
@@ -521,8 +521,7 @@ void __init mem_init(void)
pci_iommu_alloc();
- /* clear the zero-page */
- memset(empty_zero_page, 0, PAGE_SIZE);
+ /* clear_bss() already clear the empty_zero_page */
reservedpages = 0;
next reply other threads:[~2008-01-03 1:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-03 1:41 Yinghai Lu [this message]
2008-01-03 8:45 ` [PATCH] x86_64: not clear empty_zero_page again Ingo Molnar
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