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x86_64: not clear empty_zero_page again

PATCH Applied Yinghai Lu 2 participants 2 messages Jan 3, 2008

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x86 x86 MM
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Yinghai Lu

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PATCH 1/1 x86_64: not clear empty_zero_page again

[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 <[email protected]>
arch/x86/mm/init_64.c +1 -2
Index: 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;
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Quoted 4 lines · Yinghai Lu

[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

thanks, applied.

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