Attachment 156474 Details for Bug 242630 – fixes sysrq+m OOPS

[patch] fixes sysrq+m OOPS

x86_64-for-show_mem-when-SPARSEMEM-is-configured.patch (text/plain), 2.26 KB, created by Arnaldo Carvalho de Melo on 2007-06-07 15:43:34 UTC

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Creator: Arnaldo Carvalho de Melo

Created: 2007-06-07 15:43:34 UTC

Size: 2.26 KB

patch

obsolete

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>From: "Bob Picco" <bob.picco@hp.com>
>Date: Thu, 7 Jun 2007 11:21:05 -0400
>To: acme@redhat.com
>Cc: bob.picco@hp.com
>Subject: [PATCH] x86_64 for show_mem when SPARSEMEM is configured
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>
>We aren't sampling for holes in memory. Thus we encounter a section hole with
>empty section map pointer for SPARSEMEM and OOPs for show_mem.
>
>Signed-off-by: Bob Picco <bob.picco@hp.com>
>
> arch/x86_64/mm/init.c |    2 ++
> 1 file changed, 2 insertions(+)
>
>Index: linux-2.6.22-rc4-mm1/arch/x86_64/mm/init.c
>===================================================================
>--- linux-2.6.22-rc4-mm1.orig/arch/x86_64/mm/init.c	2007-06-06 12:59:26.000000000 -0400
>+++ linux-2.6.22-rc4-mm1/arch/x86_64/mm/init.c	2007-06-07 11:14:31.000000000 -0400
>@@ -79,6 +79,8 @@ void show_mem(void)
> 			if (unlikely(i % MAX_ORDER_NR_PAGES == 0)) {
> 				touch_nmi_watchdog();
> 			}
>+			if (!pfn_valid(pgdat->node_start_pfn + i))
>+				continue;
> 			page = pfn_to_page(pgdat->node_start_pfn + i);
> 			total++;
> 			if (PageReserved(page))

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Attachments on bug 242630: 156474