linux-kernel - Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

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Date:	Tue, 19 Aug 2008 16:53:59 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Rafał Miłecki <zajec5@...il.com>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging
 request"

Rafał Miłecki wrote:
> Bug still exists in current git (tested 15 minutes ago).
>   

Could you apply this patch and post the output of dmesg from booting (no
need to crash it again).

Thanks,
    J

diff -r 3f465c361b3c arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c	Wed Aug 13 20:50:10 2008 -0700
+++ b/arch/x86/mm/init_64.c	Tue Aug 19 16:50:10 2008 -0700
@@ -331,6 +331,8 @@
 		}
 
 		if (pmd_val(*pmd)) {
+			printk("addr %lx reusing pmd %lx %016lx\n",
+			       address, __pa(pmd), pmd_val(*pmd));
 			if (!pmd_large(*pmd))
 				last_map_addr = phys_pte_update(pmd, address,
 								 end);
@@ -392,6 +394,8 @@
 		}
 
 		if (pud_val(*pud)) {
+			printk("addr %lx reusing pud %lx %016lx\n",
+			       addr, __pa(pud), pud_val(*pud));
 			if (!pud_large(*pud))
 				last_map_addr = phys_pmd_update(pud, addr, end,
 							 page_size_mask);
@@ -500,6 +504,8 @@
 			next = end;
 
 		if (pgd_val(*pgd)) {
+			printk("addr %lx reusing pgd %lx %016lx\n",
+			       __pa(start), __pa(pgd), pgd_val(*pgd));
 			last_map_addr = phys_pud_update(pgd, __pa(start),
 						 __pa(end), page_size_mask);
 			continue;


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