linux-kernel - Re: [PATCH][mmotm][BUGFIX] kcore use registered physmem information ia64-fix (Was Re: mmotm 2009-09-03-16-35 uploaded

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Message-Id: <20090911102351.DB5F.A69D9226@jp.fujitsu.com>
Date:	Fri, 11 Sep 2009 10:25:14 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	akpm@...ux-foundation.org
Cc:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH][mmotm][BUGFIX] kcore use registered physmem information ia64-fix (Was Re: mmotm 2009-09-03-16-35 uploaded

> Ok, I confirmed this one fixes the issue.

mmotm-2009-09-09 + this patch booted successful on my box.

	Tested-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

Andrew, could you please pick it up?



> ==
> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> kcore-use-registerd-physmem-information.patch registers physmem information
> based on ioresource. Then, this addition is unnecessary.
> 
> Why panic:
>   At boot, rebuilding kclist for physmem, all KCORE_RAM entries are kfreed.
>   Because this ramaining one entires kclist of KCORE_RAM in kernel data area
>   to ther list, this causes panic in kclist rebuilding which calls kfree().
> 
> Reported-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> ---
>  arch/ia64/mm/init.c |    3 ---
>  1 file changed, 3 deletions(-)
> 
> Index: mmotm-2.6.31-Sep3/arch/ia64/mm/init.c
> ===================================================================
> --- mmotm-2.6.31-Sep3.orig/arch/ia64/mm/init.c
> +++ mmotm-2.6.31-Sep3/arch/ia64/mm/init.c
> @@ -617,7 +617,6 @@ mem_init (void)
>  	long reserved_pages, codesize, datasize, initsize;
>  	pg_data_t *pgdat;
>  	int i;
> -	static struct kcore_list kcore_mem;
>  
>  	BUG_ON(PTRS_PER_PGD * sizeof(pgd_t) != PAGE_SIZE);
>  	BUG_ON(PTRS_PER_PMD * sizeof(pmd_t) != PAGE_SIZE);
> @@ -639,8 +638,6 @@ mem_init (void)
>  
>  	high_memory = __va(max_low_pfn * PAGE_SIZE);
>  
> -	kclist_add(&kcore_mem, __va(0), max_low_pfn * PAGE_SIZE, KCORE_RAM);
> -
>  	for_each_online_pgdat(pgdat)
>  		if (pgdat->bdata->node_bootmem_map)
>  			totalram_pages += free_all_bootmem_node(pgdat);
> 



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