linux-kernel - Re: [PATCH 4/4] export the kernel image size KERNEL_IMAGE

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Date:	Tue, 9 Sep 2014 15:47:05 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Baoquan He <bhe@...hat.com>
Cc:	linux-kernel@...r.kernel.org, ak@...ux.intel.com, mingo@...hat.com,
	whissi@...ssi.de, dyoung@...hat.com, tglx@...utronix.de,
	keescook@...omium.org, chaowang@...hat.com,
	Atsushi Kumagai <kumagai-atsushi@....nes.nec.co.jp>
Subject: Re: [PATCH 4/4] export the kernel image size KERNEL_IMAGE_SIZE

On Fri, Sep 05, 2014 at 10:08:17PM +0800, Baoquan He wrote:
> Now kaslr makes kernel image size changable, not the fixed size 512M.
> So KERNEL_IMAGE_SIZE need be exported to VMCOREINFO, otherwise makedumfile
> will crash.
> 
> Signed-off-by: Baoquan He <bhe@...hat.com>

This one sounds reasonable. CCing Atshushi. 

Thanks
Vivek

> ---
>  kernel/kexec.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/kernel/kexec.c b/kernel/kexec.c
> index 2bee072..bd680d3 100644
> --- a/kernel/kexec.c
> +++ b/kernel/kexec.c
> @@ -2003,6 +2003,9 @@ static int __init crash_save_vmcoreinfo_init(void)
>  #endif
>  	VMCOREINFO_NUMBER(PG_head_mask);
>  	VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
> +#ifdef CONFIG_X86
> +       VMCOREINFO_NUMBER(KERNEL_IMAGE_SIZE);
> +#endif
>  #ifdef CONFIG_HUGETLBFS
>  	VMCOREINFO_SYMBOL(free_huge_page);
>  #endif
> -- 
> 1.8.5.3
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