linux-kernel - Re: [PATCH 2/2 v2] kexec: Export PG_hwpoison flag into vmcoreinfo

Open Source and information security mailing list archives

Date:	Fri, 8 Feb 2013 17:49:44 +0900
From:	Atsushi Kumagai <kumagai-atsushi@....nes.nec.co.jp>
To:	mitsuhiro.tanino.gm@...achi.com
Cc:	vgoyal@...hat.com, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, ebiederm@...ssion.com
Subject: Re: [PATCH 2/2 v2] kexec: Export PG_hwpoison flag into vmcoreinfo

Hello,

On Wed, 31 Oct 2012 23:05:05 +0900
Mitsuhiro Tanino <mitsuhiro.tanino.gm@...achi.com> wrote:

> This patch exports a PG_hwpoison into vmcoreinfo when
> CONFIG_MEMORY_FAILURE is defined.
> "makedumpfile" needs to read information of memory, such as
> 'mem_section', 'zone', 'pageflags' from vmcore.
> 
> We introduce a function into "makedumpfile" to exclude
> hwpoison page from vmcore dump.
> In order to introduce this function, PG_hwpoison flag have
> to export into vmcoreinfo.
> 
> Signed-off-by: Mitsuhiro Tanino <mitsuhiro.tanino.gm@...achi.com>

I'm curious to know the status of this patch because I'll release
makedumpfile-1.5.2 with the feature to exclude hwpoison page soon.

Thanks
Atsushi Kumagai

> ---
>  kernel/kexec.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/kernel/kexec.c b/kernel/kexec.c
> index 0668d58..0d5d6bc 100644
> --- a/kernel/kexec.c
> +++ b/kernel/kexec.c
> @@ -1513,6 +1513,9 @@ static int __init crash_save_vmcoreinfo_init(void)
>         VMCOREINFO_NUMBER(PG_lru);
>         VMCOREINFO_NUMBER(PG_private);
>         VMCOREINFO_NUMBER(PG_swapcache);
> +#ifdef CONFIG_MEMORY_FAILURE
> +       VMCOREINFO_NUMBER(PG_hwpoison);
> +#endif
> 
>         arch_crash_save_vmcoreinfo();
>         update_vmcoreinfo_note();
> --
> 1.7.10.1
> 
> _______________________________________________
> kexec mailing list
> kexec@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
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