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

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Date:	Tue, 12 Feb 2013 12:07:13 +0900
From:	Mitsuhiro Tanino <mitsuhiro.tanino.gm@...achi.com>
To:	Atsushi Kumagai <kumagai-atsushi@....nes.nec.co.jp>,
	ebiederm@...ssion.com
Cc:	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	vgoyal@...hat.com
Subject: Re: [PATCH 2/2 v2] kexec: Export PG_hwpoison flag into vmcoreinfo

Re: [Patch 0/2] Exclude hwpoison page from vmcore dump
(2012/11/01 19:40), Eric W. Biederman wrote:
> Mitsuhiro Tanino <mitsuhiro.tanino.gm@...achi.com> writes:
> I agree.  If we are performing filtering filtering out of poisoned pages
> seems very reasonable.  So ack on the basic concept.
> 
> Eric

Hello, Eric,

Could you please push the patch to export PG_hwpoison flag into 3.9 during
next merge window?

Kumagai-san acked the patch which provides the feature to exclude hwpoison
page and he will push the fix of makedumpfile side into makedumpfile-1.5.2.
This kernel patch is also required to enable this feature.

Regards,
Mitsuhiro Tanino

(2013/02/08 17:49), Atsushi Kumagai wrote:
> 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
> 
> _______________________________________________
> kexec mailing list
> kexec@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
> .
> 

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