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From: Wei Yang <richardw.yang@linux.intel.com>
To: David Hildenbrand <david@redhat.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>,
	n-horiguchi@ah.jp.nec.com, akpm@linux-foundation.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] mm/memory-failure.c: not necessary to recalculate hpage
Date: Thu, 21 Nov 2019 09:05:36 +0800
Message-ID: <20191121010536.GA12975@richard> (raw)
In-Reply-To: <fdba31c8-d0c0-83a8-62d1-c04c1e894218@redhat.com>

On Wed, Nov 20, 2019 at 04:07:38PM +0100, David Hildenbrand wrote:
>On 18.11.19 09:20, Wei Yang wrote:
>> hpage is not changed.
>> 
>> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
>> ---
>>   mm/memory-failure.c | 1 -
>>   1 file changed, 1 deletion(-)
>> 
>> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
>> index 392ac277b17d..9784f4339ae7 100644
>> --- a/mm/memory-failure.c
>> +++ b/mm/memory-failure.c
>> @@ -1319,7 +1319,6 @@ int memory_failure(unsigned long pfn, int flags)
>>   		}
>>   		unlock_page(p);
>>   		VM_BUG_ON_PAGE(!page_count(p), p);
>> -		hpage = compound_head(p);
>>   	}
>>   	/*
>> 
>
>I am *absolutely* no transparent huge page expert (sorry :) ), but won't the
>split_huge_page(p) eventually split the compound page, such that
>compound_head(p) will return something else after that call?
>

ok, you may get some point. I lost some concentration here.

Thanks

>-- 
>
>Thanks,
>
>David / dhildenb

-- 
Wei Yang
Help you, Help me


  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18  8:20 [PATCH 1/2] mm/memory-failure.c: PageHuge is handled at the beginning of memory_failure Wei Yang
2019-11-18  8:20 ` [PATCH 2/2] mm/memory-failure.c: not necessary to recalculate hpage Wei Yang
2019-11-20 15:07   ` David Hildenbrand
2019-11-21  1:05     ` Wei Yang [this message]
2019-12-02 22:28     ` Wei Yang
2019-12-05 15:06       ` David Hildenbrand
2019-12-06  1:48         ` Wei Yang
2020-01-08 12:20           ` David Hildenbrand
2020-01-09  1:58             ` Wei Yang
2019-11-19 12:23 ` [PATCH 1/2] mm/memory-failure.c: PageHuge is handled at the beginning of memory_failure David Hildenbrand
2019-11-20  0:46   ` Wei Yang
2019-11-20 15:04     ` David Hildenbrand
2019-11-21  1:07       ` Wei Yang

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