Re: [PATCH v2] mm: clean up hwpoison page cache page in fault path

[David Hildenbrand]

On 15.02.22 16:01, Rik van Riel wrote:
> On Tue, 2022-02-15 at 12:22 +0100, David Hildenbrand wrote:
>> On 13.02.22 03:37, Rik van Riel wrote:
>>> Sometimes the page offlining code can leave behind a hwpoisoned
>>> clean
>>> page cache page. This can lead to programs being killed over and
>>> over
>>> and over again as they fault in the hwpoisoned page, get killed,
>>> and
>>> then get re-spawned by whatever wanted to run them.
>>
>> Hi Rik,
>>
>> am I correct that you are only talking about soft offlining as
>> triggered
>> from mm/memory-failure.c, not page offlining as in memory offlining
>> mm/memory_hotunplug.c ?
> 
> That is correct in that I am talking only about memory-failure.c,
> however the code in memory-failure.c has both hard and soft
> offlining modes, and I suppose this patch covers both?
> 

Right, for hwpoison handling there is hard and soft offlining of pages
... maybe "hwpoison page offlining" would be clearer, not sure.

Thanks for clarifying!

-- 
Thanks,

David / dhildenb