Re: [PATCH v3 01/14] memory-failure: fetch compound_head after pgmap_pfn_valid()

[Joao Martins]

On 7/15/21 3:51 AM, Muchun Song wrote:
> On Thu, Jul 15, 2021 at 3:36 AM Joao Martins <joao.m.mart...@oracle.com> 
> wrote:
>>
>> memory_failure_dev_pagemap() at the moment assumes base pages (e.g.
>> dax_lock_page()).  For pagemap with compound pages fetch the
>> compound_head in case a tail page memory failure is being handled.
>>
>> Currently this is a nop, but in the advent of compound pages in
>> dev_pagemap it allows memory_failure_dev_pagemap() to keep working.
>>
>> Reported-by: Jane Chu <jane....@oracle.com>
>> Signed-off-by: Joao Martins <joao.m.mart...@oracle.com>
>> Reviewed-by: Naoya Horiguchi <naoya.horigu...@nec.com>
> 
> Reviewed-by: Muchun Song <songmuc...@bytedance.com>
> 
Thanks!