Re: [PATCH STABLE v6.1.y] mm/migrate: set swap entry values of THP tail pages properly.

David Hildenbrand
2024-03-05T22:09:22Z

On 05.03.24 23:04, Greg KH wrote:
> On Tue, Mar 05, 2024 at 11:13:13AM -0500, Zi Yan wrote:
>> From: Zi Yan <ziy@nvidia.com>
>>
>> The tail pages in a THP can have swap entry information stored in their
>> private field. When migrating to a new page, all tail pages of the new
>> page need to update ->private to avoid future data corruption.
>>
>> Signed-off-by: Zi Yan <ziy@nvidia.com>
>> ---
>> mm/migrate.c | 6 +++++-
>> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> What is the git commit id of this change in Linus's tree?

Unfortunately, we had to do stable-only versions, because the backport
of the "accidental" fix that removes the per-subpage "private"
information would be non-trivial, especially for pre-folio-converison times.

The accidental fix is

07e09c483cbef2a252f75d95670755a0607288f5

--
Cheers,

David / dhildenb