Closes:
https://lore.kernel.org/linux-mm/69cb784f-578d-ded1-cd9f-c6db04696336@xxxxxxxxxxx/
Fixes: 3417013e0d18 ("mm/migrate: Add folio_migrate_mapping()")
Cc: <stable@xxxxxxxxxxxxxxx> # see patch description, applicable to <=6.1
Signed-off-by: Charan Teja Kalla <quic_charante@xxxxxxxxxxx>
3417013e0d18 went into 5.16.
cfeed8ffe55b3 went into 6.6.
So only 6.1 is affected.
I tried to dig why the older kernels don't have this issue. The issue
persists on the older kernels too, AFAICS. See,
migrate_page_move_mapping().
So, The Fixes: tag too is unique for 6.1 kernel. And older LTS kernel
requires different tag it seems..
Isn't there a way to bite the bullet and backport that series to 6.1
instead?
My worry is that, because of merge conflicts, not sure If It can end up
in inducing some other issues.
Although we didn't test THP on older kernels, from the code walk, it
seems issue persists to me on older to 6.1 kernel, unless I am missing
something here. So back porting of this series to all those LTS kernels,
may not be a straight forward?
So, I am really not sure of what is the way forward here...