On 2025/1/6 17:03, Barry Song wrote:
On Mon, Jan 6, 2025 at 7:40 PM Baolin Wang
<baolin.wang@xxxxxxxxxxxxxxxxx> wrote:
On 2025/1/6 11:17, Barry Song wrote:
From: Barry Song <v-songbaohua@xxxxxxxx>
The refcount may be temporarily or long-term increased, but this does
not change the fundamental nature of the folio already being lazy-
freed. Therefore, we only reset 'swapbacked' when we are certain the
folio is dirty and not droppable.
Suggested-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Barry Song <v-songbaohua@xxxxxxxx>
The changes look good to me. While we are at it, could you also change
the __discard_anon_folio_pmd_locked() to follow the same strategy for
lazy-freed PMD-sized folio?
it seems you mean __discard_anon_folio_pmd_locked() is lacking
folio_set_swapbacked(folio) for dirty pmd-mapped folios?
and it seems !(vma->vm_flags & VM_DROPPABLE) is also not
handled properly?
Right.
