On 13.01.25 10:34, Kirill A. Shutemov wrote:
The recently introduced PG_dropbehind allows for freeing folios immediately after writeback. Unlike PG_reclaim, it does not need vmscan to be involved to get the folio freed. Instead of using folio_set_reclaim(), use folio_set_dropbehind() in shrink_folio_list(). It is safe to leave PG_dropbehind on the folio if, for some reason (bug?), the folio is not in a writeback state after ->writepage(). In these cases, the kernel had to clear PG_reclaim as it shared a page flag bit with PG_readahead. Also use PG_dropbehind instead PG_reclaim to detect I/O congestion. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> ---
Acked-by: David Hildenbrand <david@xxxxxxxxxx> -- Cheers, David / dhildenb
