Re: [PATCH 04/11] mm: add PG_dropbehind folio flag

[Matthew Wilcox]

On Fri, Dec 20, 2024 at 01:08:39PM +0200, Kirill A. Shutemov wrote:
> On Fri, Dec 13, 2024 at 08:55:18AM -0700, Jens Axboe wrote:
> > Add a folio flag that file IO can use to indicate that the cached IO
> > being done should be dropped from the page cache upon completion.
> > 
> > Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
> 
> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> 
> + David, Vlastimil.
> 
> I think we should consider converting existing folio_set_reclaim() /
> SetPageReclaim() users to the new flag. From a quick scan, all of them
> would benefit from dropping the page after writeback is complete instead
> of leaving the folio on the LRU.

Ooh, that would be nice.  Removes the overloading of PG_reclaim with
PG_readahead, right?