Commit 77d07522 authored by Jens Axboe's avatar Jens Axboe Committed by Andrew Morton
Browse files

mm/readahead: add readahead_control->dropbehind member 

If ractl->dropbehind is set to true, then folios created are marked as
dropbehind as well.

Link: https://lkml.kernel.org/r/20241220154831.1086649-6-axboe@kernel.dk


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Reviewed-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Brian Foster <bfoster@redhat.com>
Cc: Chris Mason <clm@meta.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent cceba6f7

include/linux/pagemap.h

+1 −0
Original line number Diff line number Diff line
@@ -1358,6 +1358,7 @@ struct readahead_control { 
	pgoff_t _index;

	unsigned int _nr_pages;

	unsigned int _batch_count;

	bool dropbehind;

	bool _workingset;

	unsigned long _pflags;

};

mm/readahead.c

+7 −1
Original line number Diff line number Diff line
@@ -181,7 +181,13 @@ static void read_pages(struct readahead_control *rac) 
static struct folio *ractl_alloc_folio(struct readahead_control *ractl,

				       gfp_t gfp_mask, unsigned int order)

{

	return filemap_alloc_folio(gfp_mask, order);

	struct folio *folio;



	folio = filemap_alloc_folio(gfp_mask, order);

	if (folio && ractl->dropbehind)

		__folio_set_dropbehind(folio);



	return folio;

}



/**