While inspecting page blocks for the type of pages in them, I noticed a large number of blockdev cache in unmovable blocks. However, these pages are actually on the LRU, and their mapping has a .migrate_folio callback; they can be reclaimed and compacted as necessary. Put them into movable blocks, so they don't cause pollution, and subsequent proliferation, of unmovable blocks. Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> --- block/bdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/bdev.c b/block/bdev.c index edc110d90df4..6abe4766d073 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -488,7 +488,7 @@ struct block_device *bdev_alloc(struct gendisk *disk, u8 partno) inode->i_mode = S_IFBLK; inode->i_rdev = 0; inode->i_data.a_ops = &def_blk_aops; - mapping_set_gfp_mask(&inode->i_data, GFP_USER); + mapping_set_gfp_mask(&inode->i_data, GFP_USER|__GFP_MOVABLE); bdev = I_BDEV(inode); mutex_init(&bdev->bd_fsfreeze_mutex); -- 2.39.2
