Use LARGE_ZERO_PAGE in __blkdev_issue_zero_pages() instead of ZERO_PAGE. On systems that support LARGE_ZERO_PAGE, we will end up sending larger bvecs instead of multiple small ones. Noticed a 4% increase in performance on a commercial NVMe SSD which does not support OP_WRITE_ZEROES. The performance gains might be bigger if the device supports larger MDTS. Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx> --- block/blk-lib.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/blk-lib.c b/block/blk-lib.c index 4c9f20a689f7..80dfc737d1f6 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -211,8 +211,8 @@ static void __blkdev_issue_zero_pages(struct block_device *bdev, unsigned int len, added; len = min_t(sector_t, - PAGE_SIZE, nr_sects << SECTOR_SHIFT); - added = bio_add_page(bio, ZERO_PAGE(0), len, 0); + ZERO_LARGE_PAGE_SIZE, nr_sects << SECTOR_SHIFT); + added = bio_add_page(bio, ZERO_LARGE_PAGE(0), len, 0); if (added < len) break; nr_sects -= added >> SECTOR_SHIFT; -- 2.47.2
