From 8a2ee44a371c8cbef587ea609908c3cbf1645231 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 15 Feb 2019 19:13:07 +0800 Subject: [PATCH] btrfs: look at bi_size for repair decisions bio_readpage_error currently uses bi_vcnt to decide if it is worth retrying an I/O. But the vector count is mostly an implementation artifact - it really should figure out if there is more than a single sector worth retrying. Use bi_size for that and shift by PAGE_SHIFT. This really should be blocks/sectors, but given that btrfs doesn't support a sector size different from the PAGE_SIZE using the page size keeps the changes to a minimum. Reviewed-by: Omar Sandoval Reviewed-by: David Sterba Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- fs/btrfs/extent_io.c | 2 +- include/linux/bio.h | 6 ------ 2 files changed, 1 insertion(+), 7 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 52abe40..dc8ba3e 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2350,7 +2350,7 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset, int read_mode = 0; blk_status_t status; int ret; - unsigned failed_bio_pages = bio_pages_all(failed_bio); + unsigned failed_bio_pages = failed_bio->bi_iter.bi_size >> PAGE_SHIFT; BUG_ON(bio_op(failed_bio) == REQ_OP_WRITE); diff --git a/include/linux/bio.h b/include/linux/bio.h index 7380b09..72b4f7b 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -263,12 +263,6 @@ static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv) bv->bv_len = iter.bi_bvec_done; } -static inline unsigned bio_pages_all(struct bio *bio) -{ - WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); - return bio->bi_vcnt; -} - static inline struct bio_vec *bio_first_bvec_all(struct bio *bio) { WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); -- 2.7.4