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authorJens Axboe <axboe@kernel.dk>2018-08-29 19:36:56 +0300
committerJens Axboe <axboe@kernel.dk>2018-11-07 23:45:00 +0300
commitd1e36282b0bbd5de6a9c4d5275e94ef3b3438f48 (patch)
tree80328ea0526706f873113125f3bbee640615d3f2 /fs/iomap.c
parent3b6592f70ad7b4c24dd3eb2ac9bbe3353d02c992 (diff)
downloadlinux-d1e36282b0bbd5de6a9c4d5275e94ef3b3438f48.tar.xz
block: add REQ_HIPRI and inherit it from IOCB_HIPRI
We use IOCB_HIPRI to poll for IO in the caller instead of scheduling. This information is not available for (or after) IO submission. The driver may make different queue choices based on the type of IO, so make the fact that we will poll for this IO known to the lower layers as well. Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/iomap.c')
-rw-r--r--fs/iomap.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/iomap.c b/fs/iomap.c
index 64ce240217a1..f61d13dfdf09 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -1553,6 +1553,7 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos,
unsigned len)
{
struct page *page = ZERO_PAGE(0);
+ int flags = REQ_SYNC | REQ_IDLE;
struct bio *bio;
bio = bio_alloc(GFP_KERNEL, 1);
@@ -1561,9 +1562,12 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos,
bio->bi_private = dio;
bio->bi_end_io = iomap_dio_bio_end_io;
+ if (dio->iocb->ki_flags & IOCB_HIPRI)
+ flags |= REQ_HIPRI;
+
get_page(page);
__bio_add_page(bio, page, len, 0);
- bio_set_op_attrs(bio, REQ_OP_WRITE, REQ_SYNC | REQ_IDLE);
+ bio_set_op_attrs(bio, REQ_OP_WRITE, flags);
atomic_inc(&dio->ref);
return submit_bio(bio);
@@ -1662,6 +1666,9 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length,
bio_set_pages_dirty(bio);
}
+ if (dio->iocb->ki_flags & IOCB_HIPRI)
+ bio->bi_opf |= REQ_HIPRI;
+
iov_iter_advance(dio->submit.iter, n);
dio->size += n;