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| author | Jens Axboe <axboe@kernel.dk> | 2018-08-29 10:36:56 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-07 13:45:00 -0700 |
| commit | d1e36282b0bbd5de6a9c4d5275e94ef3b3438f48 (patch) | |
| tree | 80328ea0526706f873113125f3bbee640615d3f2 /fs/direct-io.c | |
| parent | 3b6592f70ad7b4c24dd3eb2ac9bbe3353d02c992 (diff) | |
| download | lwn-d1e36282b0bbd5de6a9c4d5275e94ef3b3438f48.tar.gz lwn-d1e36282b0bbd5de6a9c4d5275e94ef3b3438f48.zip | |
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/direct-io.c')
| -rw-r--r-- | fs/direct-io.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c index 722d17c88edb..ea07d5a34317 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -1265,6 +1265,8 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, } else { dio->op = REQ_OP_READ; } + if (iocb->ki_flags & IOCB_HIPRI) + dio->op_flags |= REQ_HIPRI; /* * For AIO O_(D)SYNC writes we need to defer completions to a workqueue |