Then we have enough room in the request to get rid of the dynamic
allocations in CFQ/AS.
Signed-off-by: Jens Axboe <[email protected]>
---
block/ll_rw_blk.c | 2 ++
include/linux/blkdev.h | 6 ++++++
2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 08c1615..4018254 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -451,6 +451,7 @@ static void queue_flush(request_queue_t
rq_init(q, rq);
rq->flags = REQ_HARDBARRIER;
rq->elevator_private = NULL;
+ rq->elevator_private2 = NULL;
rq->rq_disk = q->bar_rq.rq_disk;
rq->rl = NULL;
rq->end_io = end_io;
@@ -477,6 +478,7 @@ static inline struct request *start_orde
rq->flags = bio_data_dir(q->orig_bar_rq->bio);
rq->flags |= q->ordered & QUEUE_ORDERED_FUA ? REQ_FUA : 0;
rq->elevator_private = NULL;
+ rq->elevator_private2 = NULL;
rq->rl = NULL;
init_request_from_bio(rq, q->orig_bar_rq->bio);
rq->end_io = bar_end_io;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 78808a0..ba4378f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -151,7 +151,13 @@ struct request {
struct hlist_node hash; /* merge hash */
struct rb_node rb_node; /* sort/lookup */
+ /*
+ * two pointers are available for the IO schedulers, if they need
+ * more they have to dynamically allocate it.
+ */
void *elevator_private;
+ void *elevator_private2;
+
void *completion_data;
int rq_status; /* should split this into a few status bits */
--
1.4.1.ged0e0
-
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