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-rw-r--r--include/linux/blkdev.h52
1 files changed, 35 insertions, 17 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index efdc9b5bc05..a33a31e71bb 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -96,8 +96,8 @@ struct io_context {
void put_io_context(struct io_context *ioc);
void exit_io_context(void);
-struct io_context *current_io_context(int gfp_flags);
-struct io_context *get_io_context(int gfp_flags);
+struct io_context *current_io_context(gfp_t gfp_flags);
+struct io_context *get_io_context(gfp_t gfp_flags);
void copy_io_context(struct io_context **pdst, struct io_context **psrc);
void swap_io_context(struct io_context **ioc1, struct io_context **ioc2);
@@ -107,9 +107,9 @@ typedef void (rq_end_io_fn)(struct request *);
struct request_list {
int count[2];
int starved[2];
+ int elvpriv;
mempool_t *rq_pool;
wait_queue_head_t wait[2];
- wait_queue_head_t drain;
};
#define BLK_MAX_CDB 16
@@ -203,6 +203,7 @@ struct request {
enum rq_flag_bits {
__REQ_RW, /* not set, read. set, write */
__REQ_FAILFAST, /* no low level driver retries */
+ __REQ_SORTED, /* elevator knows about this request */
__REQ_SOFTBARRIER, /* may not be passed by ioscheduler */
__REQ_HARDBARRIER, /* may not be passed by drive either */
__REQ_CMD, /* is a regular fs rw request */
@@ -210,6 +211,7 @@ enum rq_flag_bits {
__REQ_STARTED, /* drive already may have started this one */
__REQ_DONTPREP, /* don't call prep for this one */
__REQ_QUEUED, /* uses queueing */
+ __REQ_ELVPRIV, /* elevator private data attached */
/*
* for ATA/ATAPI devices
*/
@@ -235,6 +237,7 @@ enum rq_flag_bits {
#define REQ_RW (1 << __REQ_RW)
#define REQ_FAILFAST (1 << __REQ_FAILFAST)
+#define REQ_SORTED (1 << __REQ_SORTED)
#define REQ_SOFTBARRIER (1 << __REQ_SOFTBARRIER)
#define REQ_HARDBARRIER (1 << __REQ_HARDBARRIER)
#define REQ_CMD (1 << __REQ_CMD)
@@ -242,6 +245,7 @@ enum rq_flag_bits {
#define REQ_STARTED (1 << __REQ_STARTED)
#define REQ_DONTPREP (1 << __REQ_DONTPREP)
#define REQ_QUEUED (1 << __REQ_QUEUED)
+#define REQ_ELVPRIV (1 << __REQ_ELVPRIV)
#define REQ_PC (1 << __REQ_PC)
#define REQ_BLOCK_PC (1 << __REQ_BLOCK_PC)
#define REQ_SENSE (1 << __REQ_SENSE)
@@ -333,6 +337,12 @@ struct request_queue
end_flush_fn *end_flush_fn;
/*
+ * Dispatch queue sorting
+ */
+ sector_t end_sector;
+ struct request *boundary_rq;
+
+ /*
* Auto-unplugging state
*/
struct timer_list unplug_timer;
@@ -354,7 +364,7 @@ struct request_queue
* queue needs bounce pages for pages above this limit
*/
unsigned long bounce_pfn;
- unsigned int bounce_gfp;
+ gfp_t bounce_gfp;
/*
* various queue flags, see QUEUE_* below
@@ -396,6 +406,7 @@ struct request_queue
atomic_t refcnt;
+ unsigned int nr_sorted;
unsigned int in_flight;
/*
@@ -405,8 +416,6 @@ struct request_queue
unsigned int sg_reserved_size;
int node;
- struct list_head drain_list;
-
/*
* reserved for flush operations
*/
@@ -434,7 +443,7 @@ enum {
#define QUEUE_FLAG_DEAD 5 /* queue being torn down */
#define QUEUE_FLAG_REENTER 6 /* Re-entrancy avoidance */
#define QUEUE_FLAG_PLUGGED 7 /* queue is plugged */
-#define QUEUE_FLAG_DRAIN 8 /* draining queue for sched switch */
+#define QUEUE_FLAG_ELVSWITCH 8 /* don't use elevator, just do FIFO */
#define QUEUE_FLAG_FLUSH 9 /* doing barrier flush sequence */
#define blk_queue_plugged(q) test_bit(QUEUE_FLAG_PLUGGED, &(q)->queue_flags)
@@ -454,6 +463,7 @@ enum {
#define blk_pm_request(rq) \
((rq)->flags & (REQ_PM_SUSPEND | REQ_PM_RESUME))
+#define blk_sorted_rq(rq) ((rq)->flags & REQ_SORTED)
#define blk_barrier_rq(rq) ((rq)->flags & REQ_HARDBARRIER)
#define blk_barrier_preflush(rq) ((rq)->flags & REQ_BAR_PREFLUSH)
#define blk_barrier_postflush(rq) ((rq)->flags & REQ_BAR_POSTFLUSH)
@@ -550,7 +560,7 @@ extern void generic_make_request(struct bio *bio);
extern void blk_put_request(struct request *);
extern void blk_end_sync_rq(struct request *rq);
extern void blk_attempt_remerge(request_queue_t *, struct request *);
-extern struct request *blk_get_request(request_queue_t *, int, int);
+extern struct request *blk_get_request(request_queue_t *, int, gfp_t);
extern void blk_insert_request(request_queue_t *, struct request *, int, void *);
extern void blk_requeue_request(request_queue_t *, struct request *);
extern void blk_plug_device(request_queue_t *);
@@ -565,7 +575,7 @@ extern void blk_run_queue(request_queue_t *);
extern void blk_queue_activity_fn(request_queue_t *, activity_fn *, void *);
extern int blk_rq_map_user(request_queue_t *, struct request *, void __user *, unsigned int);
extern int blk_rq_unmap_user(struct bio *, unsigned int);
-extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, unsigned int);
+extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, gfp_t);
extern int blk_rq_map_user_iov(request_queue_t *, struct request *, struct sg_iovec *, int);
extern int blk_execute_rq(request_queue_t *, struct gendisk *,
struct request *, int);
@@ -611,12 +621,22 @@ extern void end_request(struct request *req, int uptodate);
static inline void blkdev_dequeue_request(struct request *req)
{
- BUG_ON(list_empty(&req->queuelist));
+ elv_dequeue_request(req->q, req);
+}
- list_del_init(&req->queuelist);
+/*
+ * This should be in elevator.h, but that requires pulling in rq and q
+ */
+static inline void elv_dispatch_add_tail(struct request_queue *q,
+ struct request *rq)
+{
+ if (q->last_merge == rq)
+ q->last_merge = NULL;
+ q->nr_sorted--;
- if (req->rl)
- elv_remove_request(req->q, req);
+ q->end_sector = rq_end_sector(rq);
+ q->boundary_rq = rq;
+ list_add_tail(&rq->queuelist, &q->queue_head);
}
/*
@@ -650,12 +670,10 @@ extern void blk_dump_rq_flags(struct request *, char *);
extern void generic_unplug_device(request_queue_t *);
extern void __generic_unplug_device(request_queue_t *);
extern long nr_blockdev_pages(void);
-extern void blk_wait_queue_drained(request_queue_t *, int);
-extern void blk_finish_queue_drain(request_queue_t *);
int blk_get_queue(request_queue_t *);
-request_queue_t *blk_alloc_queue(int gfp_mask);
-request_queue_t *blk_alloc_queue_node(int,int);
+request_queue_t *blk_alloc_queue(gfp_t);
+request_queue_t *blk_alloc_queue_node(gfp_t, int);
#define blk_put_queue(q) blk_cleanup_queue((q))
/*
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-17 01:27:41 +0000