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Merge branch 'for-4.4/io-poll' of git://git.kernel.dk/linux-block

Browse source 
Pull block IO poll support from Jens Axboe:
 "Various groups have been doing experimentation around IO polling for
  (really) fast devices.  The code has been reviewed and has been
  sitting on the side for a few releases, but this is now good enough
  for coordinated benchmarking and further experimentation.

  Currently O_DIRECT sync read/write are supported.  A framework is in
  the works that allows scalable stats tracking so we can auto-tune
  this.  And we'll add libaio support as well soon.  Fow now, it's an
  opt-in feature for test purposes"

* 'for-4.4/io-poll' of git://git.kernel.dk/linux-block:
  direct-io: be sure to assign dio->bio_bdev for both paths
  directio: add block polling support
  NVMe: add blk polling support
  block: add block polling support
  blk-mq: return tag/queue combo in the make_request_fn handlers
  block: change ->make_request_fn() and users to return a queue cookie
This commit is contained in:
Linus Torvalds 2015-11-10 17:23:49 -08:00
commit 3419b45039
33 changed files with 286 additions and 90 deletions
Download patch file Download diff file Expand all files Collapse all files

5
drivers/block/brd.c
View file

@ -323,7 +323,7 @@ out:
return err;
}
static void brd_make_request(struct request_queue *q, struct bio *bio)
static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
struct brd_device *brd = bdev->bd_disk->private_data;
@ -358,9 +358,10 @@ static void brd_make_request(struct request_queue *q, struct bio *bio)
out:
bio_endio(bio);
return;
return BLK_QC_T_NONE;
io_error:
bio_io_error(bio);
return BLK_QC_T_NONE;
}
static int brd_rw_page(struct block_device *bdev, sector_t sector,

2
drivers/block/drbd/drbd_int.h
View file

@ -1448,7 +1448,7 @@ extern int proc_details;
/* drbd_req */
extern void do_submit(struct work_struct *ws);
extern void __drbd_make_request(struct drbd_device *, struct bio *, unsigned long);
extern void drbd_make_request(struct request_queue *q, struct bio *bio);
extern blk_qc_t drbd_make_request(struct request_queue *q, struct bio *bio);
extern int drbd_read_remote(struct drbd_device *device, struct drbd_request *req);
extern int is_valid_ar_handle(struct drbd_request *, sector_t);

3
drivers/block/drbd/drbd_req.c
View file

@ -1494,7 +1494,7 @@ void do_submit(struct work_struct *ws)
}
}
void drbd_make_request(struct request_queue *q, struct bio *bio)
blk_qc_t drbd_make_request(struct request_queue *q, struct bio *bio)
{
struct drbd_device *device = (struct drbd_device *) q->queuedata;
unsigned long start_jif;
@ -1510,6 +1510,7 @@ void drbd_make_request(struct request_queue *q, struct bio *bio)
inc_ap_bio(device);
__drbd_make_request(device, bio, start_jif);
return BLK_QC_T_NONE;
}
void request_timer_fn(unsigned long data)

3
drivers/block/null_blk.c
View file

@ -321,7 +321,7 @@ static struct nullb_queue *nullb_to_queue(struct nullb *nullb)
return &nullb->queues[index];
}
static void null_queue_bio(struct request_queue *q, struct bio *bio)
static blk_qc_t null_queue_bio(struct request_queue *q, struct bio *bio)
{
struct nullb *nullb = q->queuedata;
struct nullb_queue *nq = nullb_to_queue(nullb);
@ -331,6 +331,7 @@ static void null_queue_bio(struct request_queue *q, struct bio *bio)
cmd->bio = bio;
null_handle_cmd(cmd);
return BLK_QC_T_NONE;
}
static int null_rq_prep_fn(struct request_queue *q, struct request *req)

9
drivers/block/pktcdvd.c
View file

@ -2441,7 +2441,7 @@ static void pkt_make_request_write(struct request_queue *q, struct bio *bio)
}
}
static void pkt_make_request(struct request_queue *q, struct bio *bio)
static blk_qc_t pkt_make_request(struct request_queue *q, struct bio *bio)
{
struct pktcdvd_device *pd;
char b[BDEVNAME_SIZE];
@ -2467,7 +2467,7 @@ static void pkt_make_request(struct request_queue *q, struct bio *bio)
*/
if (bio_data_dir(bio) == READ) {
pkt_make_request_read(pd, bio);
return;
return BLK_QC_T_NONE;
}
if (!test_bit(PACKET_WRITABLE, &pd->flags)) {
@ -2499,13 +2499,12 @@ static void pkt_make_request(struct request_queue *q, struct bio *bio)
pkt_make_request_write(q, split);
} while (split != bio);
return;
return BLK_QC_T_NONE;
end_io:
bio_io_error(bio);
return BLK_QC_T_NONE;
}
static void pkt_init_queue(struct pktcdvd_device *pd)
{
struct request_queue *q = pd->disk->queue;

6
drivers/block/ps3vram.c
View file

@ -598,7 +598,7 @@ out:
return next;
}
static void ps3vram_make_request(struct request_queue *q, struct bio *bio)
static blk_qc_t ps3vram_make_request(struct request_queue *q, struct bio *bio)
{
struct ps3_system_bus_device *dev = q->queuedata;
struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
@ -614,11 +614,13 @@ static void ps3vram_make_request(struct request_queue *q, struct bio *bio)
spin_unlock_irq(&priv->lock);
if (busy)
return;
return BLK_QC_T_NONE;
do {
bio = ps3vram_do_bio(dev, bio);
} while (bio);
return BLK_QC_T_NONE;
}
static int ps3vram_probe(struct ps3_system_bus_device *dev)

5
drivers/block/rsxx/dev.c
View file

@ -145,7 +145,7 @@ static void bio_dma_done_cb(struct rsxx_cardinfo *card,
}
}
static void rsxx_make_request(struct request_queue *q, struct bio *bio)
static blk_qc_t rsxx_make_request(struct request_queue *q, struct bio *bio)
{
struct rsxx_cardinfo *card = q->queuedata;
struct rsxx_bio_meta *bio_meta;
@ -199,7 +199,7 @@ static void rsxx_make_request(struct request_queue *q, struct bio *bio)
if (st)
goto queue_err;
return;
return BLK_QC_T_NONE;
queue_err:
kmem_cache_free(bio_meta_pool, bio_meta);
@ -207,6 +207,7 @@ req_err:
if (st)
bio->bi_error = st;
bio_endio(bio);
return BLK_QC_T_NONE;
}
/*----------------- Device Setup -------------------*/

4
drivers/block/umem.c
View file

@ -524,7 +524,7 @@ static int mm_check_plugged(struct cardinfo *card)
return !!blk_check_plugged(mm_unplug, card, sizeof(struct blk_plug_cb));
}
static void mm_make_request(struct request_queue *q, struct bio *bio)
static blk_qc_t mm_make_request(struct request_queue *q, struct bio *bio)
{
struct cardinfo *card = q->queuedata;
pr_debug("mm_make_request %llu %u\n",
@ -541,7 +541,7 @@ static void mm_make_request(struct request_queue *q, struct bio *bio)
activate(card);
spin_unlock_irq(&card->lock);
return;
return BLK_QC_T_NONE;
}
static irqreturn_t mm_interrupt(int irq, void *__card)

5
drivers/block/zram/zram_drv.c
View file

@ -894,7 +894,7 @@ out:
/*
* Handler function for all zram I/O requests.
*/
static void zram_make_request(struct request_queue *queue, struct bio *bio)
static blk_qc_t zram_make_request(struct request_queue *queue, struct bio *bio)
{
struct zram *zram = queue->queuedata;
@ -911,11 +911,12 @@ static void zram_make_request(struct request_queue *queue, struct bio *bio)
__zram_make_request(zram, bio);
zram_meta_put(zram);
return;
return BLK_QC_T_NONE;
put_zram:
zram_meta_put(zram);
error:
bio_io_error(bio);
return BLK_QC_T_NONE;
}
static void zram_slot_free_notify(struct block_device *bdev,