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-rw-r--r--drivers/block/Kconfig.iosched28
-rw-r--r--drivers/block/aoe/aoecmd.c13
-rw-r--r--drivers/block/as-iosched.c2
-rw-r--r--drivers/block/cciss_scsi.c10
-rw-r--r--drivers/block/cfq-iosched.c26
-rw-r--r--drivers/block/elevator.c57
-rw-r--r--drivers/block/floppy.c2
-rw-r--r--drivers/block/genhd.c29
-rw-r--r--drivers/block/ll_rw_blk.c47
-rw-r--r--drivers/block/noop-iosched.c1
-rw-r--r--drivers/block/paride/paride.c1
-rw-r--r--drivers/block/paride/pf.c4
-rw-r--r--drivers/block/paride/pg.c2
-rw-r--r--drivers/block/paride/pt.c1
-rw-r--r--drivers/block/viodasd.c17
15 files changed, 128 insertions, 112 deletions
diff --git a/drivers/block/Kconfig.iosched b/drivers/block/Kconfig.iosched
index 6070a480600..5b90d2fa63b 100644
--- a/drivers/block/Kconfig.iosched
+++ b/drivers/block/Kconfig.iosched
@@ -38,4 +38,32 @@ config IOSCHED_CFQ
among all processes in the system. It should provide a fair
working environment, suitable for desktop systems.
+choice
+ prompt "Default I/O scheduler"
+ default DEFAULT_AS
+ help
+ Select the I/O scheduler which will be used by default for all
+ block devices.
+
+ config DEFAULT_AS
+ bool "Anticipatory" if IOSCHED_AS
+
+ config DEFAULT_DEADLINE
+ bool "Deadline" if IOSCHED_DEADLINE
+
+ config DEFAULT_CFQ
+ bool "CFQ" if IOSCHED_CFQ
+
+ config DEFAULT_NOOP
+ bool "No-op"
+
+endchoice
+
+config DEFAULT_IOSCHED
+ string
+ default "anticipatory" if DEFAULT_AS
+ default "deadline" if DEFAULT_DEADLINE
+ default "cfq" if DEFAULT_CFQ
+ default "noop" if DEFAULT_NOOP
+
endmenu
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 5c9c7c1a3d4..326ca3876b6 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -468,16 +468,11 @@ aoecmd_ata_rsp(struct sk_buff *skb)
unsigned long duration = jiffies - buf->start_time;
unsigned long n_sect = buf->bio->bi_size >> 9;
struct gendisk *disk = d->gd;
+ const int rw = bio_data_dir(buf->bio);
- if (bio_data_dir(buf->bio) == WRITE) {
- disk_stat_inc(disk, writes);
- disk_stat_add(disk, write_ticks, duration);
- disk_stat_add(disk, write_sectors, n_sect);
- } else {
- disk_stat_inc(disk, reads);
- disk_stat_add(disk, read_ticks, duration);
- disk_stat_add(disk, read_sectors, n_sect);
- }
+ disk_stat_inc(disk, ios[rw]);
+ disk_stat_add(disk, ticks[rw], duration);
+ disk_stat_add(disk, sectors[rw], n_sect);
disk_stat_add(disk, io_ticks, duration);
n = (buf->flags & BUFFL_FAIL) ? -EIO : 0;
bio_endio(buf->bio, buf->bio->bi_size, n);
diff --git a/drivers/block/as-iosched.c b/drivers/block/as-iosched.c
index 56417223481..c6744ff3829 100644
--- a/drivers/block/as-iosched.c
+++ b/drivers/block/as-iosched.c
@@ -1973,8 +1973,8 @@ static int __init as_init(void)
static void __exit as_exit(void)
{
- kmem_cache_destroy(arq_pool);
elv_unregister(&iosched_as);
+ kmem_cache_destroy(arq_pool);
}
module_init(as_init);
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index e183a3ef783..ec27976a57d 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -28,13 +28,17 @@
through the array controller. Note in particular, neither
physical nor logical disks are presented through the scsi layer. */
+#include <linux/timer.h>
+#include <linux/completion.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include <asm/atomic.h>
+
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
-#include <asm/atomic.h>
-#include <linux/timer.h>
-#include <linux/completion.h>
#include "cciss_scsi.h"
diff --git a/drivers/block/cfq-iosched.c b/drivers/block/cfq-iosched.c
index 94690e4d41e..ecacca9c877 100644
--- a/drivers/block/cfq-iosched.c
+++ b/drivers/block/cfq-iosched.c
@@ -2059,10 +2059,8 @@ static void cfq_put_cfqd(struct cfq_data *cfqd)
if (!atomic_dec_and_test(&cfqd->ref))
return;
- blk_put_queue(q);
-
cfq_shutdown_timer_wq(cfqd);
- q->elevator->elevator_data = NULL;
+ blk_put_queue(q);
mempool_destroy(cfqd->crq_pool);
kfree(cfqd->crq_hash);
@@ -2418,28 +2416,8 @@ static int __init cfq_init(void)
static void __exit cfq_exit(void)
{
- struct task_struct *g, *p;
- unsigned long flags;
-
- read_lock_irqsave(&tasklist_lock, flags);
-
- /*
- * iterate each process in the system, removing our io_context
- */
- do_each_thread(g, p) {
- struct io_context *ioc = p->io_context;
-
- if (ioc && ioc->cic) {
- ioc->cic->exit(ioc->cic);
- cfq_free_io_context(ioc->cic);
- ioc->cic = NULL;
- }
- } while_each_thread(g, p);
-
- read_unlock_irqrestore(&tasklist_lock, flags);
-
- cfq_slab_kill();
elv_unregister(&iosched_cfq);
+ cfq_slab_kill();
}
module_init(cfq_init);
diff --git a/drivers/block/elevator.c b/drivers/block/elevator.c
index 55621d5c577..d4a49a3df82 100644
--- a/drivers/block/elevator.c
+++ b/drivers/block/elevator.c
@@ -147,24 +147,17 @@ static void elevator_setup_default(void)
struct elevator_type *e;
/*
- * check if default is set and exists
+ * If default has not been set, use the compiled-in selection.
*/
- if (chosen_elevator[0] && (e = elevator_get(chosen_elevator))) {
- elevator_put(e);
- return;
- }
+ if (!chosen_elevator[0])
+ strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED);
-#if defined(CONFIG_IOSCHED_AS)
- strcpy(chosen_elevator, "anticipatory");
-#elif defined(CONFIG_IOSCHED_DEADLINE)
- strcpy(chosen_elevator, "deadline");
-#elif defined(CONFIG_IOSCHED_CFQ)
- strcpy(chosen_elevator, "cfq");
-#elif defined(CONFIG_IOSCHED_NOOP)
- strcpy(chosen_elevator, "noop");
-#else
-#error "You must build at least 1 IO scheduler into the kernel"
-#endif
+ /*
+ * If the given scheduler is not available, fall back to no-op.
+ */
+ if (!(e = elevator_find(chosen_elevator)))
+ strcpy(chosen_elevator, "noop");
+ elevator_put(e);
}
static int __init elevator_setup(char *str)
@@ -376,9 +369,14 @@ void __elv_add_request(request_queue_t *q, struct request *rq, int where,
case ELEVATOR_INSERT_SORT:
BUG_ON(!blk_fs_request(rq));
rq->flags |= REQ_SORTED;
- q->elevator->ops->elevator_add_req_fn(q, rq);
if (q->last_merge == NULL && rq_mergeable(rq))
q->last_merge = rq;
+ /*
+ * Some ioscheds (cfq) run q->request_fn directly, so
+ * rq cannot be accessed after calling
+ * elevator_add_req_fn.
+ */
+ q->elevator->ops->elevator_add_req_fn(q, rq);
break;
default:
@@ -642,6 +640,27 @@ EXPORT_SYMBOL_GPL(elv_register);
void elv_unregister(struct elevator_type *e)
{
+ struct task_struct *g, *p;
+
+ /*
+ * Iterate every thread in the process to remove the io contexts.
+ */
+ read_lock(&tasklist_lock);
+ do_each_thread(g, p) {
+ struct io_context *ioc = p->io_context;
+ if (ioc && ioc->cic) {
+ ioc->cic->exit(ioc->cic);
+ ioc->cic->dtor(ioc->cic);
+ ioc->cic = NULL;
+ }
+ if (ioc && ioc->aic) {
+ ioc->aic->exit(ioc->aic);
+ ioc->aic->dtor(ioc->aic);
+ ioc->aic = NULL;
+ }
+ } while_each_thread(g, p);
+ read_unlock(&tasklist_lock);
+
spin_lock_irq(&elv_list_lock);
list_del_init(&e->list);
spin_unlock_irq(&elv_list_lock);
@@ -739,8 +758,10 @@ ssize_t elv_iosched_store(request_queue_t *q, const char *name, size_t count)
return -EINVAL;
}
- if (!strcmp(elevator_name, q->elevator->elevator_type->elevator_name))
+ if (!strcmp(elevator_name, q->elevator->elevator_type->elevator_name)) {
+ elevator_put(e);
return count;
+ }
elevator_switch(q, e);
return count;
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 00895477155..5eadbb9d4d7 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -177,7 +177,7 @@ static int print_unex = 1;
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/devfs_fs_kernel.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/buffer_head.h> /* for invalidate_buffers() */
/*
diff --git a/drivers/block/genhd.c b/drivers/block/genhd.c
index 486ce1fdeb8..54aec4a1ae1 100644
--- a/drivers/block/genhd.c
+++ b/drivers/block/genhd.c
@@ -391,13 +391,12 @@ static ssize_t disk_stats_read(struct gendisk * disk, char *page)
"%8u %8u %8llu %8u "
"%8u %8u %8u"
"\n",
- disk_stat_read(disk, reads), disk_stat_read(disk, read_merges),
- (unsigned long long)disk_stat_read(disk, read_sectors),
- jiffies_to_msecs(disk_stat_read(disk, read_ticks)),
- disk_stat_read(disk, writes),
- disk_stat_read(disk, write_merges),
- (unsigned long long)disk_stat_read(disk, write_sectors),
- jiffies_to_msecs(disk_stat_read(disk, write_ticks)),
+ disk_stat_read(disk, ios[0]), disk_stat_read(disk, merges[0]),
+ (unsigned long long)disk_stat_read(disk, sectors[0]),
+ jiffies_to_msecs(disk_stat_read(disk, ticks[0])),
+ disk_stat_read(disk, ios[1]), disk_stat_read(disk, merges[1]),
+ (unsigned long long)disk_stat_read(disk, sectors[1]),
+ jiffies_to_msecs(disk_stat_read(disk, ticks[1])),
disk->in_flight,
jiffies_to_msecs(disk_stat_read(disk, io_ticks)),
jiffies_to_msecs(disk_stat_read(disk, time_in_queue)));
@@ -583,12 +582,12 @@ static int diskstats_show(struct seq_file *s, void *v)
preempt_enable();
seq_printf(s, "%4d %4d %s %u %u %llu %u %u %u %llu %u %u %u %u\n",
gp->major, n + gp->first_minor, disk_name(gp, n, buf),
- disk_stat_read(gp, reads), disk_stat_read(gp, read_merges),
- (unsigned long long)disk_stat_read(gp, read_sectors),
- jiffies_to_msecs(disk_stat_read(gp, read_ticks)),
- disk_stat_read(gp, writes), disk_stat_read(gp, write_merges),
- (unsigned long long)disk_stat_read(gp, write_sectors),
- jiffies_to_msecs(disk_stat_read(gp, write_ticks)),
+ disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]),
+ (unsigned long long)disk_stat_read(gp, sectors[0]),
+ jiffies_to_msecs(disk_stat_read(gp, ticks[0])),
+ disk_stat_read(gp, ios[1]), disk_stat_read(gp, merges[1]),
+ (unsigned long long)disk_stat_read(gp, sectors[1]),
+ jiffies_to_msecs(disk_stat_read(gp, ticks[1])),
gp->in_flight,
jiffies_to_msecs(disk_stat_read(gp, io_ticks)),
jiffies_to_msecs(disk_stat_read(gp, time_in_queue)));
@@ -601,8 +600,8 @@ static int diskstats_show(struct seq_file *s, void *v)
seq_printf(s, "%4d %4d %s %u %u %u %u\n",
gp->major, n + gp->first_minor + 1,
disk_name(gp, n + 1, buf),
- hd->reads, hd->read_sectors,
- hd->writes, hd->write_sectors);
+ hd->ios[0], hd->sectors[0],
+ hd->ios[1], hd->sectors[1]);
}
return 0;
diff --git a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
index 0af73512b9a..2747741677f 100644
--- a/drivers/block/ll_rw_blk.c
+++ b/drivers/block/ll_rw_blk.c
@@ -2387,16 +2387,9 @@ static void drive_stat_acct(struct request *rq, int nr_sectors, int new_io)
if (!blk_fs_request(rq) || !rq->rq_disk)
return;
- if (rw == READ) {
- __disk_stat_add(rq->rq_disk, read_sectors, nr_sectors);
- if (!new_io)
- __disk_stat_inc(rq->rq_disk, read_merges);
- } else if (rw == WRITE) {
- __disk_stat_add(rq->rq_disk, write_sectors, nr_sectors);
- if (!new_io)
- __disk_stat_inc(rq->rq_disk, write_merges);
- }
- if (new_io) {
+ if (!new_io) {
+ __disk_stat_inc(rq->rq_disk, merges[rw]);
+ } else {
disk_round_stats(rq->rq_disk);
rq->rq_disk->in_flight++;
}
@@ -2791,17 +2784,11 @@ static inline void blk_partition_remap(struct bio *bio)
if (bdev != bdev->bd_contains) {
struct hd_struct *p = bdev->bd_part;
+ const int rw = bio_data_dir(bio);
+
+ p->sectors[rw] += bio_sectors(bio);
+ p->ios[rw]++;
- switch (bio_data_dir(bio)) {
- case READ:
- p->read_sectors += bio_sectors(bio);
- p->reads++;
- break;
- case WRITE:
- p->write_sectors += bio_sectors(bio);
- p->writes++;
- break;
- }
bio->bi_sector += p->start_sect;
bio->bi_bdev = bdev->bd_contains;
}
@@ -3048,6 +3035,12 @@ static int __end_that_request_first(struct request *req, int uptodate,
(unsigned long long)req->sector);
}
+ if (blk_fs_request(req) && req->rq_disk) {
+ const int rw = rq_data_dir(req);
+
+ __disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9);
+ }
+
total_bytes = bio_nbytes = 0;
while ((bio = req->bio) != NULL) {
int nbytes;
@@ -3176,16 +3169,10 @@ void end_that_request_last(struct request *req)
if (disk && blk_fs_request(req)) {
unsigned long duration = jiffies - req->start_time;
- switch (rq_data_dir(req)) {
- case WRITE:
- __disk_stat_inc(disk, writes);
- __disk_stat_add(disk, write_ticks, duration);
- break;
- case READ:
- __disk_stat_inc(disk, reads);
- __disk_stat_add(disk, read_ticks, duration);
- break;
- }
+ const int rw = rq_data_dir(req);
+
+ __disk_stat_inc(disk, ios[rw]);
+ __disk_stat_add(disk, ticks[rw], duration);
disk_round_stats(disk);
disk->in_flight--;
}
diff --git a/drivers/block/noop-iosched.c b/drivers/block/noop-iosched.c
index f56b8edb06e..e54f006e7e6 100644
--- a/drivers/block/noop-iosched.c
+++ b/drivers/block/noop-iosched.c
@@ -9,6 +9,7 @@
static void elevator_noop_add_request(request_queue_t *q, struct request *rq)
{
+ rq->flags |= REQ_NOMERGE;
elv_dispatch_add_tail(q, rq);
}
diff --git a/drivers/block/paride/paride.c b/drivers/block/paride/paride.c
index 1fef136c0e4..ce94aa11f6a 100644
--- a/drivers/block/paride/paride.c
+++ b/drivers/block/paride/paride.c
@@ -29,6 +29,7 @@
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
+#include <linux/sched.h> /* TASK_* */
#ifdef CONFIG_PARPORT_MODULE
#define CONFIG_PARPORT
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c
index 94af920465b..e9746af29b9 100644
--- a/drivers/block/paride/pf.c
+++ b/drivers/block/paride/pf.c
@@ -807,10 +807,6 @@ static int pf_next_buf(void)
return 1;
spin_lock_irqsave(&pf_spin_lock, saved_flags);
pf_end_request(1);
- if (pf_req) {
- pf_count = pf_req->current_nr_sectors;
- pf_buf = pf_req->buffer;
- }
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
return 1;
}
diff --git a/drivers/block/paride/pg.c b/drivers/block/paride/pg.c
index 82f2d6d2eee..6f5df0fad70 100644
--- a/drivers/block/paride/pg.c
+++ b/drivers/block/paride/pg.c
@@ -162,6 +162,8 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
#include <linux/mtio.h>
#include <linux/pg.h>
#include <linux/device.h>
+#include <linux/sched.h> /* current, TASK_* */
+#include <linux/jiffies.h>
#include <asm/uaccess.h>
diff --git a/drivers/block/paride/pt.c b/drivers/block/paride/pt.c
index 686c9557345..715ae5dc88f 100644
--- a/drivers/block/paride/pt.c
+++ b/drivers/block/paride/pt.c
@@ -146,6 +146,7 @@ static int (*drives[4])[6] = {&drive0, &drive1, &drive2, &drive3};
#include <linux/slab.h>
#include <linux/mtio.h>
#include <linux/device.h>
+#include <linux/sched.h> /* current, TASK_*, schedule_timeout() */
#include <asm/uaccess.h>
diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
index e46ecd23b3a..2d518aa2720 100644
--- a/drivers/block/viodasd.c
+++ b/drivers/block/viodasd.c
@@ -45,10 +45,10 @@
#include <asm/uaccess.h>
#include <asm/vio.h>
-#include <asm/iSeries/HvTypes.h>
-#include <asm/iSeries/HvLpEvent.h>
-#include <asm/iSeries/HvLpConfig.h>
-#include <asm/iSeries/vio.h>
+#include <asm/iseries/hv_types.h>
+#include <asm/iseries/hv_lp_event.h>
+#include <asm/iseries/hv_lp_config.h>
+#include <asm/iseries/vio.h>
MODULE_DESCRIPTION("iSeries Virtual DASD");
MODULE_AUTHOR("Dave Boutcher");
@@ -778,13 +778,16 @@ static struct vio_device_id viodasd_device_table[] __devinitdata = {
{ "viodasd", "" },
{ "", "" }
};
-
MODULE_DEVICE_TABLE(vio, viodasd_device_table);
+
static struct vio_driver viodasd_driver = {
- .name = "viodasd",
.id_table = viodasd_device_table,
.probe = viodasd_probe,
- .remove = viodasd_remove
+ .remove = viodasd_remove,
+ .driver = {
+ .name = "viodasd",
+ .owner = THIS_MODULE,
+ }
};
/*
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-06 18:32:58 +0000