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Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Enhanced partition statistics: documentation update
  Enhanced partition statistics: remove old partition statistics
  Enhanced partition statistics: procfs
  Enhanced partition statistics: sysfs
  Enhanced partition statistics: aoe fix
  Enhanced partition statistics: update partition statitics
  Enhanced partition statistics: core statistics
  block: fixup rq_init() a bit

Manually fixed conflict in drivers/block/aoe/aoecmd.c due to statistics
support.
This commit is contained in:
Linus Torvalds
2008-02-08 09:42:46 -08:00
parent b5eb9513f7 0e53c2be04
commit 03054de1e0
10 changed files with 320 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/blkdev.h
View File

@@ -137,7 +137,9 @@ enum rq_flag_bits {
#define BLK_MAX_CDB 16
/*
* try to put the fields that are referenced together in the same cacheline
* try to put the fields that are referenced together in the same cacheline.
* if you modify this structure, be sure to check block/blk-core.c:rq_init()
* as well!
*/
struct request {
struct list_head queuelist;

153
include/linux/genhd.h
View File

@@ -91,15 +91,30 @@ struct partition {
__le32 nr_sects; /* nr of sectors in partition */
} __attribute__((packed));
struct disk_stats {
unsigned long sectors[2]; /* READs and WRITEs */
unsigned long ios[2];
unsigned long merges[2];
unsigned long ticks[2];
unsigned long io_ticks;
unsigned long time_in_queue;
};
struct hd_struct {
sector_t start_sect;
sector_t nr_sects;
struct device dev;
struct kobject *holder_dir;
unsigned ios[2], sectors[2]; /* READs and WRITEs */
int policy, partno;
#ifdef CONFIG_FAIL_MAKE_REQUEST
int make_it_fail;
#endif
unsigned long stamp;
int in_flight;
#ifdef CONFIG_SMP
struct disk_stats *dkstats;
#else
struct disk_stats dkstats;
#endif
};
@@ -111,15 +126,7 @@ struct hd_struct {
#define GENHD_FL_SUPPRESS_PARTITION_INFO 32
#define GENHD_FL_FAIL 64
struct disk_stats {
unsigned long sectors[2]; /* READs and WRITEs */
unsigned long ios[2];
unsigned long merges[2];
unsigned long ticks[2];
unsigned long io_ticks;
unsigned long time_in_queue;
};
struct gendisk {
int major; /* major number of driver */
int first_minor;
@@ -158,6 +165,20 @@ struct gendisk {
* The __ variants should only be called in critical sections. The full
* variants disable/enable preemption.
*/
static inline struct hd_struct *get_part(struct gendisk *gendiskp,
sector_t sector)
{
struct hd_struct *part;
int i;
for (i = 0; i < gendiskp->minors - 1; i++) {
part = gendiskp->part[i];
if (part && part->start_sect <= sector
&& sector < part->start_sect + part->nr_sects)
return part;
}
return NULL;
}
#ifdef CONFIG_SMP
#define __disk_stat_add(gendiskp, field, addnd) \
(per_cpu_ptr(gendiskp->dkstats, smp_processor_id())->field += addnd)
@@ -177,15 +198,62 @@ static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) {
memset(per_cpu_ptr(gendiskp->dkstats, i), value,
sizeof (struct disk_stats));
}
#define __part_stat_add(part, field, addnd) \
(per_cpu_ptr(part->dkstats, smp_processor_id())->field += addnd)
#define __all_stat_add(gendiskp, field, addnd, sector) \
({ \
struct hd_struct *part = get_part(gendiskp, sector); \
if (part) \
__part_stat_add(part, field, addnd); \
__disk_stat_add(gendiskp, field, addnd); \
})
#define part_stat_read(part, field) \
({ \
typeof(part->dkstats->field) res = 0; \
int i; \
for_each_possible_cpu(i) \
res += per_cpu_ptr(part->dkstats, i)->field; \
res; \
})
static inline void part_stat_set_all(struct hd_struct *part, int value) {
int i;
for_each_possible_cpu(i)
memset(per_cpu_ptr(part->dkstats, i), value,
sizeof(struct disk_stats));
}
#else
#define __disk_stat_add(gendiskp, field, addnd) \
(gendiskp->dkstats.field += addnd)
#define disk_stat_read(gendiskp, field) (gendiskp->dkstats.field)
static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) {
static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)
{
memset(&gendiskp->dkstats, value, sizeof (struct disk_stats));
}
#define __part_stat_add(part, field, addnd) \
(part->dkstats.field += addnd)
#define __all_stat_add(gendiskp, field, addnd, sector) \
({ \
struct hd_struct *part = get_part(gendiskp, sector); \
if (part) \
part->dkstats.field += addnd; \
__disk_stat_add(gendiskp, field, addnd); \
})
#define part_stat_read(part, field) (part->dkstats.field)
static inline void part_stat_set_all(struct hd_struct *part, int value)
{
memset(&part->dkstats, value, sizeof(struct disk_stats));
}
#endif
#define disk_stat_add(gendiskp, field, addnd) \
@@ -206,6 +274,45 @@ static inline void disk_stat_set_all(struct gendisk *gendiskp, int value) {
#define disk_stat_sub(gendiskp, field, subnd) \
disk_stat_add(gendiskp, field, -subnd)
#define part_stat_add(gendiskp, field, addnd) \
do { \
preempt_disable(); \
__part_stat_add(gendiskp, field, addnd);\
preempt_enable(); \
} while (0)
#define __part_stat_dec(gendiskp, field) __part_stat_add(gendiskp, field, -1)
#define part_stat_dec(gendiskp, field) part_stat_add(gendiskp, field, -1)
#define __part_stat_inc(gendiskp, field) __part_stat_add(gendiskp, field, 1)
#define part_stat_inc(gendiskp, field) part_stat_add(gendiskp, field, 1)
#define __part_stat_sub(gendiskp, field, subnd) \
__part_stat_add(gendiskp, field, -subnd)
#define part_stat_sub(gendiskp, field, subnd) \
part_stat_add(gendiskp, field, -subnd)
#define all_stat_add(gendiskp, field, addnd, sector) \
do { \
preempt_disable(); \
__all_stat_add(gendiskp, field, addnd, sector); \
preempt_enable(); \
} while (0)
#define __all_stat_dec(gendiskp, field, sector) \
__all_stat_add(gendiskp, field, -1, sector)
#define all_stat_dec(gendiskp, field, sector) \
all_stat_add(gendiskp, field, -1, sector)
#define __all_stat_inc(gendiskp, field, sector) \
__all_stat_add(gendiskp, field, 1, sector)
#define all_stat_inc(gendiskp, field, sector) \
all_stat_add(gendiskp, field, 1, sector)
#define __all_stat_sub(gendiskp, field, subnd, sector) \
__all_stat_add(gendiskp, field, -subnd, sector)
#define all_stat_sub(gendiskp, field, subnd, sector) \
all_stat_add(gendiskp, field, -subnd, sector)
/* Inlines to alloc and free disk stats in struct gendisk */
#ifdef CONFIG_SMP
@@ -221,6 +328,20 @@ static inline void free_disk_stats(struct gendisk *disk)
{
free_percpu(disk->dkstats);
}
static inline int init_part_stats(struct hd_struct *part)
{
part->dkstats = alloc_percpu(struct disk_stats);
if (!part->dkstats)
return 0;
return 1;
}
static inline void free_part_stats(struct hd_struct *part)
{
free_percpu(part->dkstats);
}
#else /* CONFIG_SMP */
static inline int init_disk_stats(struct gendisk *disk)
{
@@ -230,10 +351,20 @@ static inline int init_disk_stats(struct gendisk *disk)
static inline void free_disk_stats(struct gendisk *disk)
{
}
static inline int init_part_stats(struct hd_struct *part)
{
return 1;
}
static inline void free_part_stats(struct hd_struct *part)
{
}
#endif /* CONFIG_SMP */
/* drivers/block/ll_rw_blk.c */
extern void disk_round_stats(struct gendisk *disk);
extern void part_round_stats(struct hd_struct *part);
/* drivers/block/genhd.c */
extern int get_blkdev_list(char *, int);