diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/blkdev.h | 81 | ||||
| -rw-r--r-- | include/linux/init_task.h | 1 | ||||
| -rw-r--r-- | include/linux/iocontext.h | 79 | ||||
| -rw-r--r-- | include/linux/ioprio.h | 13 | ||||
| -rw-r--r-- | include/linux/sched.h | 1 |
5 files changed, 93 insertions, 82 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 49b7a4c31a6d..510a18ba1ec5 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -34,83 +34,10 @@ struct sg_io_hdr; #define BLKDEV_MIN_RQ 4 #define BLKDEV_MAX_RQ 128 /* Default maximum */ -/* - * This is the per-process anticipatory I/O scheduler state. - */ -struct as_io_context { - spinlock_t lock; - - void (*dtor)(struct as_io_context *aic); /* destructor */ - void (*exit)(struct as_io_context *aic); /* called on task exit */ - - unsigned long state; - atomic_t nr_queued; /* queued reads & sync writes */ - atomic_t nr_dispatched; /* number of requests gone to the drivers */ - - /* IO History tracking */ - /* Thinktime */ - unsigned long last_end_request; - unsigned long ttime_total; - unsigned long ttime_samples; - unsigned long ttime_mean; - /* Layout pattern */ - unsigned int seek_samples; - sector_t last_request_pos; - u64 seek_total; - sector_t seek_mean; -}; - -struct cfq_queue; -struct cfq_io_context { - struct rb_node rb_node; - void *key; - - struct cfq_queue *cfqq[2]; - - struct io_context *ioc; - - unsigned long last_end_request; - sector_t last_request_pos; - - unsigned long ttime_total; - unsigned long ttime_samples; - unsigned long ttime_mean; - - unsigned int seek_samples; - u64 seek_total; - sector_t seek_mean; - - struct list_head queue_list; - - void (*dtor)(struct io_context *); /* destructor */ - void (*exit)(struct io_context *); /* called on task exit */ -}; - -/* - * This is the per-process I/O subsystem state. It is refcounted and - * kmalloc'ed. Currently all fields are modified in process io context - * (apart from the atomic refcount), so require no locking. - */ -struct io_context { - atomic_t refcount; - struct task_struct *task; - - unsigned int ioprio_changed; - - /* - * For request batching - */ - unsigned long last_waited; /* Time last woken after wait for request */ - int nr_batch_requests; /* Number of requests left in the batch */ - - struct as_io_context *aic; - struct rb_root cic_root; - void *ioc_data; -}; - void put_io_context(struct io_context *ioc); void exit_io_context(void); struct io_context *get_io_context(gfp_t gfp_flags, int node); +struct io_context *alloc_io_context(gfp_t gfp_flags, int node); void copy_io_context(struct io_context **pdst, struct io_context **psrc); void swap_io_context(struct io_context **ioc1, struct io_context **ioc2); @@ -894,6 +821,12 @@ static inline void exit_io_context(void) { } +static inline int put_io_context(struct io_context *ioc) +{ + return 1; +} + + #endif /* CONFIG_BLOCK */ #endif diff --git a/include/linux/init_task.h b/include/linux/init_task.h index 796019b22b6f..e6b3f7080679 100644 --- a/include/linux/init_task.h +++ b/include/linux/init_task.h @@ -137,7 +137,6 @@ extern struct group_info init_groups; .time_slice = HZ, \ .nr_cpus_allowed = NR_CPUS, \ }, \ - .ioprio = 0, \ .tasks = LIST_HEAD_INIT(tsk.tasks), \ .ptrace_children= LIST_HEAD_INIT(tsk.ptrace_children), \ .ptrace_list = LIST_HEAD_INIT(tsk.ptrace_list), \ diff --git a/include/linux/iocontext.h b/include/linux/iocontext.h new file mode 100644 index 000000000000..186807ea62e2 --- /dev/null +++ b/include/linux/iocontext.h @@ -0,0 +1,79 @@ +#ifndef IOCONTEXT_H +#define IOCONTEXT_H + +/* + * This is the per-process anticipatory I/O scheduler state. + */ +struct as_io_context { + spinlock_t lock; + + void (*dtor)(struct as_io_context *aic); /* destructor */ + void (*exit)(struct as_io_context *aic); /* called on task exit */ + + unsigned long state; + atomic_t nr_queued; /* queued reads & sync writes */ + atomic_t nr_dispatched; /* number of requests gone to the drivers */ + + /* IO History tracking */ + /* Thinktime */ + unsigned long last_end_request; + unsigned long ttime_total; + unsigned long ttime_samples; + unsigned long ttime_mean; + /* Layout pattern */ + unsigned int seek_samples; + sector_t last_request_pos; + u64 seek_total; + sector_t seek_mean; +}; + +struct cfq_queue; +struct cfq_io_context { + struct rb_node rb_node; + void *key; + + struct cfq_queue *cfqq[2]; + + struct io_context *ioc; + + unsigned long last_end_request; + sector_t last_request_pos; + + unsigned long ttime_total; + unsigned long ttime_samples; + unsigned long ttime_mean; + + unsigned int seek_samples; + u64 seek_total; + sector_t seek_mean; + + struct list_head queue_list; + + void (*dtor)(struct io_context *); /* destructor */ + void (*exit)(struct io_context *); /* called on task exit */ +}; + +/* + * This is the per-process I/O subsystem state. It is refcounted and + * kmalloc'ed. Currently all fields are modified in process io context + * (apart from the atomic refcount), so require no locking. + */ +struct io_context { + atomic_t refcount; + struct task_struct *task; + + unsigned short ioprio; + unsigned short ioprio_changed; + + /* + * For request batching + */ + unsigned long last_waited; /* Time last woken after wait for request */ + int nr_batch_requests; /* Number of requests left in the batch */ + + struct as_io_context *aic; + struct rb_root cic_root; + void *ioc_data; +}; + +#endif diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h index baf29387cab4..2a3bb1bb7433 100644 --- a/include/linux/ioprio.h +++ b/include/linux/ioprio.h @@ -2,6 +2,7 @@ #define IOPRIO_H #include <linux/sched.h> +#include <linux/iocontext.h> /* * Gives us 8 prio classes with 13-bits of data for each class @@ -45,18 +46,18 @@ enum { * the cpu scheduler nice value to an io priority */ #define IOPRIO_NORM (4) -static inline int task_ioprio(struct task_struct *task) +static inline int task_ioprio(struct io_context *ioc) { - if (ioprio_valid(task->ioprio)) - return IOPRIO_PRIO_DATA(task->ioprio); + if (ioprio_valid(ioc->ioprio)) + return IOPRIO_PRIO_DATA(ioc->ioprio); return IOPRIO_NORM; } -static inline int task_ioprio_class(struct task_struct *task) +static inline int task_ioprio_class(struct io_context *ioc) { - if (ioprio_valid(task->ioprio)) - return IOPRIO_PRIO_CLASS(task->ioprio); + if (ioprio_valid(ioc->ioprio)) + return IOPRIO_PRIO_CLASS(ioc->ioprio); return IOPRIO_CLASS_BE; } diff --git a/include/linux/sched.h b/include/linux/sched.h index df5b24ee80b3..80837e7d527e 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -975,7 +975,6 @@ struct task_struct { struct hlist_head preempt_notifiers; #endif - unsigned short ioprio; /* * fpu_counter contains the number of consecutive context switches * that the FPU is used. If this is over a threshold, the lazy fpu |