Messages in this thread Patch in this message | | | Subject | [Patch 3/9] Block I/O accounting initialization | From | Shailabh Nagar <> | Date | Mon, 13 Mar 2006 19:47:02 -0500 |
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delayacct-blkio-init.patch
Setup variables and functions to collect per-task block I/O delays.
Separating the collection part to a later patch for easier review and discussion.
Signed-off-by: Shailabh Nagar <nagar@watson.ibm.com>
include/linux/delayacct.h | 16 ++++++++++++++++ include/linux/sched.h | 4 ++++ kernel/delayacct.c | 14 ++++++++++++++ 3 files changed, 34 insertions(+)
Index: linux-2.6.16-rc5/include/linux/delayacct.h =================================================================== --- linux-2.6.16-rc5.orig/include/linux/delayacct.h 2006-03-11 07:41:37.000000000 -0500 +++ linux-2.6.16-rc5/include/linux/delayacct.h 2006-03-11 07:41:38.000000000 -0500 @@ -22,6 +22,8 @@ extern kmem_cache_t *delayacct_cache; extern int delayacct_init(void); extern void __delayacct_tsk_init(struct task_struct *); extern void __delayacct_tsk_exit(struct task_struct *); +extern void __delayacct_blkio_start(void); +extern void __delayacct_blkio_end(void); static inline void delayacct_tsk_init(struct task_struct *tsk) { @@ -37,6 +39,16 @@ static inline void delayacct_tsk_exit(st __delayacct_tsk_exit(tsk); } +static inline void delayacct_blkio_start(void) +{ + if (unlikely(delayacct_on)) + __delayacct_blkio_start(); +} +static inline void delayacct_blkio_end(void) +{ + if (unlikely(delayacct_on)) + __delayacct_blkio_end(); +} #else static inline int delayacct_init(void) {} @@ -44,5 +56,9 @@ static inline void delayacct_tsk_init(st {} static inline void delayacct_tsk_exit(struct task_struct *tsk) {} +static inline void delayacct_blkio_start(void) +{} +static inline void delayacct_blkio_end(void) +{} #endif /* CONFIG_TASK_DELAY_ACCT */ #endif /* _LINUX_TASKDELAYS_H */ Index: linux-2.6.16-rc5/kernel/delayacct.c =================================================================== --- linux-2.6.16-rc5.orig/kernel/delayacct.c 2006-03-11 07:41:37.000000000 -0500 +++ linux-2.6.16-rc5/kernel/delayacct.c 2006-03-11 07:41:38.000000000 -0500 @@ -90,3 +90,17 @@ static inline void delayacct_end(struct spin_unlock(¤t->delays->lock); } +void __delayacct_blkio_start(void) +{ + if (current->delays) + delayacct_start(¤t->delays->blkio_start); +} + +void __delayacct_blkio_end(void) +{ + if (current->delays) + delayacct_end(¤t->delays->blkio_start, + ¤t->delays->blkio_end, + ¤t->delays->blkio_delay, + ¤t->delays->blkio_count); +} Index: linux-2.6.16-rc5/include/linux/sched.h =================================================================== --- linux-2.6.16-rc5.orig/include/linux/sched.h 2006-03-11 07:41:37.000000000 -0500 +++ linux-2.6.16-rc5/include/linux/sched.h 2006-03-11 07:41:38.000000000 -0500 @@ -549,6 +549,10 @@ struct task_delay_info { * u64 XXX_delay; * u32 XXX_count; */ + + struct timespec blkio_start, blkio_end; + u64 blkio_delay; /* wait for sync block io completion */ + u32 blkio_count; }; #endif
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