diff options
| -rw-r--r-- | fs/proc/base.c | 4 | ||||
| -rw-r--r-- | fs/read_write.c | 24 | ||||
| -rw-r--r-- | include/linux/sched.h | 40 | ||||
| -rw-r--r-- | kernel/fork.c | 2 |
4 files changed, 58 insertions, 12 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 1a979ea3b37..7fb37d6f286 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1810,17 +1810,21 @@ static int proc_base_fill_cache(struct file *filp, void *dirent, filldir_t filld static int proc_pid_io_accounting(struct task_struct *task, char *buffer) { return sprintf(buffer, +#ifdef CONFIG_TASK_XACCT "rchar: %llu\n" "wchar: %llu\n" "syscr: %llu\n" "syscw: %llu\n" +#endif "read_bytes: %llu\n" "write_bytes: %llu\n" "cancelled_write_bytes: %llu\n", +#ifdef CONFIG_TASK_XACCT (unsigned long long)task->rchar, (unsigned long long)task->wchar, (unsigned long long)task->syscr, (unsigned long long)task->syscw, +#endif (unsigned long long)task->ioac.read_bytes, (unsigned long long)task->ioac.write_bytes, (unsigned long long)task->ioac.cancelled_write_bytes); diff --git a/fs/read_write.c b/fs/read_write.c index 707ac21700d..bcb0ef2aae3 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -274,9 +274,9 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos) ret = do_sync_read(file, buf, count, pos); if (ret > 0) { fsnotify_access(file->f_path.dentry); - current->rchar += ret; + add_rchar(current, ret); } - current->syscr++; + inc_syscr(current); } } @@ -332,9 +332,9 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_ ret = do_sync_write(file, buf, count, pos); if (ret > 0) { fsnotify_modify(file->f_path.dentry); - current->wchar += ret; + add_wchar(current, ret); } - current->syscw++; + inc_syscw(current); } } @@ -675,8 +675,8 @@ sys_readv(unsigned long fd, const struct iovec __user *vec, unsigned long vlen) } if (ret > 0) - current->rchar += ret; - current->syscr++; + add_rchar(current, ret); + inc_syscr(current); return ret; } @@ -696,8 +696,8 @@ sys_writev(unsigned long fd, const struct iovec __user *vec, unsigned long vlen) } if (ret > 0) - current->wchar += ret; - current->syscw++; + add_wchar(current, ret); + inc_syscw(current); return ret; } @@ -779,12 +779,12 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, retval = in_file->f_op->sendfile(in_file, ppos, count, file_send_actor, out_file); if (retval > 0) { - current->rchar += retval; - current->wchar += retval; + add_rchar(current, retval); + add_wchar(current, retval); } - current->syscr++; - current->syscw++; + inc_syscr(current); + inc_syscw(current); if (*ppos > max) retval = -EOVERFLOW; diff --git a/include/linux/sched.h b/include/linux/sched.h index 44637353519..76c8e2dc48d 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1013,8 +1013,10 @@ struct task_struct { * to a stack based synchronous wait) if its doing sync IO. */ wait_queue_t *io_wait; +#ifdef CONFIG_TASK_XACCT /* i/o counters(bytes read/written, #syscalls */ u64 rchar, wchar, syscr, syscw; +#endif struct task_io_accounting ioac; #if defined(CONFIG_TASK_XACCT) u64 acct_rss_mem1; /* accumulated rss usage */ @@ -1649,6 +1651,44 @@ extern int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls); extern void normalize_rt_tasks(void); +#ifdef CONFIG_TASK_XACCT +static inline void add_rchar(struct task_struct *tsk, ssize_t amt) +{ + tsk->rchar += amt; +} + +static inline void add_wchar(struct task_struct *tsk, ssize_t amt) +{ + tsk->wchar += amt; +} + +static inline void inc_syscr(struct task_struct *tsk) +{ + tsk->syscr++; +} + +static inline void inc_syscw(struct task_struct *tsk) +{ + tsk->syscw++; +} +#else +static inline void add_rchar(struct task_struct *tsk, ssize_t amt) +{ +} + +static inline void add_wchar(struct task_struct *tsk, ssize_t amt) +{ +} + +static inline void inc_syscr(struct task_struct *tsk) +{ +} + +static inline void inc_syscw(struct task_struct *tsk) +{ +} +#endif + #endif /* __KERNEL__ */ #endif diff --git a/kernel/fork.c b/kernel/fork.c index d57118da73f..80284eb488c 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1038,10 +1038,12 @@ static struct task_struct *copy_process(unsigned long clone_flags, p->utime = cputime_zero; p->stime = cputime_zero; p->sched_time = 0; +#ifdef CONFIG_TASK_XACCT p->rchar = 0; /* I/O counter: bytes read */ p->wchar = 0; /* I/O counter: bytes written */ p->syscr = 0; /* I/O counter: read syscalls */ p->syscw = 0; /* I/O counter: write syscalls */ +#endif task_io_accounting_init(p); acct_clear_integrals(p); |