From 7996a3d79d55b7f879dfd62e202bbfe2963718d3 Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Sat, 27 Jul 2013 22:15:01 +0000 Subject: really properly move files --- .../contrib/include/linux/task_io_accounting.h | 45 ++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 libdde-linux26/contrib/include/linux/task_io_accounting.h (limited to 'libdde-linux26/contrib/include/linux/task_io_accounting.h') diff --git a/libdde-linux26/contrib/include/linux/task_io_accounting.h b/libdde-linux26/contrib/include/linux/task_io_accounting.h new file mode 100644 index 00000000..bdf855c2 --- /dev/null +++ b/libdde-linux26/contrib/include/linux/task_io_accounting.h @@ -0,0 +1,45 @@ +/* + * task_io_accounting: a structure which is used for recording a single task's + * IO statistics. + * + * Don't include this header file directly - it is designed to be dragged in via + * sched.h. + * + * Blame Andrew Morton for all this. + */ + +struct task_io_accounting { +#ifdef CONFIG_TASK_XACCT + /* bytes read */ + u64 rchar; + /* bytes written */ + u64 wchar; + /* # of read syscalls */ + u64 syscr; + /* # of write syscalls */ + u64 syscw; +#endif /* CONFIG_TASK_XACCT */ + +#ifdef CONFIG_TASK_IO_ACCOUNTING + /* + * The number of bytes which this task has caused to be read from + * storage. + */ + u64 read_bytes; + + /* + * The number of bytes which this task has caused, or shall cause to be + * written to disk. + */ + u64 write_bytes; + + /* + * A task can cause "negative" IO too. If this task truncates some + * dirty pagecache, some IO which another task has been accounted for + * (in its write_bytes) will not be happening. We _could_ just + * subtract that from the truncating task's write_bytes, but there is + * information loss in doing that. + */ + u64 cancelled_write_bytes; +#endif /* CONFIG_TASK_IO_ACCOUNTING */ +}; -- cgit v1.2.3