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Date: Mon, 28 Jul 2008 00:48:12 +0200
From: Andrea Righi <righi.andrea@...il.com>
To: torvalds@...ux-foundation.org
Cc: akpm@...ux-foundation.org, balbir@...ux.vnet.ibm.com,
matt@...ehost.com, linux-kernel@...r.kernel.org,
Andrea Righi <righi.andrea@...il.com>,
Oleg Nesterov <oleg@...sign.ru>
Subject: [PATCH 1/1] task IO accounting: move all IO statistics in struct task_io_accounting
Simplify the code of include/linux/task_io_accounting.h.
It is also more reasonable to have all the task i/o-related statistics in a
single struct (task_io_accounting).
Signed-off-by: Andrea Righi <righi.andrea@...il.com>
Signed-off-by: Oleg Nesterov <oleg@...sign.ru>
---
fs/proc/base.c | 10 +++---
include/linux/sched.h | 12 ++++----
include/linux/task_io_accounting.h | 17 +----------
include/linux/task_io_accounting_ops.h | 48 ++++++++++++++++----------------
kernel/tsacct.c | 14 ++++----
5 files changed, 44 insertions(+), 57 deletions(-)
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3d94906..01ed610 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2403,7 +2403,7 @@ static int proc_base_fill_cache(struct file *filp, void *dirent,
#ifdef CONFIG_TASK_IO_ACCOUNTING
static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
{
- struct proc_io_accounting acct = task->ioac;
+ struct task_io_accounting acct = task->ioac;
unsigned long flags;
if (whole && lock_task_sighand(task, &flags)) {
@@ -2423,10 +2423,10 @@ static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
"read_bytes: %llu\n"
"write_bytes: %llu\n"
"cancelled_write_bytes: %llu\n",
- acct.chr.rchar, acct.chr.wchar,
- acct.chr.syscr, acct.chr.syscw,
- acct.blk.read_bytes, acct.blk.write_bytes,
- acct.blk.cancelled_write_bytes);
+ acct.rchar, acct.wchar,
+ acct.syscr, acct.syscw,
+ acct.read_bytes, acct.write_bytes,
+ acct.cancelled_write_bytes);
}
static int proc_tid_io_accounting(struct task_struct *task, char *buffer)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 034c1ca..5270d44 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -505,7 +505,7 @@ struct signal_struct {
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
unsigned long inblock, oublock, cinblock, coublock;
- struct proc_io_accounting ioac;
+ struct task_io_accounting ioac;
/*
* Cumulative ns of scheduled CPU time for dead threads in the
@@ -1253,7 +1253,7 @@ struct task_struct {
unsigned long ptrace_message;
siginfo_t *last_siginfo; /* For ptrace use. */
- struct proc_io_accounting ioac;
+ struct task_io_accounting ioac;
#if defined(CONFIG_TASK_XACCT)
u64 acct_rss_mem1; /* accumulated rss usage */
u64 acct_vm_mem1; /* accumulated virtual memory usage */
@@ -2183,22 +2183,22 @@ extern long sched_group_rt_period(struct task_group *tg);
#ifdef CONFIG_TASK_XACCT
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
{
- tsk->ioac.chr.rchar += amt;
+ tsk->ioac.rchar += amt;
}
static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
{
- tsk->ioac.chr.wchar += amt;
+ tsk->ioac.wchar += amt;
}
static inline void inc_syscr(struct task_struct *tsk)
{
- tsk->ioac.chr.syscr++;
+ tsk->ioac.syscr++;
}
static inline void inc_syscw(struct task_struct *tsk)
{
- tsk->ioac.chr.syscw++;
+ tsk->ioac.syscw++;
}
#else
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
diff --git a/include/linux/task_io_accounting.h b/include/linux/task_io_accounting.h
index 165390f..5e88afc 100644
--- a/include/linux/task_io_accounting.h
+++ b/include/linux/task_io_accounting.h
@@ -1,5 +1,5 @@
/*
- * proc_io_accounting: a structure which is used for recording a single task's
+ * 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
@@ -8,8 +8,8 @@
* Blame akpm@...l.org for all this.
*/
+struct task_io_accounting {
#ifdef CONFIG_TASK_XACCT
-struct task_chr_io_accounting {
/* bytes read */
u64 rchar;
/* bytes written */
@@ -18,14 +18,9 @@ struct task_chr_io_accounting {
u64 syscr;
/* # of write syscalls */
u64 syscw;
-};
-#else /* CONFIG_TASK_XACCT */
-struct task_chr_io_accounting {
-};
#endif /* CONFIG_TASK_XACCT */
#ifdef CONFIG_TASK_IO_ACCOUNTING
-struct task_io_accounting {
/*
* The number of bytes which this task has caused to be read from
* storage.
@@ -46,13 +41,5 @@ struct task_io_accounting {
* information loss in doing that.
*/
u64 cancelled_write_bytes;
-};
-#else /* CONFIG_TASK_IO_ACCOUNTING */
-struct task_io_accounting {
-};
#endif /* CONFIG_TASK_IO_ACCOUNTING */
-
-struct proc_io_accounting {
- struct task_chr_io_accounting chr;
- struct task_io_accounting blk;
};
diff --git a/include/linux/task_io_accounting_ops.h b/include/linux/task_io_accounting_ops.h
index e6f958e..4d090f9 100644
--- a/include/linux/task_io_accounting_ops.h
+++ b/include/linux/task_io_accounting_ops.h
@@ -9,7 +9,7 @@
#ifdef CONFIG_TASK_IO_ACCOUNTING
static inline void task_io_account_read(size_t bytes)
{
- current->ioac.blk.read_bytes += bytes;
+ current->ioac.read_bytes += bytes;
}
/*
@@ -18,12 +18,12 @@ static inline void task_io_account_read(size_t bytes)
*/
static inline unsigned long task_io_get_inblock(const struct task_struct *p)
{
- return p->ioac.blk.read_bytes >> 9;
+ return p->ioac.read_bytes >> 9;
}
static inline void task_io_account_write(size_t bytes)
{
- current->ioac.blk.write_bytes += bytes;
+ current->ioac.write_bytes += bytes;
}
/*
@@ -32,25 +32,25 @@ static inline void task_io_account_write(size_t bytes)
*/
static inline unsigned long task_io_get_oublock(const struct task_struct *p)
{
- return p->ioac.blk.write_bytes >> 9;
+ return p->ioac.write_bytes >> 9;
}
static inline void task_io_account_cancelled_write(size_t bytes)
{
- current->ioac.blk.cancelled_write_bytes += bytes;
+ current->ioac.cancelled_write_bytes += bytes;
}
-static inline void task_io_accounting_init(struct proc_io_accounting *ioac)
+static inline void task_io_accounting_init(struct task_io_accounting *ioac)
{
memset(ioac, 0, sizeof(*ioac));
}
-static inline void task_blk_io_accounting_add(struct proc_io_accounting *dst,
- struct proc_io_accounting *src)
+static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
+ struct task_io_accounting *src)
{
- dst->blk.read_bytes += src->blk.read_bytes;
- dst->blk.write_bytes += src->blk.write_bytes;
- dst->blk.cancelled_write_bytes += src->blk.cancelled_write_bytes;
+ dst->read_bytes += src->read_bytes;
+ dst->write_bytes += src->write_bytes;
+ dst->cancelled_write_bytes += src->cancelled_write_bytes;
}
#else
@@ -77,35 +77,35 @@ static inline void task_io_account_cancelled_write(size_t bytes)
{
}
-static inline void task_io_accounting_init(struct proc_io_accounting *ioac)
+static inline void task_io_accounting_init(struct task_io_accounting *ioac)
{
}
-static inline void task_blk_io_accounting_add(struct proc_io_accounting *dst,
- struct proc_io_accounting *src)
+static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
+ struct task_io_accounting *src)
{
}
#endif /* CONFIG_TASK_IO_ACCOUNTING */
#ifdef CONFIG_TASK_XACCT
-static inline void task_chr_io_accounting_add(struct proc_io_accounting *dst,
- struct proc_io_accounting *src)
+static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
+ struct task_io_accounting *src)
{
- dst->chr.rchar += src->chr.rchar;
- dst->chr.wchar += src->chr.wchar;
- dst->chr.syscr += src->chr.syscr;
- dst->chr.syscw += src->chr.syscw;
+ dst->rchar += src->rchar;
+ dst->wchar += src->wchar;
+ dst->syscr += src->syscr;
+ dst->syscw += src->syscw;
}
#else
-static inline void task_chr_io_accounting_add(struct proc_io_accounting *dst,
- struct proc_io_accounting *src)
+static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
+ struct task_io_accounting *src)
{
}
#endif /* CONFIG_TASK_XACCT */
-static inline void task_io_accounting_add(struct proc_io_accounting *dst,
- struct proc_io_accounting *src)
+static inline void task_io_accounting_add(struct task_io_accounting *dst,
+ struct task_io_accounting *src)
{
task_chr_io_accounting_add(dst, src);
task_blk_io_accounting_add(dst, src);
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index f9cd256..8ebcd85 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -94,14 +94,14 @@ void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
stats->hiwater_vm = mm->hiwater_vm * PAGE_SIZE / KB;
mmput(mm);
}
- stats->read_char = p->ioac.chr.rchar;
- stats->write_char = p->ioac.chr.wchar;
- stats->read_syscalls = p->ioac.chr.syscr;
- stats->write_syscalls = p->ioac.chr.syscw;
+ stats->read_char = p->ioac.rchar;
+ stats->write_char = p->ioac.wchar;
+ stats->read_syscalls = p->ioac.syscr;
+ stats->write_syscalls = p->ioac.syscw;
#ifdef CONFIG_TASK_IO_ACCOUNTING
- stats->read_bytes = p->ioac.blk.read_bytes;
- stats->write_bytes = p->ioac.blk.write_bytes;
- stats->cancelled_write_bytes = p->ioac.blk.cancelled_write_bytes;
+ stats->read_bytes = p->ioac.read_bytes;
+ stats->write_bytes = p->ioac.write_bytes;
+ stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;
#else
stats->read_bytes = 0;
stats->write_bytes = 0;
--
1.5.4.3
--
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