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Commit 58c3c3aa authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Make taskstats round statistics down to nearest 1k bytes/events 



Even with just the interface limited to admin, there really is little to
reason to give byte-per-byte counts for taskstats.  So round it down to
something less intrusive.

Acked-by: default avatarBalbir Singh <bsingharora@gmail.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 1a51410a

kernel/tsacct.c

+8 −7
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk) 


#define KB 1024

#define MB (1024*KB)

#define KB_MASK (~(KB-1))

/*

 * fill in extended accounting fields

 */
@@ -95,14 +96,14 @@ void xacct_add_tsk(struct taskstats *stats, struct task_struct *p) 
		stats->hiwater_vm    = get_mm_hiwater_vm(mm)  * PAGE_SIZE / KB;

		mmput(mm);

	}

	stats->read_char	= p->ioac.rchar;

	stats->write_char	= p->ioac.wchar;

	stats->read_syscalls	= p->ioac.syscr;

	stats->write_syscalls	= p->ioac.syscw;

	stats->read_char	= p->ioac.rchar & KB_MASK;

	stats->write_char	= p->ioac.wchar & KB_MASK;

	stats->read_syscalls	= p->ioac.syscr & KB_MASK;

	stats->write_syscalls	= p->ioac.syscw & KB_MASK;

#ifdef CONFIG_TASK_IO_ACCOUNTING

	stats->read_bytes	= p->ioac.read_bytes;

	stats->write_bytes	= p->ioac.write_bytes;

	stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;

	stats->read_bytes	= p->ioac.read_bytes & KB_MASK;

	stats->write_bytes	= p->ioac.write_bytes & KB_MASK;

	stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes & KB_MASK;

#else

	stats->read_bytes	= 0;

	stats->write_bytes	= 0;