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authorIngo Molnar <mingo@kernel.org>2017-02-01 20:00:26 +0300
committerIngo Molnar <mingo@kernel.org>2017-03-02 10:42:42 +0300
commit47913d4ebd99c827c82c4f29eb282a119c3f2aeb (patch)
tree8ac85a83398a402fe29b878de87a5734d559cdc0 /include/linux/delayacct.h
parent5689810360c2e88ce1619e8bcfa859852f9a1d1a (diff)
downloadlinux-47913d4ebd99c827c82c4f29eb282a119c3f2aeb.tar.xz
sched/headers, delayacct: Move the 'struct task_delay_info' definition from <linux/sched.h> to <linux/delayacct.h>
The 'struct task_delay_info' definition does not have to be in sched.h, because task_struct only has a pointer to it. So move it to <linux/delayacct.h> to reduce the size of <linux/sched.h>. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/delayacct.h')
-rw-r--r--include/linux/delayacct.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/delayacct.h b/include/linux/delayacct.h
index 00e60f79a9cc..6b769cbd1000 100644
--- a/include/linux/delayacct.h
+++ b/include/linux/delayacct.h
@@ -30,7 +30,43 @@
#define DELAYACCT_PF_BLKIO 0x00000002 /* I am waiting on IO */
#ifdef CONFIG_TASK_DELAY_ACCT
+struct task_delay_info {
+ spinlock_t lock;
+ unsigned int flags; /* Private per-task flags */
+
+ /* For each stat XXX, add following, aligned appropriately
+ *
+ * struct timespec XXX_start, XXX_end;
+ * u64 XXX_delay;
+ * u32 XXX_count;
+ *
+ * Atomicity of updates to XXX_delay, XXX_count protected by
+ * single lock above (split into XXX_lock if contention is an issue).
+ */
+
+ /*
+ * XXX_count is incremented on every XXX operation, the delay
+ * associated with the operation is added to XXX_delay.
+ * XXX_delay contains the accumulated delay time in nanoseconds.
+ */
+ u64 blkio_start; /* Shared by blkio, swapin */
+ u64 blkio_delay; /* wait for sync block io completion */
+ u64 swapin_delay; /* wait for swapin block io completion */
+ u32 blkio_count; /* total count of the number of sync block */
+ /* io operations performed */
+ u32 swapin_count; /* total count of the number of swapin block */
+ /* io operations performed */
+
+ u64 freepages_start;
+ u64 freepages_delay; /* wait for memory reclaim */
+ u32 freepages_count; /* total count of memory reclaim */
+};
+#endif
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#ifdef CONFIG_TASK_DELAY_ACCT
extern int delayacct_on; /* Delay accounting turned on/off */
extern struct kmem_cache *delayacct_cache;
extern void delayacct_init(void);