[PATCH] per-task-delay-accounting: cpu delay collection via schedstats

[karo-tx-linux.git] / kernel / delayacct.c

diff --git a/kernel/delayacct.c b/kernel/delayacct.c
index fbf7f228495289ad9349b9a9ebce0b274ae4bf7d..3546b0800f9f393a4196a8ed154a6f8833ba5950 100644 (file)
--- a/kernel/delayacct.c
+++ b/kernel/delayacct.c
@@ -85,3 +85,22 @@ static void delayacct_end(struct timespec *start, struct timespec *end,
        spin_unlock(&current->delays->lock);
 }
 
+void __delayacct_blkio_start(void)
+{
+       delayacct_start(&current->delays->blkio_start);
+}
+
+void __delayacct_blkio_end(void)
+{
+       if (current->delays->flags & DELAYACCT_PF_SWAPIN)
+               /* Swapin block I/O */
+               delayacct_end(&current->delays->blkio_start,
+                       &current->delays->blkio_end,
+                       &current->delays->swapin_delay,
+                       &current->delays->swapin_count);
+       else    /* Other block I/O */
+               delayacct_end(&current->delays->blkio_start,
+                       &current->delays->blkio_end,
+                       &current->delays->blkio_delay,
+                       &current->delays->blkio_count);
+}