The patch titled
per-task-delay-accounting: update taskstats for memory reclaim delay
has been added to the -mm tree. Its filename is
per-task-delay-accounting-update-taskstats-for-memory-reclaim-delay.patch
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------------------------------------------------------
Subject: per-task-delay-accounting: update taskstats for memory reclaim delay
From: Keika Kobayashi <kobayashi.kk@xxxxxxxxxxxxxx>
Add members for memory reclaim delay to taskstats, and accumulate them in
__delayacct_add_tsk() .
Signed-off-by: Keika Kobayashi <kobayashi.kk@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/accounting/taskstats-struct.txt | 6 ++++++
include/linux/taskstats.h | 6 +++++-
kernel/delayacct.c | 3 +++
3 files changed, 14 insertions(+), 1 deletion(-)
diff -puN Documentation/accounting/taskstats-struct.txt~per-task-delay-accounting-update-taskstats-for-memory-reclaim-delay Documentation/accounting/taskstats-struct.txt
--- a/Documentation/accounting/taskstats-struct.txt~per-task-delay-accounting-update-taskstats-for-memory-reclaim-delay
+++ a/Documentation/accounting/taskstats-struct.txt
@@ -24,6 +24,8 @@ There are three different groups of fiel
4) Per-task and per-thread context switch count statistics
+6) Extended delay accounting fields for memory reclaim
+
Future extension should add fields to the end of the taskstats struct, and
should not change the relative position of each field within the struct.
@@ -164,4 +166,8 @@ struct taskstats {
__u64 nvcsw; /* Context voluntary switch counter */
__u64 nivcsw; /* Context involuntary switch counter */
+6) Extended delay accounting fields for memory reclaim
+ /* Delay waiting for memory reclaim */
+ __u64 freepages_count;
+ __u64 freepages_delay_total;
}
diff -puN include/linux/taskstats.h~per-task-delay-accounting-update-taskstats-for-memory-reclaim-delay include/linux/taskstats.h
--- a/include/linux/taskstats.h~per-task-delay-accounting-update-taskstats-for-memory-reclaim-delay
+++ a/include/linux/taskstats.h
@@ -31,7 +31,7 @@
*/
-#define TASKSTATS_VERSION 6
+#define TASKSTATS_VERSION 7
#define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN
* in linux/sched.h */
@@ -157,6 +157,10 @@ struct taskstats {
__u64 ac_utimescaled; /* utime scaled on frequency etc */
__u64 ac_stimescaled; /* stime scaled on frequency etc */
__u64 cpu_scaled_run_real_total; /* scaled cpu_run_real_total */
+
+ /* Delay waiting for memory reclaim */
+ __u64 freepages_count;
+ __u64 freepages_delay_total;
};
diff -puN kernel/delayacct.c~per-task-delay-accounting-update-taskstats-for-memory-reclaim-delay kernel/delayacct.c
--- a/kernel/delayacct.c~per-task-delay-accounting-update-taskstats-for-memory-reclaim-delay
+++ a/kernel/delayacct.c
@@ -145,8 +145,11 @@ int __delayacct_add_tsk(struct taskstats
d->blkio_delay_total = (tmp < d->blkio_delay_total) ? 0 : tmp;
tmp = d->swapin_delay_total + tsk->delays->swapin_delay;
d->swapin_delay_total = (tmp < d->swapin_delay_total) ? 0 : tmp;
+ tmp = d->freepages_delay_total + tsk->delays->freepages_delay;
+ d->freepages_delay_total = (tmp < d->freepages_delay_total) ? 0 : tmp;
d->blkio_count += tsk->delays->blkio_count;
d->swapin_count += tsk->delays->swapin_count;
+ d->freepages_count += tsk->delays->freepages_count;
spin_unlock_irqrestore(&tsk->delays->lock, flags);
done:
_
Patches currently in -mm which might be from kobayashi.kk@xxxxxxxxxxxxxx are
per-task-delay-accounting-add-memory-reclaim-delay.patch
per-task-delay-accounting-update-taskstats-for-memory-reclaim-delay.patch
per-task-delay-accounting-update-document-and-getdelaysc-for-memory-reclaim.patch
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