0113-print-fsync-count-for-bootchart.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Tue, 20 Jun 2017 20:19:08 +0000
Subject: [PATCH] print fsync count for bootchart

---
 block/blk-core.c      | 3 +++
 include/linux/sched.h | 1 +
 kernel/sched/debug.c  | 1 +
 3 files changed, 5 insertions(+)

diff --git a/block/blk-core.c b/block/blk-core.c
index 779b4a1f66ac..f1a4da52b511 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -945,6 +945,9 @@ void submit_bio(struct bio *bio)
 			task_io_account_read(bio->bi_iter.bi_size);
 			count_vm_events(PGPGIN, count);
 		}
+
+		if (bio->bi_opf & REQ_PREFLUSH)
+			current->fsync_count++;
 	}
 
 	/*
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4b4cc633b266..094875ea5388 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1046,6 +1046,7 @@ struct task_struct {
 	/* Cached requested key. */
 	struct key			*cached_requested_key;
 #endif
+	int fsync_count;
 
 	/*
 	 * executable name, excluding path.
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 102d6f70e84d..cc06e81a9e61 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -960,6 +960,7 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
 	PN(se.exec_start);
 	PN(se.vruntime);
 	PN(se.sum_exec_runtime);
+	P(fsync_count);
 
 	nr_switches = p->nvcsw + p->nivcsw;
 
-- 
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