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 9dce692e25a2..2b492efcfecd 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1086,6 +1086,9 @@ blk_qc_t submit_bio(struct bio *bio)
 			count_vm_events(PGPGIN, count);
 		}
 
+		if (bio->bi_opf & REQ_PREFLUSH)
+			current->fsync_count++;
+
 		if (unlikely(block_dump)) {
 			char b[BDEVNAME_SIZE];
 			printk(KERN_DEBUG "%s(%d): %s block %Lu on %s (%u sectors)\n",
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 32813c345115..170f9787d13b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -961,6 +961,7 @@ 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 f8c94bebd17d..540fcbbe8bd2 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -951,6 +951,7 @@ 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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