gentoo-overlay/sys-kernel/linux-hardened-sources/files/5.4/000115_0115-print-fsync-cou...

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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 d5e668ec751b..be554fee0584 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1168,6 +1168,9 @@ 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 775503573ed7..08eb6063db49 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -881,6 +881,7 @@ 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 f7e4579e746c..2e4e887349ff 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -879,6 +879,7 @@ 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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