53 lines
1.5 KiB
Diff
53 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Arjan van de Ven <arjan@linux.intel.com>
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Date: Tue, 20 Jun 2017 20:19:08 +0000
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Subject: [PATCH] print fsync count for bootchart
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---
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block/blk-core.c | 3 +++
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include/linux/sched.h | 1 +
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kernel/sched/debug.c | 1 +
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3 files changed, 5 insertions(+)
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diff --git a/block/blk-core.c b/block/blk-core.c
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index d5e668ec751b..be554fee0584 100644
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--- a/block/blk-core.c
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+++ b/block/blk-core.c
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@@ -1168,6 +1168,9 @@ blk_qc_t submit_bio(struct bio *bio)
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count_vm_events(PGPGIN, count);
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}
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+ if (bio->bi_opf & REQ_PREFLUSH)
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+ current->fsync_count++;
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+
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if (unlikely(block_dump)) {
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char b[BDEVNAME_SIZE];
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printk(KERN_DEBUG "%s(%d): %s block %Lu on %s (%u sectors)\n",
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diff --git a/include/linux/sched.h b/include/linux/sched.h
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index 775503573ed7..08eb6063db49 100644
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--- a/include/linux/sched.h
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+++ b/include/linux/sched.h
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@@ -881,6 +881,7 @@ struct task_struct {
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/* Cached requested key. */
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struct key *cached_requested_key;
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#endif
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+ int fsync_count;
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/*
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* executable name, excluding path.
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diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
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index f7e4579e746c..2e4e887349ff 100644
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--- a/kernel/sched/debug.c
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+++ b/kernel/sched/debug.c
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@@ -879,6 +879,7 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
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PN(se.exec_start);
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PN(se.vruntime);
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PN(se.sum_exec_runtime);
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+ P(fsync_count);
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nr_switches = p->nvcsw + p->nivcsw;
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--
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https://clearlinux.org
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