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From: SeongJae Park <sj38.park@gmail.com>
To: akpm@linux-foundation.org
Cc: SeongJae Park <sjpark@amazon.de>,
	Jonathan.Cameron@Huawei.com, acme@kernel.org,
	alexander.shishkin@linux.intel.com, amit@kernel.org,
	benh@kernel.crashing.org, brendanhiggins@google.com,
	corbet@lwn.net, david@redhat.com, dwmw@amazon.com,
	elver@google.com, fan.du@intel.com, foersleo@amazon.de,
	greg@kroah.com, gthelen@google.com, guoju.fgj@alibaba-inc.com,
	jgowans@amazon.com, joe@perches.com, mgorman@suse.de,
	mheyne@amazon.de, minchan@kernel.org, mingo@redhat.com,
	namhyung@kernel.org, peterz@infradead.org, riel@surriel.com,
	rientjes@google.com, rostedt@goodmis.org, rppt@kernel.org,
	shakeelb@google.com, shuah@kernel.org, sieberf@amazon.com,
	sj38.park@gmail.com, snu@zelle79.org, vbabka@suse.cz,
	vdavydov.dev@gmail.com, zgf574564920@gmail.com,
	linux-damon@amazon.com, linux-mm@kvack.org,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC v3 05/15] mm/damon/dbgfs: Support schemes' time/IO quotas
Date: Tue, 20 Jul 2021 13:12:59 +0000	[thread overview]
Message-ID: <20210720131309.22073-6-sj38.park@gmail.com> (raw)
In-Reply-To: <20210720131309.22073-1-sj38.park@gmail.com>

From: SeongJae Park <sjpark@amazon.de>

This commit makes the debugfs interface of DAMON to support the schemes'
time/IO quotas by chaning the format of the input for the schemes file.

Signed-off-by: SeongJae Park <sjpark@amazon.de>
---
 mm/damon/dbgfs.c | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/mm/damon/dbgfs.c b/mm/damon/dbgfs.c
index ac0de2de1987..3cd253a07116 100644
--- a/mm/damon/dbgfs.c
+++ b/mm/damon/dbgfs.c
@@ -227,11 +227,14 @@ static ssize_t sprint_schemes(struct damon_ctx *c, char *buf, ssize_t len)
 
 	damon_for_each_scheme(s, c) {
 		rc = scnprintf(&buf[written], len - written,
-				"%lu %lu %u %u %u %u %d %lu %lu\n",
+				"%lu %lu %u %u %u %u %d %lu %lu %lu %lu %lu\n",
 				s->min_sz_region, s->max_sz_region,
 				s->min_nr_accesses, s->max_nr_accesses,
 				s->min_age_region, s->max_age_region,
-				s->action, s->stat_count, s->stat_sz);
+				s->action,
+				s->quota.ms, s->quota.sz,
+				s->quota.reset_interval,
+				s->stat_count, s->stat_sz);
 		if (!rc)
 			return -ENOMEM;
 
@@ -312,10 +315,11 @@ static struct damos **str_to_schemes(const char *str, ssize_t len,
 	while (pos < len && *nr_schemes < max_nr_schemes) {
 		struct damos_quota quota = {};
 
-		ret = sscanf(&str[pos], "%lu %lu %u %u %u %u %u%n",
+		ret = sscanf(&str[pos], "%lu %lu %u %u %u %u %u %lu %lu %lu%n",
 				&min_sz, &max_sz, &min_nr_a, &max_nr_a,
-				&min_age, &max_age, &action, &parsed);
-		if (ret != 7)
+				&min_age, &max_age, &action, &quota.ms,
+				&quota.sz, &quota.reset_interval, &parsed);
+		if (ret != 10)
 			break;
 		if (!damos_action_valid(action)) {
 			pr_err("wrong action %d\n", action);
@@ -1137,6 +1141,15 @@ static ssize_t dbgfs_monitor_on_write(struct file *file,
 	return ret;
 }
 
+/*
+ * v1: Add the scheme speed limit
+ */
+static ssize_t dbgfs_version_read(struct file *file,
+		char __user *buf, size_t count, loff_t *ppos)
+{
+	return simple_read_from_buffer(buf, count, ppos, "1\n", 2);
+}
+
 static const struct file_operations mk_contexts_fops = {
 	.write = dbgfs_mk_context_write,
 };
@@ -1150,13 +1163,18 @@ static const struct file_operations monitor_on_fops = {
 	.write = dbgfs_monitor_on_write,
 };
 
+static const struct file_operations version_fops = {
+	.owner = THIS_MODULE,
+	.read = dbgfs_version_read,
+};
+
 static int __init __damon_dbgfs_init(void)
 {
 	struct dentry *dbgfs_root;
 	const char * const file_names[] = {"mk_contexts", "rm_contexts",
-		"monitor_on"};
+		"monitor_on", "version"};
 	const struct file_operations *fops[] = {&mk_contexts_fops,
-		&rm_contexts_fops, &monitor_on_fops};
+		&rm_contexts_fops, &monitor_on_fops, &version_fops};
 	int i;
 
 	dbgfs_root = debugfs_create_dir("damon", NULL);
-- 
2.17.1


  parent reply	other threads:[~2021-07-20 13:28 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-20 13:12 [RFC v3 00/15] Introduce DAMON-based Proactive Reclamation SeongJae Park
2021-07-20 13:12 ` [RFC v3 01/15] mm/damon/paddr: Support the pageout scheme SeongJae Park
2021-07-20 13:12 ` [RFC v3 02/15] mm/damon/damos: Make schemes aggressiveness controllable SeongJae Park
2021-07-20 13:12 ` [RFC v3 03/15] damon/core/schemes: Skip already charged targets and regions SeongJae Park
2021-07-20 13:12 ` [RFC v3 04/15] mm/damon/schemes: Implement time quota SeongJae Park
2021-07-20 13:12 ` SeongJae Park [this message]
2021-07-20 13:13 ` [RFC v3 06/15] mm/damon/selftests: Support schemes quotas SeongJae Park
2021-07-20 13:13 ` [RFC v3 07/15] mm/damon/schemes: Prioritize regions within the quotas SeongJae Park
2021-07-20 13:13 ` [RFC v3 08/15] mm/damon/vaddr,paddr: Support pageout prioritization SeongJae Park
2021-07-20 13:13 ` [RFC v3 09/15] mm/damon/dbgfs: Support prioritization weights SeongJae Park
2021-07-20 13:13 ` [RFC v3 10/15] tools/selftests/damon: Update for regions prioritization of schemes SeongJae Park
2021-07-20 13:13 ` [RFC v3 11/15] mm/damon/schemes: Activate schemes based on a watermarks mechanism SeongJae Park
2021-07-20 13:13 ` [RFC v3 12/15] mm/damon/dbgfs: Support watermarks SeongJae Park
2021-07-20 13:13 ` [RFC v3 13/15] selftests/damon: " SeongJae Park
2021-07-20 13:13 ` [RFC v3 14/15] mm/damon: Introduce DAMON-based reclamation SeongJae Park
2021-07-20 13:13 ` [RFC v3 15/15] Documentation/admin-guide/mm/damon: Add a document for DAMON_RECLAIM SeongJae Park

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