blob: 5c22355ebfce6e7bafaa47d1f416f18051aff1be (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Steven Barrett <steven@liquorix.net>
Date: Wed, 11 Aug 2021 18:41:50 -0500
Subject: [PATCH] ZEN: Tune mgLRU to protect cache used in the last second
Although not identical to the le9 patches that protect a byte-amount of
cache through tunables, multigenerational LRU now supports protecting
cache accessed in the last X milliseconds.
In #218, Yu recommends starting with 1000ms and tuning as needed. This
looks like a safe default and turning on this feature should help users
that don't know they need it.
---
mm/vmscan.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7096ff7836dbf133ca2f6d4c13258780e98d72d8..adcaf8250b2b497a99f9394ee3fd476dc339df0d 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4434,7 +4434,11 @@ static bool age_lruvec(struct lruvec *lruvec, struct scan_control *sc, unsigned
}
/* to protect the working set of the last N jiffies */
+#ifdef CONFIG_ZEN_INTERACTIVE
+static unsigned long lru_gen_min_ttl __read_mostly = HZ;
+#else
static unsigned long lru_gen_min_ttl __read_mostly;
+#endif
static void lru_gen_age_node(struct pglist_data *pgdat, struct scan_control *sc)
{
|