42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
From f5b82cc382eaf3ddf5c26f60965037bde8733445 Mon Sep 17 00:00:00 2001
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From: Steven Barrett <steven@liquorix.net>
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Date: Wed, 11 Aug 2021 18:47:46 -0500
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Subject: ZEN: INTERACTIVE: Tune mgLRU to protect cache used in the last second
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Although not identical to the le9 patches that protect a byte-amount of
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cache through tunables, multigenerational LRU now supports protecting
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cache accessed in the last X milliseconds.
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In #218, Yu recommends starting with 1000ms and tuning as needed. This
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looks like a safe default and turning on this feature should help users
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that don't know they need it.
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---
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init/Kconfig | 1 +
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mm/vmscan.c | 4 ++++
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2 files changed, 5 insertions(+)
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--- a/init/Kconfig
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+++ b/init/Kconfig
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@@ -157,6 +157,7 @@ config ZEN_INTERACTIVE
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--- Virtual Memory Subsystem ---------------------------
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Background-reclaim hugepages...: no -> yes
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+ MG-LRU minimum cache TTL.......: 0 -> 1000 ms
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config BROKEN
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bool
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--- a/mm/vmscan.c
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+++ b/mm/vmscan.c
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@@ -3974,7 +3974,11 @@ static bool lruvec_is_reclaimable(struct
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}
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/* to protect the working set of the last N jiffies */
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+#ifdef CONFIG_ZEN_INTERACTIVE
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+static unsigned long lru_gen_min_ttl __read_mostly = HZ;
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+#else
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static unsigned long lru_gen_min_ttl __read_mostly;
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+#endif
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static void lru_gen_age_node(struct pglist_data *pgdat, struct scan_control *sc)
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{
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