linux/debian/patches/patchset-zen/sauce/0012-ZEN-INTERACTIVE-Use-BFQ-as-the-elevator-for-SQ-devic.patch

From d2f0a5801471b5f67344b2c92a2aa29f1aed626a Mon Sep 17 00:00:00 2001
From: "Jan Alexander Steffens (heftig)" <jan.steffens@gmail.com>
Date: Mon, 27 Jan 2020 18:11:05 +0100
Subject: ZEN: INTERACTIVE: Use BFQ as the elevator for SQ devices

---
 block/elevator.c | 4 ++++
 init/Kconfig     | 4 ++++
 2 files changed, 8 insertions(+)

--- a/block/elevator.c
+++ b/block/elevator.c
@@ -568,7 +568,11 @@ static struct elevator_type *elevator_ge
 	    !blk_mq_is_shared_tags(q->tag_set->flags))
 		return NULL;
 
+#if defined(CONFIG_ZEN_INTERACTIVE) && defined(CONFIG_IOSCHED_BFQ)
+	return elevator_find_get("bfq");
+#else
 	return elevator_find_get("mq-deadline");
+#endif
 }
 
 /*
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -160,6 +160,10 @@ config ZEN_INTERACTIVE
 	help
 	  Tunes the kernel for responsiveness at the cost of throughput and power usage.
 
+	  --- Block Layer ----------------------------------------
+
+	    Default scheduler for SQ..: mq-deadline ->   bfq
+
 config BROKEN
 	bool