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e8471b42b2
While at it, made the configs a bit closer to those from Ubuntu: * disabled IDE drivers which are now barely maintained anyway; * disabled some debugging facilities (verboseness of some drivers, etc.); * made some often used modules like vfat, fuse, ata_piix, etc., built-in. * and so forth.
103 lines
3.4 KiB
Diff
103 lines
3.4 KiB
Diff
From 8500f47272575b4616beb487c483019248d8c501 Mon Sep 17 00:00:00 2001
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From: Paolo Valente <paolo.valente@unimore.it>
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Date: Tue, 7 Apr 2015 13:39:12 +0200
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Subject: [PATCH 1/4] block: cgroups, kconfig, build bits for BFQ-v7r11-4.10.0
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Update Kconfig.iosched and do the related Makefile changes to include
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kernel configuration options for BFQ. Also increase the number of
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policies supported by the blkio controller so that BFQ can add its
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own.
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Signed-off-by: Paolo Valente <paolo.valente@unimore.it>
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Signed-off-by: Arianna Avanzini <avanzini@google.com>
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---
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block/Kconfig.iosched | 32 ++++++++++++++++++++++++++++++++
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block/Makefile | 1 +
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include/linux/blkdev.h | 2 +-
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3 files changed, 34 insertions(+), 1 deletion(-)
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diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
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index 421bef9..0ee5f0f 100644
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--- a/block/Kconfig.iosched
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+++ b/block/Kconfig.iosched
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@@ -39,6 +39,27 @@ config CFQ_GROUP_IOSCHED
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---help---
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Enable group IO scheduling in CFQ.
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+config IOSCHED_BFQ
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+ tristate "BFQ I/O scheduler"
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+ default n
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+ ---help---
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+ The BFQ I/O scheduler tries to distribute bandwidth among
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+ all processes according to their weights.
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+ It aims at distributing the bandwidth as desired, independently of
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+ the disk parameters and with any workload. It also tries to
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+ guarantee low latency to interactive and soft real-time
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+ applications. If compiled built-in (saying Y here), BFQ can
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+ be configured to support hierarchical scheduling.
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+
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+config CGROUP_BFQIO
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+ bool "BFQ hierarchical scheduling support"
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+ depends on CGROUPS && IOSCHED_BFQ=y
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+ default n
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+ ---help---
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+ Enable hierarchical scheduling in BFQ, using the cgroups
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+ filesystem interface. The name of the subsystem will be
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+ bfqio.
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+
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choice
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prompt "Default I/O scheduler"
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default DEFAULT_CFQ
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@@ -52,6 +73,16 @@ choice
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config DEFAULT_CFQ
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bool "CFQ" if IOSCHED_CFQ=y
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+ config DEFAULT_BFQ
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+ bool "BFQ" if IOSCHED_BFQ=y
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+ help
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+ Selects BFQ as the default I/O scheduler which will be
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+ used by default for all block devices.
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+ The BFQ I/O scheduler aims at distributing the bandwidth
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+ as desired, independently of the disk parameters and with
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+ any workload. It also tries to guarantee low latency to
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+ interactive and soft real-time applications.
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+
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config DEFAULT_NOOP
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bool "No-op"
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@@ -61,6 +92,7 @@ config DEFAULT_IOSCHED
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string
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default "deadline" if DEFAULT_DEADLINE
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default "cfq" if DEFAULT_CFQ
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+ default "bfq" if DEFAULT_BFQ
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default "noop" if DEFAULT_NOOP
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endmenu
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diff --git a/block/Makefile b/block/Makefile
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index a827f98..3b14703 100644
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--- a/block/Makefile
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+++ b/block/Makefile
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@@ -18,6 +18,7 @@ obj-$(CONFIG_BLK_DEV_THROTTLING) += blk-throttle.o
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obj-$(CONFIG_IOSCHED_NOOP) += noop-iosched.o
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obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o
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obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o
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+obj-$(CONFIG_IOSCHED_BFQ) += bfq-iosched.o
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obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o
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obj-$(CONFIG_BLK_CMDLINE_PARSER) += cmdline-parser.o
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diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
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index 1ca8e8f..8e2d6ed 100644
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--- a/include/linux/blkdev.h
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+++ b/include/linux/blkdev.h
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@@ -47,7 +47,7 @@ struct rq_wb;
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* Maximum number of blkcg policies allowed to be registered concurrently.
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* Defined here to simplify include dependency.
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*/
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-#define BLKCG_MAX_POLS 2
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+#define BLKCG_MAX_POLS 3
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typedef void (rq_end_io_fn)(struct request *, int);
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--
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2.10.0
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