Blame - block/Kconfig - kernel/msm-4.9

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Jens Axboe	3a65dfe	2005-11-04 08:43:35 +0100	[diff] [blame]	1	#
				2	# Block layer core configuration
				3	#
Jan Engelhardt	16ed002	2007-07-10 12:24:11 +0200	[diff] [blame]	4	menuconfig BLOCK
David Rientjes	6a108a1	2011-01-20 14:44:16 -0800	[diff] [blame]	5	bool "Enable the block layer" if EXPERT
David Howells	9361401	2006-09-30 20:45:40 +0200	[diff] [blame]	6	default y
				7	help
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	8	Provide block layer support for the kernel.
David Howells	9361401	2006-09-30 20:45:40 +0200	[diff] [blame]	9
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	10	Disable this option to remove the block layer support from the
				11	kernel. This may be useful for embedded devices.
				12
				13	If this option is disabled:
				14
				15	- block device files will become unusable
				16	- some filesystems (such as ext3) will become unavailable.
				17
				18	Also, SCSI character devices and USB storage will be disabled since
				19	they make use of various block layer definitions and facilities.
David Howells	9361401	2006-09-30 20:45:40 +0200	[diff] [blame]	20
				21	Say Y here unless you know you really don't want to mount disks and
				22	suchlike.
				23
				24	if BLOCK
				25
Bartlomiej Zolnierkiewicz	90c699a	2009-06-19 08:08:50 +0200	[diff] [blame]	26	config LBDAF
				27	bool "Support for large (2TB+) block devices and files"
Matthew Wilcox	e624386	2006-12-04 03:38:31 -0700	[diff] [blame]	28	depends on !64BIT
Bartlomiej Zolnierkiewicz	db29a6b	2009-04-21 09:27:03 +0200	[diff] [blame]	29	default y
Jens Axboe	3a65dfe	2005-11-04 08:43:35 +0100	[diff] [blame]	30	help
Jens Axboe	b3a6ffe	2008-12-12 09:51:16 +0100	[diff] [blame]	31	Enable block devices or files of size 2TB and larger.
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	32
				33	This option is required to support the full capacity of large
				34	(2TB+) block devices, including RAID, disk, Network Block Device,
				35	Logical Volume Manager (LVM) and loopback.
Jens Axboe	b3a6ffe	2008-12-12 09:51:16 +0100	[diff] [blame]	36
				37	This option also enables support for single files larger than
				38	2TB.
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	39
Theodore Ts'o	4d783b0	2009-01-06 15:16:33 -0500	[diff] [blame]	40	The ext4 filesystem requires that this feature be enabled in
				41	order to support filesystems that have the huge_file feature
Bartlomiej Zolnierkiewicz	db29a6b	2009-04-21 09:27:03 +0200	[diff] [blame]	42	enabled. Otherwise, it will refuse to mount in the read-write
				43	mode any filesystems that use the huge_file feature, which is
				44	enabled by default by mke2fs.ext4.
Theodore Ts'o	4d783b0	2009-01-06 15:16:33 -0500	[diff] [blame]	45
Bartlomiej Zolnierkiewicz	db29a6b	2009-04-21 09:27:03 +0200	[diff] [blame]	46	The GFS2 filesystem also requires this feature.
				47
				48	If unsure, say Y.
Jens Axboe	3a65dfe	2005-11-04 08:43:35 +0100	[diff] [blame]	49
Jens Axboe	3d6392c	2007-07-09 12:38:05 +0200	[diff] [blame]	50	config BLK_DEV_BSG
John Stoffel	14d9fa3	2009-08-04 22:10:17 +0200	[diff] [blame]	51	bool "Block layer SG support v4"
				52	default y
				53	help
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	54	Saying Y here will enable generic SG (SCSI generic) v4 support
				55	for any block device.
FUJITA Tomonori	319a7b7	2007-07-17 12:22:09 +0200	[diff] [blame]	56
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	57	Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
				58	can handle complicated SCSI commands: tagged variable length cdbs
				59	with bidirectional data transfers and generic request/response
				60	protocols (e.g. Task Management Functions and SMP in Serial
				61	Attached SCSI).
				62
John Stoffel	14d9fa3	2009-08-04 22:10:17 +0200	[diff] [blame]	63	This option is required by recent UDEV versions to properly
				64	access device serial numbers, etc.
				65
				66	If unsure, say Y.
Jens Axboe	3d6392c	2007-07-09 12:38:05 +0200	[diff] [blame]	67
Mike Christie	aa387cc	2011-07-31 22:05:09 +0200	[diff] [blame]	68	config BLK_DEV_BSGLIB
				69	bool "Block layer SG support v4 helper lib"
				70	default n
				71	select BLK_DEV_BSG
				72	help
				73	Subsystems will normally enable this if needed. Users will not
				74	normally need to manually enable this.
				75
				76	If unsure, say N.
				77
Martin K. Petersen	7ba1ba1	2008-06-30 20:04:41 +0200	[diff] [blame]	78	config BLK_DEV_INTEGRITY
				79	bool "Block layer data integrity support"
				80	---help---
				81	Some storage devices allow extra information to be
				82	stored/retrieved to help protect the data. The block layer
				83	data integrity option provides hooks which can be used by
				84	filesystems to ensure better data integrity.
				85
				86	Say yes here if you have a storage device that provides the
				87	T10/SCSI Data Integrity Field or the T13/ATA External Path
				88	Protection. If in doubt, say N.
				89
Vivek Goyal	e43473b	2010-09-15 17:06:35 -0400	[diff] [blame]	90	config BLK_DEV_THROTTLING
				91	bool "Block layer bio throttling support"
Kees Cook	8e42e0a	2012-10-23 13:01:46 -0700	[diff] [blame]	92	depends on BLK_CGROUP=y
Vivek Goyal	e43473b	2010-09-15 17:06:35 -0400	[diff] [blame]	93	default n
				94	---help---
				95	Block layer bio throttling support. It can be used to limit
				96	the IO rate to a device. IO rate policies are per cgroup and
				97	one needs to mount and use blkio cgroup controller for creating
				98	cgroups and specifying per device IO rate policies.
				99
				100	See Documentation/cgroups/blkio-controller.txt for more information.
				101
Cai Zhiyong	bab5541	2013-09-11 14:20:09 -0700	[diff] [blame]	102	config CMDLINE_PARSER
				103	bool "Block device command line partition parser"
				104	default n
				105	---help---
				106	Parsing command line, get the partitions information.
				107
Al Viro	9be96f3	2011-09-16 00:25:05 -0400	[diff] [blame]	108	menu "Partition Types"
				109
				110	source "block/partitions/Kconfig"
				111
				112	endmenu
				113
Linus Torvalds	2b9e0aa	2007-10-12 17:58:36 -0700	[diff] [blame]	114	endif # BLOCK
				115
Jens Axboe	99874d5	2007-10-12 12:50:41 +0200	[diff] [blame]	116	config BLOCK_COMPAT
				117	bool
Linus Torvalds	2b9e0aa	2007-10-12 17:58:36 -0700	[diff] [blame]	118	depends on BLOCK && COMPAT
Jens Axboe	99874d5	2007-10-12 12:50:41 +0200	[diff] [blame]	119	default y
				120
Jens Axboe	3a65dfe	2005-11-04 08:43:35 +0100	[diff] [blame]	121	source block/Kconfig.iosched