Blame - block/Kconfig - SHIFTPHONES/mainline/linux

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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
Omar Sandoval	8845964	2016-09-17 08:38:44 -0600	[diff] [blame]	7	select SBITMAP
Bart Van Assche	6a83e74	2016-11-02 10:09:51 -0600	[diff] [blame]	8	select SRCU
David Howells	9361401	2006-09-30 20:45:40 +0200	[diff] [blame]	9	help
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	10	Provide block layer support for the kernel.
David Howells	9361401	2006-09-30 20:45:40 +0200	[diff] [blame]	11
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	12	Disable this option to remove the block layer support from the
				13	kernel. This may be useful for embedded devices.
				14
				15	If this option is disabled:
				16
				17	- block device files will become unusable
				18	- some filesystems (such as ext3) will become unavailable.
				19
				20	Also, SCSI character devices and USB storage will be disabled since
				21	they make use of various block layer definitions and facilities.
David Howells	9361401	2006-09-30 20:45:40 +0200	[diff] [blame]	22
				23	Say Y here unless you know you really don't want to mount disks and
				24	suchlike.
				25
				26	if BLOCK
				27
Bartlomiej Zolnierkiewicz	90c699a	2009-06-19 08:08:50 +0200	[diff] [blame]	28	config LBDAF
				29	bool "Support for large (2TB+) block devices and files"
Matthew Wilcox	e624386	2006-12-04 03:38:31 -0700	[diff] [blame]	30	depends on !64BIT
Bartlomiej Zolnierkiewicz	db29a6b	2009-04-21 09:27:03 +0200	[diff] [blame]	31	default y
Jens Axboe	3a65dfe	2005-11-04 08:43:35 +0100	[diff] [blame]	32	help
Jens Axboe	b3a6ffe	2008-12-12 09:51:16 +0100	[diff] [blame]	33	Enable block devices or files of size 2TB and larger.
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	34
				35	This option is required to support the full capacity of large
				36	(2TB+) block devices, including RAID, disk, Network Block Device,
				37	Logical Volume Manager (LVM) and loopback.
Jens Axboe	b3a6ffe	2008-12-12 09:51:16 +0100	[diff] [blame]	38
				39	This option also enables support for single files larger than
				40	2TB.
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	41
Theodore Ts'o	4d783b0	2009-01-06 15:16:33 -0500	[diff] [blame]	42	The ext4 filesystem requires that this feature be enabled in
				43	order to support filesystems that have the huge_file feature
Bartlomiej Zolnierkiewicz	db29a6b	2009-04-21 09:27:03 +0200	[diff] [blame]	44	enabled. Otherwise, it will refuse to mount in the read-write
				45	mode any filesystems that use the huge_file feature, which is
				46	enabled by default by mke2fs.ext4.
Theodore Ts'o	4d783b0	2009-01-06 15:16:33 -0500	[diff] [blame]	47
Bartlomiej Zolnierkiewicz	db29a6b	2009-04-21 09:27:03 +0200	[diff] [blame]	48	The GFS2 filesystem also requires this feature.
				49
				50	If unsure, say Y.
Jens Axboe	3a65dfe	2005-11-04 08:43:35 +0100	[diff] [blame]	51
Jens Axboe	3d6392c	2007-07-09 12:38:05 +0200	[diff] [blame]	52	config BLK_DEV_BSG
John Stoffel	14d9fa3	2009-08-04 22:10:17 +0200	[diff] [blame]	53	bool "Block layer SG support v4"
				54	default y
				55	help
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	56	Saying Y here will enable generic SG (SCSI generic) v4 support
				57	for any block device.
FUJITA Tomonori	319a7b7	2007-07-17 12:22:09 +0200	[diff] [blame]	58
Nick Andrew	ee86418	2008-04-21 09:51:04 +0200	[diff] [blame]	59	Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
				60	can handle complicated SCSI commands: tagged variable length cdbs
				61	with bidirectional data transfers and generic request/response
				62	protocols (e.g. Task Management Functions and SMP in Serial
				63	Attached SCSI).
				64
John Stoffel	14d9fa3	2009-08-04 22:10:17 +0200	[diff] [blame]	65	This option is required by recent UDEV versions to properly
				66	access device serial numbers, etc.
				67
				68	If unsure, say Y.
Jens Axboe	3d6392c	2007-07-09 12:38:05 +0200	[diff] [blame]	69
Mike Christie	aa387cc	2011-07-31 22:05:09 +0200	[diff] [blame]	70	config BLK_DEV_BSGLIB
				71	bool "Block layer SG support v4 helper lib"
				72	default n
				73	select BLK_DEV_BSG
				74	help
				75	Subsystems will normally enable this if needed. Users will not
				76	normally need to manually enable this.
				77
				78	If unsure, say N.
				79
Martin K. Petersen	7ba1ba1	2008-06-30 20:04:41 +0200	[diff] [blame]	80	config BLK_DEV_INTEGRITY
				81	bool "Block layer data integrity support"
Martin K. Petersen	2341c2f8	2014-09-26 19:20:07 -0400	[diff] [blame]	82	select CRC_T10DIF if BLK_DEV_INTEGRITY
Martin K. Petersen	7ba1ba1	2008-06-30 20:04:41 +0200	[diff] [blame]	83	---help---
				84	Some storage devices allow extra information to be
				85	stored/retrieved to help protect the data. The block layer
				86	data integrity option provides hooks which can be used by
				87	filesystems to ensure better data integrity.
				88
				89	Say yes here if you have a storage device that provides the
				90	T10/SCSI Data Integrity Field or the T13/ATA External Path
				91	Protection. If in doubt, say N.
				92
Hannes Reinecke	6a0cb1b	2016-10-18 15:40:33 +0900	[diff] [blame]	93	config BLK_DEV_ZONED
				94	bool "Zoned block device support"
				95	---help---
				96	Block layer zoned block device support. This option enables
				97	support for ZAC/ZBC host-managed and host-aware zoned block devices.
				98
				99	Say yes here if you have a ZAC or ZBC storage device.
				100
Vivek Goyal	e43473b	2010-09-15 17:06:35 -0400	[diff] [blame]	101	config BLK_DEV_THROTTLING
				102	bool "Block layer bio throttling support"
Kees Cook	8e42e0a	2012-10-23 13:01:46 -0700	[diff] [blame]	103	depends on BLK_CGROUP=y
Vivek Goyal	e43473b	2010-09-15 17:06:35 -0400	[diff] [blame]	104	default n
				105	---help---
				106	Block layer bio throttling support. It can be used to limit
				107	the IO rate to a device. IO rate policies are per cgroup and
				108	one needs to mount and use blkio cgroup controller for creating
				109	cgroups and specifying per device IO rate policies.
				110
				111	See Documentation/cgroups/blkio-controller.txt for more information.
				112
Paul Gortmaker	080506a	2013-09-30 13:45:19 -0700	[diff] [blame]	113	config BLK_CMDLINE_PARSER
Cai Zhiyong	bab5541	2013-09-11 14:20:09 -0700	[diff] [blame]	114	bool "Block device command line partition parser"
				115	default n
				116	---help---
Paul Gortmaker	080506a	2013-09-30 13:45:19 -0700	[diff] [blame]	117	Enabling this option allows you to specify the partition layout from
				118	the kernel boot args. This is typically of use for embedded devices
				119	which don't otherwise have any standardized method for listing the
				120	partitions on a block device.
				121
				122	See Documentation/block/cmdline-partition.txt for more information.
Cai Zhiyong	bab5541	2013-09-11 14:20:09 -0700	[diff] [blame]	123
Al Viro	9be96f3	2011-09-16 00:25:05 -0400	[diff] [blame]	124	menu "Partition Types"
				125
				126	source "block/partitions/Kconfig"
				127
				128	endmenu
				129
Linus Torvalds	2b9e0aa	2007-10-12 17:58:36 -0700	[diff] [blame]	130	endif # BLOCK
				131
Jens Axboe	99874d5	2007-10-12 12:50:41 +0200	[diff] [blame]	132	config BLOCK_COMPAT
				133	bool
Linus Torvalds	2b9e0aa	2007-10-12 17:58:36 -0700	[diff] [blame]	134	depends on BLOCK && COMPAT
Jens Axboe	99874d5	2007-10-12 12:50:41 +0200	[diff] [blame]	135	default y
				136
Stephen Rothwell	8ec2ef2	2016-09-19 15:50:16 +1000	[diff] [blame]	137	config BLK_MQ_PCI
				138	bool
				139	depends on BLOCK && PCI
				140	default y
				141
Jens Axboe	3a65dfe	2005-11-04 08:43:35 +0100	[diff] [blame]	142	source block/Kconfig.iosched