Blame - block/Kconfig - kernel/msm-4.19

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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
Jens Axboe	51d7513	2006-09-30 21:14:05 +0200	[diff] [blame]	5	bool "Enable the block layer" if EMBEDDED
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
Martin K. Petersen	7ba1ba1	2008-06-30 20:04:41 +0200	[diff] [blame]	68	config BLK_DEV_INTEGRITY
				69	bool "Block layer data integrity support"
				70	---help---
				71	Some storage devices allow extra information to be
				72	stored/retrieved to help protect the data. The block layer
				73	data integrity option provides hooks which can be used by
				74	filesystems to ensure better data integrity.
				75
				76	Say yes here if you have a storage device that provides the
				77	T10/SCSI Data Integrity Field or the T13/ATA External Path
				78	Protection. If in doubt, say N.
				79
Vivek Goyal	31e4c28	2009-12-03 12:59:42 -0500	[diff] [blame]	80	config BLK_CGROUP
				81	bool
				82	depends on CGROUPS
				83	default n
				84	---help---
				85	Generic block IO controller cgroup interface. This is the common
				86	cgroup interface which should be used by various IO controlling
				87	policies.
				88
				89	Currently, CFQ IO scheduler uses it to recognize task groups and
				90	control disk bandwidth allocation (proportional time slice allocation)
				91	to such task groups.
				92
Vivek Goyal	2868ef7	2009-12-03 12:59:48 -0500	[diff] [blame^]	93	config DEBUG_BLK_CGROUP
				94	bool
				95	depends on BLK_CGROUP
				96	default n
				97	---help---
				98	Enable some debugging help. Currently it stores the cgroup path
				99	in the blk group which can be used by cfq for tracing various
				100	group related activity.
				101
Linus Torvalds	2b9e0aa	2007-10-12 17:58:36 -0700	[diff] [blame]	102	endif # BLOCK
				103
Jens Axboe	99874d5	2007-10-12 12:50:41 +0200	[diff] [blame]	104	config BLOCK_COMPAT
				105	bool
Linus Torvalds	2b9e0aa	2007-10-12 17:58:36 -0700	[diff] [blame]	106	depends on BLOCK && COMPAT
Jens Axboe	99874d5	2007-10-12 12:50:41 +0200	[diff] [blame]	107	default y
				108
Jens Axboe	3a65dfe	2005-11-04 08:43:35 +0100	[diff] [blame]	109	source block/Kconfig.iosched