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-#
-# Block layer core configuration
-#
-menuconfig BLOCK
- bool "Enable the block layer" if EXPERT
- default y
- help
- Provide block layer support for the kernel.
-
- Disable this option to remove the block layer support from the
- kernel. This may be useful for embedded devices.
-
- If this option is disabled:
-
- - block device files will become unusable
- - some filesystems (such as ext3) will become unavailable.
-
- Also, SCSI character devices and USB storage will be disabled since
- they make use of various block layer definitions and facilities.
-
- Say Y here unless you know you really don't want to mount disks and
- suchlike.
-
-if BLOCK
-
-config LBDAF
- bool "Support for large (2TB+) block devices and files"
- depends on !64BIT
- default y
- help
- Enable block devices or files of size 2TB and larger.
-
- This option is required to support the full capacity of large
- (2TB+) block devices, including RAID, disk, Network Block Device,
- Logical Volume Manager (LVM) and loopback.
-
- This option also enables support for single files larger than
- 2TB.
-
- The ext4 filesystem requires that this feature be enabled in
- order to support filesystems that have the huge_file feature
- enabled. Otherwise, it will refuse to mount in the read-write
- mode any filesystems that use the huge_file feature, which is
- enabled by default by mke2fs.ext4.
-
- The GFS2 filesystem also requires this feature.
-
- If unsure, say Y.
-
-config BLK_DEV_BSG
- bool "Block layer SG support v4"
- default y
- help
- Saying Y here will enable generic SG (SCSI generic) v4 support
- for any block device.
-
- Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
- can handle complicated SCSI commands: tagged variable length cdbs
- with bidirectional data transfers and generic request/response
- protocols (e.g. Task Management Functions and SMP in Serial
- Attached SCSI).
-
- This option is required by recent UDEV versions to properly
- access device serial numbers, etc.
-
- If unsure, say Y.
-
-config BLK_DEV_BSGLIB
- bool "Block layer SG support v4 helper lib"
- default n
- select BLK_DEV_BSG
- help
- Subsystems will normally enable this if needed. Users will not
- normally need to manually enable this.
-
- If unsure, say N.
-
-config BLK_DEV_INTEGRITY
- bool "Block layer data integrity support"
- ---help---
- Some storage devices allow extra information to be
- stored/retrieved to help protect the data. The block layer
- data integrity option provides hooks which can be used by
- filesystems to ensure better data integrity.
-
- Say yes here if you have a storage device that provides the
- T10/SCSI Data Integrity Field or the T13/ATA External Path
- Protection. If in doubt, say N.
-
-config BLK_DEV_THROTTLING
- bool "Block layer bio throttling support"
- depends on BLK_CGROUP=y && EXPERIMENTAL
- default n
- ---help---
- Block layer bio throttling support. It can be used to limit
- the IO rate to a device. IO rate policies are per cgroup and
- one needs to mount and use blkio cgroup controller for creating
- cgroups and specifying per device IO rate policies.
-
- See Documentation/cgroups/blkio-controller.txt for more information.
-
-menu "Partition Types"
-
-source "block/partitions/Kconfig"
-
-endmenu
-
-endif # BLOCK
-
-config BLOCK_COMPAT
- bool
- depends on BLOCK && COMPAT
- default y
-
-source block/Kconfig.iosched