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https://github.com/torvalds/linux
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5f3ea37c77
This was a forward port of work done by Mathieu Desnoyers, I changed it to encode the 'what' parameter on the tracepoint name, so that one can register interest in specific events and not on classes of events to then check the 'what' parameter. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
104 lines
3 KiB
Text
104 lines
3 KiB
Text
#
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# Block layer core configuration
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#
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menuconfig BLOCK
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bool "Enable the block layer" if EMBEDDED
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default y
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help
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Provide block layer support for the kernel.
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Disable this option to remove the block layer support from the
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kernel. This may be useful for embedded devices.
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If this option is disabled:
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- block device files will become unusable
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- some filesystems (such as ext3) will become unavailable.
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Also, SCSI character devices and USB storage will be disabled since
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they make use of various block layer definitions and facilities.
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Say Y here unless you know you really don't want to mount disks and
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suchlike.
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if BLOCK
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config LBD
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bool "Support for Large Block Devices"
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depends on !64BIT
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help
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Enable block devices of size 2TB and larger.
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This option is required to support the full capacity of large
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(2TB+) block devices, including RAID, disk, Network Block Device,
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Logical Volume Manager (LVM) and loopback.
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For example, RAID devices are frequently bigger than the capacity
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of the largest individual hard drive.
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This option is not required if you have individual disk drives
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which total 2TB+ and you are not aggregating the capacity into
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a large block device (e.g. using RAID or LVM).
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If unsure, say N.
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config BLK_DEV_IO_TRACE
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bool "Support for tracing block io actions"
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depends on SYSFS
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select RELAY
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select DEBUG_FS
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select TRACEPOINTS
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help
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Say Y here if you want to be able to trace the block layer actions
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on a given queue. Tracing allows you to see any traffic happening
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on a block device queue. For more information (and the userspace
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support tools needed), fetch the blktrace tools from:
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git://git.kernel.dk/blktrace.git
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If unsure, say N.
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config LSF
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bool "Support for Large Single Files"
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depends on !64BIT
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help
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Say Y here if you want to be able to handle very large files (2TB
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and larger), otherwise say N.
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If unsure, say Y.
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config BLK_DEV_BSG
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bool "Block layer SG support v4 (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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---help---
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Saying Y here will enable generic SG (SCSI generic) v4 support
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for any block device.
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Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
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can handle complicated SCSI commands: tagged variable length cdbs
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with bidirectional data transfers and generic request/response
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protocols (e.g. Task Management Functions and SMP in Serial
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Attached SCSI).
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If unsure, say N.
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config BLK_DEV_INTEGRITY
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bool "Block layer data integrity support"
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---help---
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Some storage devices allow extra information to be
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stored/retrieved to help protect the data. The block layer
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data integrity option provides hooks which can be used by
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filesystems to ensure better data integrity.
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Say yes here if you have a storage device that provides the
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T10/SCSI Data Integrity Field or the T13/ATA External Path
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Protection. If in doubt, say N.
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endif # BLOCK
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config BLOCK_COMPAT
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bool
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depends on BLOCK && COMPAT
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default y
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source block/Kconfig.iosched
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