| # | |
| # Block layer core configuration | |
| # | |
| menuconfig BLOCK | |
| bool "Enable the block layer" if EMBEDDED | |
| 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 LBD | |
| bool "Support for Large Block Devices" | |
| depends on !64BIT | |
| help | |
| Enable block devices 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. | |
| For example, RAID devices are frequently bigger than the capacity | |
| of the largest individual hard drive. | |
| This option is not required if you have individual disk drives | |
| which total 2TB+ and you are not aggregating the capacity into | |
| a large block device (e.g. using RAID or LVM). | |
| If unsure, say N. | |
| config BLK_DEV_IO_TRACE | |
| bool "Support for tracing block io actions" | |
| depends on SYSFS | |
| select RELAY | |
| select DEBUG_FS | |
| help | |
| Say Y here if you want to be able to trace the block layer actions | |
| on a given queue. Tracing allows you to see any traffic happening | |
| on a block device queue. For more information (and the userspace | |
| support tools needed), fetch the blktrace tools from: | |
| git://git.kernel.dk/blktrace.git | |
| If unsure, say N. | |
| config LSF | |
| bool "Support for Large Single Files" | |
| depends on !64BIT | |
| help | |
| Say Y here if you want to be able to handle very large files (2TB | |
| and larger), otherwise say N. | |
| If unsure, say Y. | |
| config BLK_DEV_BSG | |
| bool "Block layer SG support v4 (EXPERIMENTAL)" | |
| depends on EXPERIMENTAL | |
| ---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). | |
| If unsure, say N. | |
| endif # BLOCK | |
| config BLOCK_COMPAT | |
| bool | |
| depends on BLOCK && COMPAT | |
| default y | |
| source block/Kconfig.iosched |