Kconfig 2.4 KB

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  1. #
  2. # Block layer core configuration
  3. #
  4. menuconfig BLOCK
  5. bool "Enable the block layer" if EMBEDDED
  6. default y
  7. help
  8. Provide block layer support for the kernel.
  9. Disable this option to remove the block layer support from the
  10. kernel. This may be useful for embedded devices.
  11. If this option is disabled:
  12. - block device files will become unusable
  13. - some filesystems (such as ext3) will become unavailable.
  14. Also, SCSI character devices and USB storage will be disabled since
  15. they make use of various block layer definitions and facilities.
  16. Say Y here unless you know you really don't want to mount disks and
  17. suchlike.
  18. if BLOCK
  19. config LBD
  20. bool "Support for large block devices and files"
  21. depends on !64BIT
  22. help
  23. Enable block devices or files of size 2TB and larger.
  24. This option is required to support the full capacity of large
  25. (2TB+) block devices, including RAID, disk, Network Block Device,
  26. Logical Volume Manager (LVM) and loopback.
  27. This option also enables support for single files larger than
  28. 2TB.
  29. The ext4 filesystem requires that this feature be enabled in
  30. order to support filesystems that have the huge_file feature
  31. enabled. Otherwise, it will refuse to mount any filesystems
  32. that use the huge_file feature, which is enabled by default
  33. by mke2fs.ext4. The GFS2 filesystem also requires this feature.
  34. If unsure, say N.
  35. config BLK_DEV_BSG
  36. bool "Block layer SG support v4 (EXPERIMENTAL)"
  37. depends on EXPERIMENTAL
  38. ---help---
  39. Saying Y here will enable generic SG (SCSI generic) v4 support
  40. for any block device.
  41. Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
  42. can handle complicated SCSI commands: tagged variable length cdbs
  43. with bidirectional data transfers and generic request/response
  44. protocols (e.g. Task Management Functions and SMP in Serial
  45. Attached SCSI).
  46. If unsure, say N.
  47. config BLK_DEV_INTEGRITY
  48. bool "Block layer data integrity support"
  49. ---help---
  50. Some storage devices allow extra information to be
  51. stored/retrieved to help protect the data. The block layer
  52. data integrity option provides hooks which can be used by
  53. filesystems to ensure better data integrity.
  54. Say yes here if you have a storage device that provides the
  55. T10/SCSI Data Integrity Field or the T13/ATA External Path
  56. Protection. If in doubt, say N.
  57. endif # BLOCK
  58. config BLOCK_COMPAT
  59. bool
  60. depends on BLOCK && COMPAT
  61. default y
  62. source block/Kconfig.iosched