Kconfig 1.7 KB

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  1. #
  2. # Block layer core configuration
  3. #
  4. config BLOCK
  5. bool "Enable the block layer" if EMBEDDED
  6. default y
  7. help
  8. This permits the block layer to be removed from the kernel if it's not
  9. needed (on some embedded devices for example). If this option is
  10. disabled, then blockdev files will become unusable and some
  11. filesystems (such as ext3) will become unavailable.
  12. This option will also disable SCSI character devices and USB storage
  13. since they make use of various block layer definitions and
  14. facilities.
  15. Say Y here unless you know you really don't want to mount disks and
  16. suchlike.
  17. if BLOCK
  18. #XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
  19. #for instance.
  20. config LBD
  21. bool "Support for Large Block Devices"
  22. depends on X86 || (MIPS && 32BIT) || PPC32 || (S390 && !64BIT) || SUPERH || UML
  23. help
  24. Say Y here if you want to attach large (bigger than 2TB) discs to
  25. your machine, or if you want to have a raid or loopback device
  26. bigger than 2TB. Otherwise say N.
  27. config BLK_DEV_IO_TRACE
  28. bool "Support for tracing block io actions"
  29. depends on SYSFS
  30. select RELAY
  31. select DEBUG_FS
  32. help
  33. Say Y here, if you want to be able to trace the block layer actions
  34. on a given queue. Tracing allows you to see any traffic happening
  35. on a block device queue. For more information (and the user space
  36. support tools needed), fetch the blktrace app from:
  37. git://brick.kernel.dk/data/git/blktrace.git
  38. config LSF
  39. bool "Support for Large Single Files"
  40. depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
  41. help
  42. Say Y here if you want to be able to handle very large files (bigger
  43. than 2TB), otherwise say N.
  44. If unsure, say Y.
  45. endif
  46. source block/Kconfig.iosched