2 # Block layer core configuration
5 bool "Enable the block layer" if EMBEDDED
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.
13 This option will also disable SCSI character devices and USB storage
14 since they make use of various block layer definitions and
17 Say Y here unless you know you really don't want to mount disks and
22 #XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
25 bool "Support for Large Block Devices"
26 depends on X86 || (MIPS && 32BIT) || PPC32 || (S390 && !64BIT) || SUPERH || UML
28 Say Y here if you want to attach large (bigger than 2TB) discs to
29 your machine, or if you want to have a raid or loopback device
30 bigger than 2TB. Otherwise say N.
32 config BLK_DEV_IO_TRACE
33 bool "Support for tracing block io actions"
38 Say Y here, if you want to be able to trace the block layer actions
39 on a given queue. Tracing allows you to see any traffic happening
40 on a block device queue. For more information (and the user space
41 support tools needed), fetch the blktrace app from:
43 git://brick.kernel.dk/data/git/blktrace.git
46 bool "Support for Large Single Files"
47 depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
49 Say Y here if you want to be able to handle very large files (bigger
50 than 2TB), otherwise say N.
56 source block/Kconfig.iosched