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Jens Axboe3a65dfe2005-11-04 08:43:35 +01001#
2# Block layer core configuration
3#
David Howells93614012006-09-30 20:45:40 +02004config BLOCK
Jens Axboe51d75132006-09-30 21:14:05 +02005 bool "Enable the block layer" if EMBEDDED
David Howells93614012006-09-30 20:45:40 +02006 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
13 This option will also disable SCSI character devices and USB storage
14 since they make use of various block layer definitions and
15 facilities.
16
17 Say Y here unless you know you really don't want to mount disks and
18 suchlike.
19
20if BLOCK
21
Jens Axboe3a65dfe2005-11-04 08:43:35 +010022#XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64
23#for instance.
24config LBD
25 bool "Support for Large Block Devices"
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -080026 depends on X86 || (MIPS && 32BIT) || PPC32 || (S390 && !64BIT) || SUPERH || UML
Jens Axboe3a65dfe2005-11-04 08:43:35 +010027 help
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.
31
Jens Axboe2056a782006-03-23 20:00:26 +010032config BLK_DEV_IO_TRACE
33 bool "Support for tracing block io actions"
Jens Axboe09540e62006-03-26 14:32:09 +020034 depends on SYSFS
Jens Axboe2056a782006-03-23 20:00:26 +010035 select RELAY
36 select DEBUG_FS
37 help
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:
42
43 git://brick.kernel.dk/data/git/blktrace.git
44
Takashi Satoa0f62ac2006-03-26 01:37:52 -080045config LSF
46 bool "Support for Large Single Files"
47 depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML
Takashi Satoa0f62ac2006-03-26 01:37:52 -080048 help
Trond Myklebust88b9adb2006-03-31 02:30:46 -080049 Say Y here if you want to be able to handle very large files (bigger
50 than 2TB), otherwise say N.
51
52 If unsure, say Y.
Takashi Satoa0f62ac2006-03-26 01:37:52 -080053
David Howells93614012006-09-30 20:45:40 +020054endif
55
Jens Axboe3a65dfe2005-11-04 08:43:35 +010056source block/Kconfig.iosched