config LBD
bool "Support for large block devices and files"
depends on !64BIT
+ default y
help
Enable block devices or files of size 2TB and larger.
This option also enables support for single files larger than
2TB.
- If unsure, say N.
+ The ext4 filesystem requires that this feature be enabled in
+ order to support filesystems that have the huge_file feature
+ enabled. Otherwise, it will refuse to mount in the read-write
+ mode any filesystems that use the huge_file feature, which is
+ enabled by default by mke2fs.ext4.
-config BLK_DEV_IO_TRACE
- bool "Support for tracing block io actions"
- depends on SYSFS
- select RELAY
- select DEBUG_FS
- select TRACEPOINTS
- 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:
+ The GFS2 filesystem also requires this feature.
- git://git.kernel.dk/blktrace.git
-
- If unsure, say N.
+ If unsure, say Y.
config BLK_DEV_BSG
bool "Block layer SG support v4 (EXPERIMENTAL)"