if BLOCK
-config LBD
- bool "Support for large block devices and files"
+config LBDAF
+ bool "Support for large (2TB+) block devices and files"
depends on !64BIT
+ default y
help
Enable block devices or files of size 2TB and larger.
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 any filesystems
- that use the huge_file feature, which is enabled by default
- by mke2fs.ext4. The GFS2 filesystem also requires this feature.
-
- If unsure, say N.
-
-config BLK_DEV_IO_TRACE
- bool "Support for tracing block io actions"
- depends on SYSFS
- select RELAY
- select DEBUG_FS
- select TRACEPOINTS
- select TRACING
- select STACKTRACE
- 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:
-
- git://git.kernel.dk/blktrace.git
-
- Tracing also is possible using the ftrace interface, e.g.:
+ 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.
- echo 1 > /sys/block/sda/sda1/trace/enable
- echo blk > /sys/kernel/debug/tracing/current_tracer
- cat /sys/kernel/debug/tracing/trace_pipe
+ The GFS2 filesystem also requires this feature.
- If unsure, say N.
+ If unsure, say Y.
config BLK_DEV_BSG
- bool "Block layer SG support v4 (EXPERIMENTAL)"
- depends on EXPERIMENTAL
- ---help---
+ bool "Block layer SG support v4"
+ default y
+ help
Saying Y here will enable generic SG (SCSI generic) v4 support
for any block device.
protocols (e.g. Task Management Functions and SMP in Serial
Attached SCSI).
- If unsure, say N.
+ This option is required by recent UDEV versions to properly
+ access device serial numbers, etc.
+
+ If unsure, say Y.
config BLK_DEV_INTEGRITY
bool "Block layer data integrity support"