- For example, RAID devices are frequently bigger than the capacity
- of the largest individual hard drive.
-
- This option is not required if you have individual disk drives
- which total 2TB+ and you are not aggregating the capacity into
- a large block device (e.g. using RAID or LVM).
-
- If unsure, say N.
-
-config BLK_DEV_IO_TRACE
- bool "Support for tracing block io actions"
- depends on SYSFS
- select RELAY
- select DEBUG_FS
- 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
+ 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.