# # Block layer core configuration # #XXX - it makes sense to enable this only for 32-bit subarch's, not for x86_64 #for instance. config LBD bool "Support for Large Block Devices" depends on X86 || (MIPS && 32BIT) || PPC32 || (S390 && !64BIT) || SUPERH || UML help Say Y here if you want to attach large (bigger than 2TB) discs to your machine, or if you want to have a raid or loopback device bigger than 2TB. Otherwise 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 user space support tools needed), fetch the blktrace app from: git://brick.kernel.dk/data/git/blktrace.git config LSF bool "Support for Large Single Files" depends on X86 || (MIPS && 32BIT) || PPC32 || ARCH_S390_31 || SUPERH || UML help Say Y here if you want to be able to handle very large files (bigger than 2TB), otherwise say N. If unsure, say Y. source block/Kconfig.iosched