31e4c28d95
o This is basic implementation of blkio controller cgroup interface. This is the common interface visible to user space and should be used by different IO control policies as we implement those. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
101 lines
2.9 KiB
Plaintext
101 lines
2.9 KiB
Plaintext
#
|
|
# Block layer core configuration
|
|
#
|
|
menuconfig BLOCK
|
|
bool "Enable the block layer" if EMBEDDED
|
|
default y
|
|
help
|
|
Provide block layer support for the kernel.
|
|
|
|
Disable this option to remove the block layer support from the
|
|
kernel. This may be useful for embedded devices.
|
|
|
|
If this option is disabled:
|
|
|
|
- block device files will become unusable
|
|
- some filesystems (such as ext3) will become unavailable.
|
|
|
|
Also, SCSI character devices and USB storage will be disabled since
|
|
they make use of various block layer definitions and facilities.
|
|
|
|
Say Y here unless you know you really don't want to mount disks and
|
|
suchlike.
|
|
|
|
if BLOCK
|
|
|
|
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.
|
|
|
|
This option is required to support the full capacity of large
|
|
(2TB+) block devices, including RAID, disk, Network Block Device,
|
|
Logical Volume Manager (LVM) and loopback.
|
|
|
|
This option also enables support for single files larger than
|
|
2TB.
|
|
|
|
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.
|
|
|
|
The GFS2 filesystem also requires this feature.
|
|
|
|
If unsure, say Y.
|
|
|
|
config BLK_DEV_BSG
|
|
bool "Block layer SG support v4"
|
|
default y
|
|
help
|
|
Saying Y here will enable generic SG (SCSI generic) v4 support
|
|
for any block device.
|
|
|
|
Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
|
|
can handle complicated SCSI commands: tagged variable length cdbs
|
|
with bidirectional data transfers and generic request/response
|
|
protocols (e.g. Task Management Functions and SMP in Serial
|
|
Attached SCSI).
|
|
|
|
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"
|
|
---help---
|
|
Some storage devices allow extra information to be
|
|
stored/retrieved to help protect the data. The block layer
|
|
data integrity option provides hooks which can be used by
|
|
filesystems to ensure better data integrity.
|
|
|
|
Say yes here if you have a storage device that provides the
|
|
T10/SCSI Data Integrity Field or the T13/ATA External Path
|
|
Protection. If in doubt, say N.
|
|
|
|
config BLK_CGROUP
|
|
bool
|
|
depends on CGROUPS
|
|
default n
|
|
---help---
|
|
Generic block IO controller cgroup interface. This is the common
|
|
cgroup interface which should be used by various IO controlling
|
|
policies.
|
|
|
|
Currently, CFQ IO scheduler uses it to recognize task groups and
|
|
control disk bandwidth allocation (proportional time slice allocation)
|
|
to such task groups.
|
|
|
|
endif # BLOCK
|
|
|
|
config BLOCK_COMPAT
|
|
bool
|
|
depends on BLOCK && COMPAT
|
|
default y
|
|
|
|
source block/Kconfig.iosched
|