mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-11-18 15:44:02 +08:00
67523c48aa
Modify the Block I/O cgroup subsystem to be able to be built as a module. As the CFQ disk scheduler optionally depends on blk-cgroup, config options in block/Kconfig, block/Kconfig.iosched, and block/blk-cgroup.h are enhanced to support the new module dependency. Signed-off-by: Ben Blum <bblum@andrew.cmu.edu> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Paul Menage <menage@google.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
110 lines
3.1 KiB
Plaintext
110 lines
3.1 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
|
|
tristate
|
|
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.
|
|
|
|
config DEBUG_BLK_CGROUP
|
|
bool
|
|
depends on BLK_CGROUP
|
|
default n
|
|
---help---
|
|
Enable some debugging help. Currently it stores the cgroup path
|
|
in the blk group which can be used by cfq for tracing various
|
|
group related activity.
|
|
|
|
endif # BLOCK
|
|
|
|
config BLOCK_COMPAT
|
|
bool
|
|
depends on BLOCK && COMPAT
|
|
default y
|
|
|
|
source block/Kconfig.iosched
|