mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 22:21:40 +00:00
ef51042472
For configurations that do not enable DAX filesystems or drivers, do not require the DAX core to be built. Given that the 'direct_access' method has been removed from 'block_device_operations', we can also go ahead and remove the block-related dax helper functions from fs/block_dev.c to drivers/dax/super.c. This keeps dax details out of the block layer and lets the DAX core be built as a module in the FS_DAX=n case. Filesystems need to include dax.h to call bdev_dax_supported(). Cc: linux-xfs@vger.kernel.org Cc: Jens Axboe <axboe@kernel.dk> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: "Darrick J. Wong" <darrick.wong@oracle.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Jan Kara <jack@suse.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
198 lines
5.6 KiB
Plaintext
198 lines
5.6 KiB
Plaintext
#
|
|
# Block layer core configuration
|
|
#
|
|
menuconfig BLOCK
|
|
bool "Enable the block layer" if EXPERT
|
|
default y
|
|
select SBITMAP
|
|
select SRCU
|
|
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_SCSI_REQUEST
|
|
bool
|
|
|
|
config BLK_DEV_BSG
|
|
bool "Block layer SG support v4"
|
|
default y
|
|
select BLK_SCSI_REQUEST
|
|
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_BSGLIB
|
|
bool "Block layer SG support v4 helper lib"
|
|
default n
|
|
select BLK_DEV_BSG
|
|
select BLK_SCSI_REQUEST
|
|
help
|
|
Subsystems will normally enable this if needed. Users will not
|
|
normally need to manually enable this.
|
|
|
|
If unsure, say N.
|
|
|
|
config BLK_DEV_INTEGRITY
|
|
bool "Block layer data integrity support"
|
|
select CRC_T10DIF if BLK_DEV_INTEGRITY
|
|
---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_DEV_ZONED
|
|
bool "Zoned block device support"
|
|
---help---
|
|
Block layer zoned block device support. This option enables
|
|
support for ZAC/ZBC host-managed and host-aware zoned block devices.
|
|
|
|
Say yes here if you have a ZAC or ZBC storage device.
|
|
|
|
config BLK_DEV_THROTTLING
|
|
bool "Block layer bio throttling support"
|
|
depends on BLK_CGROUP=y
|
|
default n
|
|
---help---
|
|
Block layer bio throttling support. It can be used to limit
|
|
the IO rate to a device. IO rate policies are per cgroup and
|
|
one needs to mount and use blkio cgroup controller for creating
|
|
cgroups and specifying per device IO rate policies.
|
|
|
|
See Documentation/cgroups/blkio-controller.txt for more information.
|
|
|
|
config BLK_CMDLINE_PARSER
|
|
bool "Block device command line partition parser"
|
|
default n
|
|
---help---
|
|
Enabling this option allows you to specify the partition layout from
|
|
the kernel boot args. This is typically of use for embedded devices
|
|
which don't otherwise have any standardized method for listing the
|
|
partitions on a block device.
|
|
|
|
See Documentation/block/cmdline-partition.txt for more information.
|
|
|
|
config BLK_WBT
|
|
bool "Enable support for block device writeback throttling"
|
|
default n
|
|
---help---
|
|
Enabling this option enables the block layer to throttle buffered
|
|
background writeback from the VM, making it more smooth and having
|
|
less impact on foreground operations. The throttling is done
|
|
dynamically on an algorithm loosely based on CoDel, factoring in
|
|
the realtime performance of the disk.
|
|
|
|
config BLK_WBT_SQ
|
|
bool "Single queue writeback throttling"
|
|
default n
|
|
depends on BLK_WBT
|
|
---help---
|
|
Enable writeback throttling by default on legacy single queue devices
|
|
|
|
config BLK_WBT_MQ
|
|
bool "Multiqueue writeback throttling"
|
|
default y
|
|
depends on BLK_WBT
|
|
---help---
|
|
Enable writeback throttling by default on multiqueue devices.
|
|
Multiqueue currently doesn't have support for IO scheduling,
|
|
enabling this option is recommended.
|
|
|
|
config BLK_DEBUG_FS
|
|
bool "Block layer debugging information in debugfs"
|
|
default y
|
|
depends on DEBUG_FS
|
|
---help---
|
|
Include block layer debugging information in debugfs. This information
|
|
is mostly useful for kernel developers, but it doesn't incur any cost
|
|
at runtime.
|
|
|
|
Unless you are building a kernel for a tiny system, you should
|
|
say Y here.
|
|
|
|
config BLK_SED_OPAL
|
|
bool "Logic for interfacing with Opal enabled SEDs"
|
|
---help---
|
|
Builds Logic for interfacing with Opal enabled controllers.
|
|
Enabling this option enables users to setup/unlock/lock
|
|
Locking ranges for SED devices using the Opal protocol.
|
|
|
|
menu "Partition Types"
|
|
|
|
source "block/partitions/Kconfig"
|
|
|
|
endmenu
|
|
|
|
endif # BLOCK
|
|
|
|
config BLOCK_COMPAT
|
|
bool
|
|
depends on BLOCK && COMPAT
|
|
default y
|
|
|
|
config BLK_MQ_PCI
|
|
bool
|
|
depends on BLOCK && PCI
|
|
default y
|
|
|
|
config BLK_MQ_VIRTIO
|
|
bool
|
|
depends on BLOCK && VIRTIO
|
|
default y
|
|
|
|
source block/Kconfig.iosched
|