Jens Axboe | 3a65dfe | 2005-11-04 08:43:35 +0100 | [diff] [blame] | 1 | # |
| 2 | # Block layer core configuration |
| 3 | # |
Jan Engelhardt | 16ed002 | 2007-07-10 12:24:11 +0200 | [diff] [blame] | 4 | menuconfig BLOCK |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 5 | bool "Enable the block layer" if EXPERT |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 6 | default y |
Omar Sandoval | 8845964 | 2016-09-17 08:38:44 -0600 | [diff] [blame] | 7 | select SBITMAP |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 8 | help |
Nick Andrew | ee86418 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 9 | Provide block layer support for the kernel. |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 10 | |
Nick Andrew | ee86418 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 11 | Disable this option to remove the block layer support from the |
| 12 | kernel. This may be useful for embedded devices. |
| 13 | |
| 14 | If this option is disabled: |
| 15 | |
| 16 | - block device files will become unusable |
| 17 | - some filesystems (such as ext3) will become unavailable. |
| 18 | |
| 19 | Also, SCSI character devices and USB storage will be disabled since |
| 20 | they make use of various block layer definitions and facilities. |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 21 | |
| 22 | Say Y here unless you know you really don't want to mount disks and |
| 23 | suchlike. |
| 24 | |
| 25 | if BLOCK |
| 26 | |
Bartlomiej Zolnierkiewicz | 90c699a | 2009-06-19 08:08:50 +0200 | [diff] [blame] | 27 | config LBDAF |
| 28 | bool "Support for large (2TB+) block devices and files" |
Matthew Wilcox | e624386 | 2006-12-04 03:38:31 -0700 | [diff] [blame] | 29 | depends on !64BIT |
Bartlomiej Zolnierkiewicz | db29a6b | 2009-04-21 09:27:03 +0200 | [diff] [blame] | 30 | default y |
Jens Axboe | 3a65dfe | 2005-11-04 08:43:35 +0100 | [diff] [blame] | 31 | help |
Jens Axboe | b3a6ffe | 2008-12-12 09:51:16 +0100 | [diff] [blame] | 32 | Enable block devices or files of size 2TB and larger. |
Nick Andrew | ee86418 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 33 | |
| 34 | This option is required to support the full capacity of large |
| 35 | (2TB+) block devices, including RAID, disk, Network Block Device, |
| 36 | Logical Volume Manager (LVM) and loopback. |
Jens Axboe | b3a6ffe | 2008-12-12 09:51:16 +0100 | [diff] [blame] | 37 | |
| 38 | This option also enables support for single files larger than |
| 39 | 2TB. |
Nick Andrew | ee86418 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 40 | |
Theodore Ts'o | 4d783b0 | 2009-01-06 15:16:33 -0500 | [diff] [blame] | 41 | The ext4 filesystem requires that this feature be enabled in |
| 42 | order to support filesystems that have the huge_file feature |
Bartlomiej Zolnierkiewicz | db29a6b | 2009-04-21 09:27:03 +0200 | [diff] [blame] | 43 | enabled. Otherwise, it will refuse to mount in the read-write |
| 44 | mode any filesystems that use the huge_file feature, which is |
| 45 | enabled by default by mke2fs.ext4. |
Theodore Ts'o | 4d783b0 | 2009-01-06 15:16:33 -0500 | [diff] [blame] | 46 | |
Bartlomiej Zolnierkiewicz | db29a6b | 2009-04-21 09:27:03 +0200 | [diff] [blame] | 47 | The GFS2 filesystem also requires this feature. |
| 48 | |
| 49 | If unsure, say Y. |
Jens Axboe | 3a65dfe | 2005-11-04 08:43:35 +0100 | [diff] [blame] | 50 | |
Jens Axboe | 3d6392c | 2007-07-09 12:38:05 +0200 | [diff] [blame] | 51 | config BLK_DEV_BSG |
John Stoffel | 14d9fa3 | 2009-08-04 22:10:17 +0200 | [diff] [blame] | 52 | bool "Block layer SG support v4" |
| 53 | default y |
| 54 | help |
Nick Andrew | ee86418 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 55 | Saying Y here will enable generic SG (SCSI generic) v4 support |
| 56 | for any block device. |
FUJITA Tomonori | 319a7b7 | 2007-07-17 12:22:09 +0200 | [diff] [blame] | 57 | |
Nick Andrew | ee86418 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 58 | Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4 |
| 59 | can handle complicated SCSI commands: tagged variable length cdbs |
| 60 | with bidirectional data transfers and generic request/response |
| 61 | protocols (e.g. Task Management Functions and SMP in Serial |
| 62 | Attached SCSI). |
| 63 | |
John Stoffel | 14d9fa3 | 2009-08-04 22:10:17 +0200 | [diff] [blame] | 64 | This option is required by recent UDEV versions to properly |
| 65 | access device serial numbers, etc. |
| 66 | |
| 67 | If unsure, say Y. |
Jens Axboe | 3d6392c | 2007-07-09 12:38:05 +0200 | [diff] [blame] | 68 | |
Mike Christie | aa387cc | 2011-07-31 22:05:09 +0200 | [diff] [blame] | 69 | config BLK_DEV_BSGLIB |
| 70 | bool "Block layer SG support v4 helper lib" |
| 71 | default n |
| 72 | select BLK_DEV_BSG |
| 73 | help |
| 74 | Subsystems will normally enable this if needed. Users will not |
| 75 | normally need to manually enable this. |
| 76 | |
| 77 | If unsure, say N. |
| 78 | |
Martin K. Petersen | 7ba1ba1 | 2008-06-30 20:04:41 +0200 | [diff] [blame] | 79 | config BLK_DEV_INTEGRITY |
| 80 | bool "Block layer data integrity support" |
Martin K. Petersen | 2341c2f8 | 2014-09-26 19:20:07 -0400 | [diff] [blame] | 81 | select CRC_T10DIF if BLK_DEV_INTEGRITY |
Martin K. Petersen | 7ba1ba1 | 2008-06-30 20:04:41 +0200 | [diff] [blame] | 82 | ---help--- |
| 83 | Some storage devices allow extra information to be |
| 84 | stored/retrieved to help protect the data. The block layer |
| 85 | data integrity option provides hooks which can be used by |
| 86 | filesystems to ensure better data integrity. |
| 87 | |
| 88 | Say yes here if you have a storage device that provides the |
| 89 | T10/SCSI Data Integrity Field or the T13/ATA External Path |
| 90 | Protection. If in doubt, say N. |
| 91 | |
Vivek Goyal | e43473b | 2010-09-15 17:06:35 -0400 | [diff] [blame] | 92 | config BLK_DEV_THROTTLING |
| 93 | bool "Block layer bio throttling support" |
Kees Cook | 8e42e0a | 2012-10-23 13:01:46 -0700 | [diff] [blame] | 94 | depends on BLK_CGROUP=y |
Vivek Goyal | e43473b | 2010-09-15 17:06:35 -0400 | [diff] [blame] | 95 | default n |
| 96 | ---help--- |
| 97 | Block layer bio throttling support. It can be used to limit |
| 98 | the IO rate to a device. IO rate policies are per cgroup and |
| 99 | one needs to mount and use blkio cgroup controller for creating |
| 100 | cgroups and specifying per device IO rate policies. |
| 101 | |
| 102 | See Documentation/cgroups/blkio-controller.txt for more information. |
| 103 | |
Paul Gortmaker | 080506a | 2013-09-30 13:45:19 -0700 | [diff] [blame] | 104 | config BLK_CMDLINE_PARSER |
Cai Zhiyong | bab5541 | 2013-09-11 14:20:09 -0700 | [diff] [blame] | 105 | bool "Block device command line partition parser" |
| 106 | default n |
| 107 | ---help--- |
Paul Gortmaker | 080506a | 2013-09-30 13:45:19 -0700 | [diff] [blame] | 108 | Enabling this option allows you to specify the partition layout from |
| 109 | the kernel boot args. This is typically of use for embedded devices |
| 110 | which don't otherwise have any standardized method for listing the |
| 111 | partitions on a block device. |
| 112 | |
| 113 | See Documentation/block/cmdline-partition.txt for more information. |
Cai Zhiyong | bab5541 | 2013-09-11 14:20:09 -0700 | [diff] [blame] | 114 | |
Al Viro | 9be96f3 | 2011-09-16 00:25:05 -0400 | [diff] [blame] | 115 | menu "Partition Types" |
| 116 | |
| 117 | source "block/partitions/Kconfig" |
| 118 | |
| 119 | endmenu |
| 120 | |
Linus Torvalds | 2b9e0aa | 2007-10-12 17:58:36 -0700 | [diff] [blame] | 121 | endif # BLOCK |
| 122 | |
Jens Axboe | 99874d5 | 2007-10-12 12:50:41 +0200 | [diff] [blame] | 123 | config BLOCK_COMPAT |
| 124 | bool |
Linus Torvalds | 2b9e0aa | 2007-10-12 17:58:36 -0700 | [diff] [blame] | 125 | depends on BLOCK && COMPAT |
Jens Axboe | 99874d5 | 2007-10-12 12:50:41 +0200 | [diff] [blame] | 126 | default y |
| 127 | |
Stephen Rothwell | 8ec2ef2 | 2016-09-19 15:50:16 +1000 | [diff] [blame] | 128 | config BLK_MQ_PCI |
| 129 | bool |
| 130 | depends on BLOCK && PCI |
| 131 | default y |
| 132 | |
Jens Axboe | 3a65dfe | 2005-11-04 08:43:35 +0100 | [diff] [blame] | 133 | source block/Kconfig.iosched |