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Commit | Line | Data |
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3a65dfe8 JA |
1 | # |
2 | # Block layer core configuration | |
3 | # | |
16ed002f | 4 | menuconfig BLOCK |
6a108a14 | 5 | bool "Enable the block layer" if EXPERT |
9361401e | 6 | default y |
88459642 | 7 | select SBITMAP |
9361401e | 8 | help |
ee86418d | 9 | Provide block layer support for the kernel. |
9361401e | 10 | |
ee86418d NA |
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. | |
9361401e DH |
21 | |
22 | Say Y here unless you know you really don't want to mount disks and | |
23 | suchlike. | |
24 | ||
25 | if BLOCK | |
26 | ||
90c699a9 BZ |
27 | config LBDAF |
28 | bool "Support for large (2TB+) block devices and files" | |
e6243863 | 29 | depends on !64BIT |
db29a6b4 | 30 | default y |
3a65dfe8 | 31 | help |
b3a6ffe1 | 32 | Enable block devices or files of size 2TB and larger. |
ee86418d NA |
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. | |
b3a6ffe1 JA |
37 | |
38 | This option also enables support for single files larger than | |
39 | 2TB. | |
ee86418d | 40 | |
4d783b09 TT |
41 | The ext4 filesystem requires that this feature be enabled in |
42 | order to support filesystems that have the huge_file feature | |
db29a6b4 BZ |
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. | |
4d783b09 | 46 | |
db29a6b4 BZ |
47 | The GFS2 filesystem also requires this feature. |
48 | ||
49 | If unsure, say Y. | |
3a65dfe8 | 50 | |
3d6392cf | 51 | config BLK_DEV_BSG |
14d9fa35 JS |
52 | bool "Block layer SG support v4" |
53 | default y | |
54 | help | |
ee86418d NA |
55 | Saying Y here will enable generic SG (SCSI generic) v4 support |
56 | for any block device. | |
57 | ||
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 | ||
14d9fa35 JS |
64 | This option is required by recent UDEV versions to properly |
65 | access device serial numbers, etc. | |
66 | ||
67 | If unsure, say Y. | |
3d6392cf | 68 | |
aa387cc8 MC |
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 | ||
7ba1ba12 MP |
79 | config BLK_DEV_INTEGRITY |
80 | bool "Block layer data integrity support" | |
2341c2f8 | 81 | select CRC_T10DIF if BLK_DEV_INTEGRITY |
7ba1ba12 MP |
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 | ||
e43473b7 VG |
92 | config BLK_DEV_THROTTLING |
93 | bool "Block layer bio throttling support" | |
8e42e0a2 | 94 | depends on BLK_CGROUP=y |
e43473b7 VG |
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 | ||
080506ad | 104 | config BLK_CMDLINE_PARSER |
bab55417 CZ |
105 | bool "Block device command line partition parser" |
106 | default n | |
107 | ---help--- | |
080506ad PG |
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. | |
bab55417 | 114 | |
9be96f3f AV |
115 | menu "Partition Types" |
116 | ||
117 | source "block/partitions/Kconfig" | |
118 | ||
119 | endmenu | |
120 | ||
2b9e0aae LT |
121 | endif # BLOCK |
122 | ||
99874d50 JA |
123 | config BLOCK_COMPAT |
124 | bool | |
2b9e0aae | 125 | depends on BLOCK && COMPAT |
99874d50 JA |
126 | default y |
127 | ||
8ec2ef2b SR |
128 | config BLK_MQ_PCI |
129 | bool | |
130 | depends on BLOCK && PCI | |
131 | default y | |
132 | ||
3a65dfe8 | 133 | source block/Kconfig.iosched |