Commit | Line | Data |
---|---|---|
3a65dfe8 JA |
1 | # |
2 | # Block layer core configuration | |
3 | # | |
16ed002f | 4 | menuconfig BLOCK |
51d7513a | 5 | bool "Enable the block layer" if EMBEDDED |
9361401e DH |
6 | default y |
7 | help | |
ee86418d | 8 | Provide block layer support for the kernel. |
9361401e | 9 | |
ee86418d NA |
10 | Disable this option to remove the block layer support from the |
11 | kernel. This may be useful for embedded devices. | |
12 | ||
13 | If this option is disabled: | |
14 | ||
15 | - block device files will become unusable | |
16 | - some filesystems (such as ext3) will become unavailable. | |
17 | ||
18 | Also, SCSI character devices and USB storage will be disabled since | |
19 | they make use of various block layer definitions and facilities. | |
9361401e DH |
20 | |
21 | Say Y here unless you know you really don't want to mount disks and | |
22 | suchlike. | |
23 | ||
24 | if BLOCK | |
25 | ||
3a65dfe8 | 26 | config LBD |
b3a6ffe1 | 27 | bool "Support for large block devices and files" |
e6243863 | 28 | depends on !64BIT |
3a65dfe8 | 29 | help |
b3a6ffe1 | 30 | Enable block devices or files of size 2TB and larger. |
ee86418d NA |
31 | |
32 | This option is required to support the full capacity of large | |
33 | (2TB+) block devices, including RAID, disk, Network Block Device, | |
34 | Logical Volume Manager (LVM) and loopback. | |
b3a6ffe1 JA |
35 | |
36 | This option also enables support for single files larger than | |
37 | 2TB. | |
ee86418d | 38 | |
4d783b09 TT |
39 | The ext4 filesystem requires that this feature be enabled in |
40 | order to support filesystems that have the huge_file feature | |
41 | enabled. Otherwise, it will refuse to mount any filesystems | |
42 | that use the huge_file feature, which is enabled by default | |
43 | by mke2fs.ext4. The GFS2 filesystem also requires this feature. | |
44 | ||
ee86418d | 45 | If unsure, say N. |
3a65dfe8 | 46 | |
3d6392cf | 47 | config BLK_DEV_BSG |
319a7b7f | 48 | bool "Block layer SG support v4 (EXPERIMENTAL)" |
80ed71ce | 49 | depends on EXPERIMENTAL |
3d6392cf | 50 | ---help--- |
ee86418d NA |
51 | Saying Y here will enable generic SG (SCSI generic) v4 support |
52 | for any block device. | |
53 | ||
54 | Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4 | |
55 | can handle complicated SCSI commands: tagged variable length cdbs | |
56 | with bidirectional data transfers and generic request/response | |
57 | protocols (e.g. Task Management Functions and SMP in Serial | |
58 | Attached SCSI). | |
59 | ||
60 | If unsure, say N. | |
3d6392cf | 61 | |
7ba1ba12 MP |
62 | config BLK_DEV_INTEGRITY |
63 | bool "Block layer data integrity support" | |
64 | ---help--- | |
65 | Some storage devices allow extra information to be | |
66 | stored/retrieved to help protect the data. The block layer | |
67 | data integrity option provides hooks which can be used by | |
68 | filesystems to ensure better data integrity. | |
69 | ||
70 | Say yes here if you have a storage device that provides the | |
71 | T10/SCSI Data Integrity Field or the T13/ATA External Path | |
72 | Protection. If in doubt, say N. | |
73 | ||
2b9e0aae LT |
74 | endif # BLOCK |
75 | ||
99874d50 JA |
76 | config BLOCK_COMPAT |
77 | bool | |
2b9e0aae | 78 | depends on BLOCK && COMPAT |
99874d50 JA |
79 | default y |
80 | ||
3a65dfe8 | 81 | source block/Kconfig.iosched |