|author||Bartlomiej Zolnierkiewicz <firstname.lastname@example.org>||2009-04-21 09:27:03 +0200|
|committer||Jens Axboe <email@example.com>||2009-04-28 07:37:33 +0200|
block: enable by default support for large devices and files on 32-bit archs
Enable by default support for large devices and files (CONFIG_LBD): - With 1TB disks being a commodity hardware it is quite easy to hit 2TB limitation while building RAIDs etc. and many distros have been using CONFIG_LBD=y by default already (at least Fedora 10 and openSUSE 11.1). - This should also prevent a subtle ext4 filesystem compatibility issue: mke2fs.ext4 defaults to creating filesystems with huge_files feature enabled and such filesystems cannot be later mounted read-write on machines with CONFIG_LBD=n (it should be quite easy to hit this issue when trying to use filesystem created using distro kernel on system running the self-build kernel, think about USB disk enclosures & co.). While at it: - Clarify config option help text w.r.t. mounting ext4 filesystems (they can be mounted with CONFIG_LBD=n but in the read-only mode). Cc: "Theodore Ts'o" <firstname.lastname@example.org> Signed-off-by: Bartlomiej Zolnierkiewicz <email@example.com> Signed-off-by: Jens Axboe <firstname.lastname@example.org>
Diffstat (limited to 'block/Kconfig')
1 files changed, 7 insertions, 4 deletions
diff --git a/block/Kconfig b/block/Kconfig
index e7d1278..2c39527 100644
@@ -26,6 +26,7 @@ if BLOCK
bool "Support for large block devices and files"
depends on !64BIT
+ default y
Enable block devices or files of size 2TB and larger.
@@ -38,11 +39,13 @@ config LBD
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 any filesystems
- that use the huge_file feature, which is enabled by default
- by mke2fs.ext4. The GFS2 filesystem also requires this 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.
- If unsure, say N.
+ The GFS2 filesystem also requires this feature.
+ If unsure, say Y.
bool "Block layer SG support v4 (EXPERIMENTAL)"