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block: Add Kconfig help which notes that ext4 needs CONFIG_LBD
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: Jens Axboe <jens.axboe@oracle.com>
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@ -36,6 +36,12 @@ config LBD
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This option also enables support for single files larger than
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2TB.
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The ext4 filesystem requires that this feature be enabled in
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order to support filesystems that have the huge_file feature
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enabled. Otherwise, it will refuse to mount any filesystems
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that use the huge_file feature, which is enabled by default
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by mke2fs.ext4. The GFS2 filesystem also requires this feature.
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If unsure, say N.
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config BLK_DEV_IO_TRACE
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