swapon: (man) iomap for swapfile is already supported by kernel
... since commit 67482129cdabf7cede1301d2415ef4f0156d35cd (Linus' tree). Signed-off-by: Karel Zak <kzak@redhat.com>
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@ -137,7 +137,7 @@ without the assistance of the filesystem. This is a problem on files with holes
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or another commands), or on files on copy-on-write filesystems like
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or another commands), or on files on copy-on-write filesystems like
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.BR btrfs .
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.BR btrfs .
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In some cases preallocated files (e.g. fallocate(1) on XFS) maybe interpreted
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In some cases preallocated files (e.g. fallocate(1) on XFS) maybe interpreted
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by kernel as files with holes too. The most portable solution is to use
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by old kernel versions as files with holes too. The most portable solution is to use
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.BR dd (1)
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.BR dd (1)
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and /dev/zero in these cases.
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and /dev/zero in these cases.
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.sp
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.sp
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