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Hi there! |
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|
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I want to shrink [*] a partition that holds a 32-bit Gentoo chroot. But |
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I cannot unmount it, the device is busy because proc and /dev is |
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bind-mounted there. And I cannot unmount this /dev, again, the device is |
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busy: |
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|
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weird ~ # umount /32/dev |
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umount: /32/dev: device is busy. |
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(In some cases useful info about processes that use |
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the device is found by lsof(8) or fuser(1)) |
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|
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lsof /32/dev gives a lot of stuff, the same that lsof /dev gives. lsof |
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/proc also has some lines, but I had no problem unmounting /32/proc. |
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|
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I could remove the /32/dev entry from fstab and reboot, but I need the |
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machine up at the moment, and I'm also curious why this is a problem. |
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Maybe you know? |
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|
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[*] BTW, I just wrote a script so automatize this. It shrinks the file |
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system, then reduces the logical volume. It also reduces the size of a |
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LUKS crypto volume on the LVM. |
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Enlarging also works, but that already is easy using lvresize, |
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cryptsetup resize and resize2fs. Shrinking is more tricky though, you |
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have to calculate the sizes, and things could break if the underlying |
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partition is made too small. |
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|
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Wonko |
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