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kernel 3.6-rc1+ & encrypted swap under user mode linux
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toralf
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Joined: 01 Feb 2004
Posts: 2713
Location: Hamburg/Germany

PostPosted: Fri Aug 10, 2012 6:38 pm    Post subject: kernel 3.6-rc1+ & encrypted swap under user mode linux Reply with quote

With vanilla kernel 3.5.1 as host, 3.6-rc1+ as client kernel and a x86 Gentoo user mode linux image I'm wondering about this message during shutdown of the UML image guest system :
Code:
 * Deactivating swap devices ...
 [ ok ]
 * Removing dm-crypt mappings
 *   crypt-swap ...
Kernel not configured for semaphores (System V IPC). Not using udev synchronisation code.
 [ ok ]
 * Stopping udev ...
 [ ok ]


An older guest kernel (3.5) works fine. Both guest kernels have nearly identical .configs :
Code:
$ /usr/local/bin/linux-v3.5 --showconfig | grep IPC | grep -v '#'
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y

$ /usr/local/bin/linux-v3.6-rc1-207-gf4ba394 --showconfig | grep IPC | grep -v '#'
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
and cryptsetup was already recompiled using the latest used kernels.

FWIW I'm using an encrypted swap devie for the guest kernels:
Code:
$ grep ^swap dmcrypt
swap=crypt-swap
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