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Re: CVS commit: src/sys

On Apr 27, 2013, at 12:27 AM, Michael van Elst <> 

> Module Name:  src
> Committed By: mlelstv
> Date:         Fri Apr 26 22:27:17 UTC 2013
> Modified Files:
>       src/sys/kern: vfs_mount.c
>       src/sys/sys: mount.h
> Log Message:
> Correct umount semantics to return EBUSY when a filesystem is busy
> instead of failing filesystem operations with EBUSY when attempting
> an umount.
> This fixes kern/38141.

Who did the review or where has it been discussed?

We now get a deadlock between mountlist_lock and mnt_unmounting,
seen between dounmount() and do_sys_sync() for example.

The lock order is mountlist_lock->mnt_unmounting, but dounmount()
locks in reverse direction.

Please fix or revert.

J. Hannken-Illjes - - TU Braunschweig 

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