On Tue, 22 Mar 2011 00:07:02 +0900 (JST), Ryusuke Konishi wrote:
> Also, we can make .nilfs immutable on the latest kernel in which nilfs
> supported lsattr and chattr:
> 
>  # chattr +i .nilfs
>  # rm .nilfs
>  rm: cannot remove `.nilfs': Operation not permitted
> 
> This could be another work around though I don't prefer it.

Unfortunately, this turned out to go wrong since immutable file is not
writable. 

Using a Posix semaphore looks shorter now.

Ryusuke Konishi
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