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Date:      Tue, 16 Jun 2009 13:31:42 +0200 (CEST)
From:      Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To:        Ben Kelly <ben@wanderview.com>
Cc:        freebsd-hackers@freebsd.org, freebsd-current@freebsd.org, Ivan Voras <ivoras@freebsd.org>
Subject:   Re: tmpfs experimental?
Message-ID:  <alpine.BSF.2.00.0906161330470.27588@wojtek.tensor.gdynia.pl>
In-Reply-To: <4A370DB2.8070403@wanderview.com>
References:  <h162mo$jj2$1@ger.gmane.org> <4A370DB2.8070403@wanderview.com>

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> multiple times:
>
>  ianto# mount | grep ' /tmp'
>  tmpfs on /tmp (tmpfs, local)
>  ianto# mount /tmp
>  ianto# mount | grep ' /tmp'
>  tmpfs on /tmp (tmpfs, local)
>  tmpfs on /tmp (tmpfs, local)
>  ianto# umount /tmp
>  ianto# mount | grep ' /tmp'
>  tmpfs on /tmp (tmpfs, local)
>  ianto#

it's not only tmpfs. you may mount ufs readonly, or nfs multiple times on 
the same place.

It's not tmpfs specific problem IMHO. There is no checking in mount for 
that case.



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