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Date:      Fri, 15 Dec 2006 19:54:25 -0500
From:      John Merryweather Cooper <john_m_cooper@yahoo.com>
To:        Kostik Belousov <kostikbel@gmail.com>
Cc:        stable@freebsd.org, Ulrich Spoerlein <uspoerlein@gmail.com>, bug-followup@freebsd.org
Subject:   Re: kern/92785: Using exported filesystem on OS/2 NFS client causes filesystem freeze
Message-ID:  <458343C1.7090502@yahoo.com>
In-Reply-To: <20061215142809.GC23698@deviant.kiev.zoral.com.ua>
References:  <7ad7ddd90612150444ifd95974gf429a7f22c177508@mail.gmail.com>	<20061215131545.GB23698@deviant.kiev.zoral.com.ua>	<7ad7ddd90612150612k1b7933f1u22826c96b4938726@mail.gmail.com> <20061215142809.GC23698@deviant.kiev.zoral.com.ua>

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Kostik Belousov wrote:
> On Fri, Dec 15, 2006 at 03:12:58PM +0100, Ulrich Spoerlein wrote:
>   
>> A tcpdump of the session can be found at:
>> http://coyote.dnsalias.net/rpc.pcap (9kB)
>>
>>     
> Am I right that all you did was ls -l <root of nfs mount> ? Does OS/2
> supports the notion of ".." directory ? Could you do just "ls -l .."
> from nfs client and then try "stat <root of exported fs>" on the server
> (i think it shall hang) ?
>
> My hypothesis is that LOOKUP RPC for ".." causes directory vnode lock
> leak in nfs_namei. After that, mountd hang is just consequence.
>   
Yes, OS/2 supports the ".." directory.  FAT, HPFS, and JFS all have a 
".." directory.

jmc




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