kern/92785: Using exported filesystem on OS/2 NFS client causes filesystem freeze

John Merryweather Cooper john_m_cooper at
Fri Dec 15 16:54:28 PST 2006

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:
>> (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.


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