On Sun, Nov 25, 2007 at 04:30:14PM +0000, Christoph Hellwig wrote:

quoted text
> The current readdir implementation deadlocks on a btree buffers
> locks because nfsd calls back into ->lookup from the filldir
> callback.  The only short-term fix for this is to revert to the old
> inefficient double-buffering scheme.

This seems to work really well here.

quoted text
> This patch does exactly that and reverts xfs_file_readdir to what's
> basically the 2.6.23 version minus the uio and vnops junk.

This should probably be submitted for inclusion stable-2.6.24.
Perhaps a version with the #if 0 [...]  stuff dropped?  (I'm happy to
send a patch for that if you prefer).
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