revert to double-buffering readdir
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.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Date: Thu Dec 6 16:17:12 AEDT 2007
Workarea: chook.melbourne.sgi.com:/build/dgc/isms/2.6.x-xfs
Inspected by: hch@xxxxxx
The following file(s) were checked into:
longdrop.melbourne.sgi.com:/isms/linux/2.6.x-xfs-melb
Modid: xfs-linux-melb:xfs-kern:30201a
fs/xfs/linux-2.6/xfs_file.c - 1.159 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_file.c.diff?r1=text&tr1=1.159&r2=text&tr2=1.158&f=h
- revert the readdir code to using double buffering to work around a
deadlock with nfsd calling back into the lookup code from filldir.
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