NULL d_parent and ceph, nfs sillyrename regressions

[Sage Weil]

Hi Nick,

Any progress of fixing the d_parent behavior that's breaking ceph and 
sillyrename?  Just a reminder: ceph currently oopses on d_kill, and 
sillyrename entries don't go away.  Your message from 3 weeks ago 
suggested the fix was relatively simple and imminent, but it's getting 
late in the cycle and I'm getting nervous :).

We do have an ugly hack[1] that will fix the ceph problem (by making a 
copy of d_parent in the d_fsdata struct), but I'd obviously rather not 
push that.

FWIW the d_parent clearing in d_kill was introduced by 949854d0.

Thanks!
sage


[1] http://ceph.newdream.net/git/?p=ceph-client.git;a=commitdiff;h=9c3db357aa3de6fd5e3ef2865e20848251aa05a4
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