I am still seeing slow nfs performance and high cpu with 3.5.0-22, but found a thread suggesting a fix went into 3.5.4 in September. Haven't been able to test myself yet.
J. Bruce Fields (4):
nfsd4: fix security flavor of NFSv4.0 callback
svcrpc: fix BUG() in svc_tcp_clear_pages
svcrpc: fix svc_xprt_enqueue/svc_recv busy-looping
svcrpc: sends on closed socket should stop immediately
I am still seeing slow nfs performance and high cpu with 3.5.0-22, but found a thread suggesting a fix went into 3.5.4 in September. Haven't been able to test myself yet.
J. Bruce Fields (4): enqueue/ svc_recv busy-looping
nfsd4: fix security flavor of NFSv4.0 callback
svcrpc: fix BUG() in svc_tcp_clear_pages
svcrpc: fix svc_xprt_
svcrpc: sends on closed socket should stop immediately
http:// lwn.net/ Articles/ 516478/