[openib-general] nfsrdma release 7 issues,

[Vu Pham]

James,
  Beside the double page free issue that Tom already fixed, I see the 
following issues:
1. simultaneous nfsrdmamount from multiple host issue. I see the 
following error messages
...
Dec 12 13:31:40 ibd202 kernel: svcrdma: QP event 4 received for 
QP=ffff810240f5fa00
Dec 12 13:34:17 ibd202 kernel: svcrdma: QP event 4 received for 
QP=ffff810240f5f000
Dec 12 13:34:17 ibd202 kernel: svcrdma: QP event 4 received for 
QP=ffff810242cfa400

2.  While some clients run I/Os, one idle client try to access the mount 
point ie. *ls* and get I/O input error. I see these error messages on 
server log

Dec 12 13:58:29 ibd202 kernel: nfsd: terminating on error 22
Dec 12 13:58:29 ibd202 kernel: svcrdma: bad WR completion
Dec 12 13:58:29 ibd202 kernel:  ctxt=ffff810242130800, count=1 on 
xprt=ffff8102431c0400, rqstp=ffff8102414cdc00, status=5
...
Dec 12 14:04:29 ibd202 kernel: ib_mthca 0000:08:00.0: CQ entry for 
unknown QP 2e0408

Then the mount point is inaccessible from all clients

3. performance issue - I got max 450 MB/s  read from server cache 
(comparing to 800 MB/s with release 6, using the same hw configuration 
for both client/server)

thanks,
-vu