The main purpose of this series is to address connection drop
recovery issues by fixing FRMR re-use to make it less likely the
client will deadlock due to a memory management operation error.
Some clean-ups and other fixes are present as well.
See topic branch nfs-rdma-for-3.17 in
git://git.linux-nfs.org/projects/cel/cel-2.6.git
I tested with NFSv3 and NFSv4 on all three supported memory
registration modes. Used cthon04, iozone, and dbench with both
Solaris and Linux NFS/RDMA servers. Used xfstests with Linux.
v2:
Many patches from v1 have been written or replaced.
The MW ref counting approach in v1 is abandoned. Instead, I've
eliminated signaling FAST_REG_MR and LOCAL_INV, and added
appropriate recovery mechanisms after a transport reconnect that
should prevent rkey dis-synchrony entirely.
A couple of optimizations have been added, including:
- Allocating each MW separately rather than carving each out of a
large piece of contiguous memory
- Now that the receive CQ upcall handler dequeues a bundle of CQEs
at once, fire off the reply handler tasklet just once per upcall
to reduce context switches and how often hard IRQs are disabled
Jury is still out on the latter.
---
Chuck Lever (21):
xprtrdma: Fix panic in rpcrdma_register_frmr_external()
xprtrdma: Protect ia->ri_id when unmapping/invalidating MRs
xprtrdma: Limit data payload size for ALLPHYSICAL
xprtrdma: Update rkeys after transport reconnect
xprtrdma: On disconnect, don't ignore pending CQEs
xprtrdma: Don't invalidate FRMRs if registration fails
xprtrdma: Unclutter struct rpcrdma_mr_seg
xprtrdma: Back off rkey when FAST_REG_MR fails
xprtrdma: Chain together all MWs in same buffer pool
xprtrdma: Properly handle exhaustion of the rb_mws list
xprtrdma: Reset FRMRs when FAST_REG_MR is flushed by a disconnect
xprtrdma: Reset FRMRs after a flushed LOCAL_INV Work Request
xprtrdma: Don't post a LOCAL_INV in rpcrdma_register_frmr_external()
xprtrdma: Disable completions for FAST_REG_MR Work Requests
xprtrdma: Disable completions for LOCAL_INV Work Requests
xprtrdma: Rename frmr_wr
xprtrdma: Allocate each struct rpcrdma_mw separately
xprtrdma: Schedule reply tasklet once per upcall
xprtrdma: Make rpcrdma_ep_disconnect() return void
xprtrdma: Remove RPCRDMA_PERSISTENT_REGISTRATION macro
xprtrdma: Handle additional connection events
include/linux/sunrpc/xprtrdma.h | 2
net/sunrpc/xprtrdma/rpc_rdma.c | 83 ++--
net/sunrpc/xprtrdma/transport.c | 17 +
net/sunrpc/xprtrdma/verbs.c | 758 +++++++++++++++++++++++++++------------
net/sunrpc/xprtrdma/xprt_rdma.h | 61 +++
5 files changed, 618 insertions(+), 303 deletions(-)
--
Chuck Lever
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
