Chuck Lever 5de55ce951 xprtrdma: Release in-flight MRs on disconnect ...

Dan Aloni reports that when a server disconnects abruptly, a few
memory regions are left DMA mapped. Over time this leak could pin
enough I/O resources to slow or even deadlock an NFS/RDMA client.

I found that if a transport disconnects before pending Send and
FastReg WRs can be posted, the to-be-registered MRs are stranded on
the req's rl_registered list and never released -- since they
weren't posted, there's no Send completion to DMA unmap them.

Reported-by: Dan Aloni <dan@kernelim.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

2020-08-26 15:29:21 -04:00

..

backchannel.c

xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt

2020-03-27 10:47:25 -04:00

frwr_ops.c

svcrdma: Add common XDR decoders for RDMA and Read segments

2020-07-13 17:28:24 -04:00

Makefile

xprtrdma: Remove support for FMR memory registration

2019-01-02 12:05:17 -05:00

module.c

NFS client updates for Linux 4.18

2018-06-12 10:09:03 -07:00

rpc_rdma.c

Highlights:

2020-08-09 13:58:04 -07:00

svc_rdma_backchannel.c

svcrdma: Record send_ctxt completion ID in trace_svcrdma_post_send()

2020-07-13 17:28:24 -04:00

svc_rdma_recvfrom.c

svcrdma: Remove transport reference counting

2020-07-28 10:18:14 -04:00

svc_rdma_rw.c

svcrdma: Remove transport reference counting

2020-07-28 10:18:14 -04:00

svc_rdma_sendto.c

svcrdma: Remove transport reference counting

2020-07-28 10:18:14 -04:00

svc_rdma_transport.c

svcrdma: CM event handler clean up

2020-07-28 10:18:15 -04:00

svc_rdma.c

sysctl: pass kernel pointers to ->proc_handler

2020-04-27 02:07:40 -04:00

transport.c

xprtrdma: Fix recursion into rpcrdma_xprt_disconnect()

2020-07-13 10:50:41 -04:00

verbs.c

xprtrdma: Release in-flight MRs on disconnect

2020-08-26 15:29:21 -04:00

xprt_rdma.h

xprtrdma: Clean up disconnect

2020-06-22 09:34:35 -04:00