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5de55ce951
linux/net/sunrpc
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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
..
auth_gss Highlights: 2020-08-09 13:58:04 -07:00
xprtrdma xprtrdma: Release in-flight MRs on disconnect 2020-08-26 15:29:21 -04:00
addr.c net: sunrpc: Fix off-by-one issues in 'rpc_ntop6' 2020-05-27 10:08:26 -04:00
auth_null.c SUNRPC: Add rpc_auth::au_ralign field 2019-02-14 11:48:36 -05:00
auth_unix.c SUNRPC: Use the client user namespace when encoding creds 2019-04-26 16:24:32 -04:00
auth.c sunrpc: add missing newline when printing parameter 'auth_hashtable_size' by sysfs 2020-06-11 13:33:48 -04:00
backchannel_rqst.c SUNRPC: Destroy the back channel when we destroy the host transport 2019-10-30 12:04:35 -04:00
cache.c SUNRPC/cache: Fix unsafe traverse caused double-free in cache_purge 2020-04-13 10:28:21 -04:00
clnt.c SUNRPC: Set SOFTCONN when destroying GSS contexts 2020-06-11 13:33:48 -04:00
debugfs.c NFS client updates for Linux 5.3 2019-07-18 14:32:33 -07:00
Kconfig SUNRPC: Drop redundant CONFIG_ from CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES 2019-07-06 14:54:53 -04:00
Makefile SUNRPC: remove generic cred code. 2018-12-19 13:52:46 -05:00
netns.h
rpc_pipe.c sunrpc: destroy rpc_inode_cachep after unregister_filesystem 2020-07-17 13:12:44 -04:00
rpcb_clnt.c SUNRPC: Remove unreachable error condition in rpcb_getport_async() 2020-05-28 18:15:00 -04:00
sched.c SUNRPC: Don't start a timer on an already queued rpc task 2020-04-04 19:59:27 -04:00
socklib.c SUNRPC: Refactor xs_sendpages() 2020-03-16 12:04:33 -04:00
socklib.h SUNRPC: Refactor xs_sendpages() 2020-03-16 12:04:33 -04:00
stats.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
sunrpc_syms.c sunrpc: check that domain table is empty at module unload. 2020-05-28 18:15:00 -04:00
sunrpc.h sunrpc: check that domain table is empty at module unload. 2020-05-28 18:15:00 -04:00
svc_xprt.c NFS Client Updates for Linux 5.8 2020-06-11 12:22:41 -07:00
svc.c Merge branch 'nfsd-5.8' of git://linux-nfs.org/~cel/cel-2.6 into for-5.8-incoming 2020-05-21 10:58:15 -04:00
svcauth_unix.c sunrpc: Remove unused function ip_map_update 2020-05-06 16:00:11 -04:00
svcauth.c sunrpc: check that domain table is empty at module unload. 2020-05-28 18:15:00 -04:00
svcsock.c Remove uninitialized_var() macro for v5.9-rc1 2020-08-04 13:49:43 -07:00
sysctl.c sysctl: pass kernel pointers to ->proc_handler 2020-04-27 02:07:40 -04:00
timer.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
xdr.c SUNRPC: Properly set the @subbuf parameter of xdr_buf_subsegment() 2020-06-26 08:45:23 -04:00
xprt.c SUNRPC dont update timeout value on connection reset 2020-08-04 23:17:11 -04:00
xprtmultipath.c SUNRPC: Optimise transport balancing code 2019-07-18 14:43:52 -04:00
xprtsock.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00