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c14d86e591
linux/net/sunrpc
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Chuck Lever c14d86e591 xprtrdma: Acquire MRs in rpcrdma_register_external() 
Acquiring 64 MRs in rpcrdma_buffer_get() while holding the buffer
pool lock is expensive, and unnecessary because most modern adapters
can transfer 100s of KBs of payload using just a single MR.

Instead, acquire MRs one-at-a-time as chunks are registered, and
return them to rb_mws immediately during deregistration.

Note: commit 539431a437 ("xprtrdma: Don't invalidate FRMRs if
registration fails") is reverted: There is now a valid case where
registration can fail (with -ENOMEM) but the QP is still in RTS.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2015-06-12 13:10:37 -04:00
..
auth_gss svcrpc: fix potential GSSX_ACCEPT_SEC_CONTEXT decoding failures 2015-05-04 12:02:40 -04:00
xprtrdma xprtrdma: Acquire MRs in rpcrdma_register_external() 2015-06-12 13:10:37 -04:00
addr.c replace strict_strto calls 2014-07-12 18:45:49 -04:00
auth_generic.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
auth_null.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
auth_unix.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
auth.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
backchannel_rqst.c SUNRPC: Always manipulate rpc_rqst::rq_bc_pa_list under xprt->bc_pa_lock 2015-02-13 17:41:10 -05:00
bc_svc.c SUNRPC: remove BUG_ON from bc_send 2012-11-04 14:43:41 -05:00
cache.c lib/string_helpers.c: change semantics of string_escape_mem 2015-04-15 16:35:24 -07:00
clnt.c sunrpc: make debugfs file creation failure non-fatal 2015-04-23 14:42:27 -04:00
debugfs.c sunrpc: make debugfs file creation failure non-fatal 2015-04-23 14:42:27 -04:00
Kconfig kernel: conditionally support non-root users, groups and capabilities 2015-04-15 16:35:22 -07:00
Makefile sunrpc: add debugfs file for displaying client rpc_task queue 2014-11-27 13:14:51 -05:00
netns.h Merge branch 'for-3.14' of git://linux-nfs.org/~bfields/linux 2014-01-30 10:18:43 -08:00
rpc_pipe.c VFS: net/: d_inode() annotations 2015-04-15 15:06:56 -04:00
rpcb_clnt.c SUNRPC: NULL utsname dereference on NFS umount during namespace cleanup 2015-02-03 16:40:17 -05:00
sched.c SUNRPC: fix build-warning due to format missmatch 2015-03-13 09:05:20 -04:00
socklib.c net: Save software checksum complete 2014-06-11 15:46:13 -07:00
stats.c sunrpc: add rpc_count_iostats_idx 2015-02-03 11:06:38 -08:00
sunrpc_syms.c sunrpc: make debugfs file creation failure non-fatal 2015-04-23 14:42:27 -04:00
sunrpc.h SUNRPC: track whether a request is coming from a loop-back interface. 2014-05-22 15:59:18 -04:00
svc_xprt.c sunrpc/lockd: fix references to the BKL 2015-01-23 10:29:12 -05:00
svc.c sunrpc/lockd: fix references to the BKL 2015-01-23 10:29:12 -05:00
svcauth_unix.c svcrpc: fix failures to handle -1 uid's 2013-07-08 17:27:23 -04:00
svcauth.c nfsd4: better reservation of head space for krb5 2014-05-30 17:32:17 -04:00
svcsock.c get rid of the size argument of sock_sendmsg() 2015-04-11 15:27:37 -04:00
sysctl.c sunrpc: eliminate RPC_DEBUG 2014-11-24 17:31:46 -05:00
timer.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
xdr.c rpc: fix xdr_truncate_encode to handle buffer ending on page boundary 2015-01-07 14:03:58 -05:00
xprt.c Merge branch 'bugfixes' 2015-04-23 15:16:27 -04:00
xprtsock.c SUNRPC: Cleanup to remove xs_tcp_close() 2015-02-10 11:06:04 -05:00