kernel/linux.git/include/linux/sunrpc/xprt.h, branch v3.8.8

SUNRPC: Get rid of the redundant xprt->shutdown bit field

2012-09-28T20:03:05+00:00

It is only set after everyone has dereferenced the transport, and serves no useful purpose: setting it is racy, so all the socket code, etc still needs to be able to cope with the cases where they miss reading it. Signed-off-by: Trond Myklebust

SUNRPC: Fix a UDP transport regression

2012-09-07T15:43:49+00:00

Commit 43cedbf0e8dfb9c5610eb7985d5f21263e313802 (SUNRPC: Ensure that we grab the XPRT_LOCK before calling xprt_alloc_slot) is causing hangs in the case of NFS over UDP mounts. Since neither the UDP or the RDMA transport mechanism use dynamic slot allocation, we can skip grabbing the socket lock for those transports. Add a new rpc_xprt_op to allow switching between the TCP and UDP/RDMA case. Note that the NFSv4.1 back channel assigns the slot directly through rpc_run_bc_task, so we can ignore that case. Reported-by: Dick Streefland Signed-off-by: Trond Myklebust Cc: stable@vger.kernel.org [>= 3.1]

nfs: enable swap on NFS

2012-08-01T01:42:48+00:00

Implement the new swapfile a_ops for NFS and hook up ->direct_IO. This will set the NFS socket to SOCK_MEMALLOC and run socket reconnect under PF_MEMALLOC as well as reset SOCK_MEMALLOC before engaging the protocol ->connect() method. PF_MEMALLOC should allow the allocation of struct socket and related objects and the early (re)setting of SOCK_MEMALLOC should allow us to receive the packets required for the TCP connection buildup. [jlayton@redhat.com: Restore PF_MEMALLOC task flags in all cases] [dfeng@redhat.com: Fix handling of multiple swap files] [a.p.zijlstra@chello.nl: Original patch] Signed-off-by: Mel Gorman Acked-by: Rik van Riel Cc: Christoph Hellwig Cc: David S. Miller Cc: Eric B Munson Cc: Eric Paris Cc: James Morris Cc: Mel Gorman Cc: Mike Christie Cc: Neil Brown Cc: Sebastian Andrzej Siewior Cc: Trond Myklebust Cc: Xiaotian Feng Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

SUNRPC: Move clnt->cl_server into struct rpc_xprt

2012-03-02T20:36:41+00:00

When the cl_xprt field is updated, the cl_server field will also have to change. Since the contents of cl_server follow the remote endpoint of cl_xprt, just move that field to the rpc_xprt. Signed-off-by: Trond Myklebust [ cel: simplify check_gss_callback_principal(), whitespace changes ] [ cel: forward ported to 3.4 ] Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust

SUNRPC: add sending,pending queue and max slot to xprt stats

2012-02-16T19:55:27+00:00

With static RPC slots, the xprt backlog queue stats were useful in showing when the transport (TCP) was starved by lack of RPC slots. The new dynamic RPC slot code, commit d9ba131d8f58c0d2ff5029e7002ab43f913b36f9, always provides an RPC slot and so only uses the xprt backlog queue when the tcp_max_slot_table_entries value has been hit or when an allocation error occurs. All requests are now placed on the xprt sending or pending queue which need to be monitored for debugging. The max_slot stat shows the maximum number of dynamic RPC slots reached which is useful when debugging performance issues. Add the new fields at the end of the mountstats xprt stanza so that mountstats outputs the previous correct values and ignores the new fields. Bump NFS_IOSTATS_VERS. Signed-off-by: Andy Adamson Signed-off-by: Trond Myklebust

SUNRPC: Change the default limit to the number of TCP slots

2012-02-06T23:47:35+00:00

Since the scheme of limiting the number of TCP slots to whatever will fit in the current TCP window seems to be working well (Andy reports getting within 20% of the 'iperf' send performance on a 10GigE link) we should just let that be the default mode of operation. Users may still set their own limits using the tcp_max_slot_table_entries parameter if they need to. Signed-off-by: Trond Myklebust

SUNRPC: Replace xprt->resend and xprt->sending with a priority queue

2011-07-17T22:11:34+00:00

Signed-off-by: Trond Myklebust

SUNRPC: Support dynamic slot allocation for TCP connections

2011-07-17T22:11:30+00:00

Allow the number of available slots to grow with the TCP window size. Signed-off-by: Trond Myklebust

SUNRPC: Clean up the slot table allocation

2011-07-17T20:57:32+00:00

Signed-off-by: Trond Myklebust

SUNRPC: Ensure that we grab the XPRT_LOCK before calling xprt_alloc_slot

2011-07-17T20:01:03+00:00

This throttles the allocation of new slots when the socket is busy reconnecting and/or is out of buffer space. Signed-off-by: Trond Myklebust