kernel_optimize_test/net/sunrpc
Tom Tucker 24b8b44780 svcrdma: Fix race between svc_rdma_recvfrom thread and the dto_tasklet
RDMA_READ completions are kept on a separate queue from the general
I/O request queue. Since a separate lock is used to protect the RDMA_READ
completion queue, a race exists between the dto_tasklet and the
svc_rdma_recvfrom thread where the dto_tasklet sets the XPT_DATA
bit and adds I/O to the read-completion queue. Concurrently, the
recvfrom thread checks the generic queue, finds it empty and resets
the XPT_DATA bit. A subsequent svc_xprt_enqueue will fail to enqueue
the transport for I/O and cause the transport to "stall".

The fix is to protect both lists with the same lock and set the XPT_DATA
bit with this lock held.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2008-08-13 16:57:31 -04:00
..
auth_gss Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linux 2008-07-20 21:21:46 -07:00
xprtrdma svcrdma: Fix race between svc_rdma_recvfrom thread and the dto_tasklet 2008-08-13 16:57:31 -04:00
auth_generic.c SUNRPC: AUTH_SYS "machine creds" shouldn't use negative valued uid/gid 2008-05-18 14:18:27 -04:00
auth_null.c NFSv4: Don't use cred->cr_ops->cr_name in nfs4_proc_setclientid() 2008-04-19 16:54:53 -04:00
auth_unix.c SUNRPC: Use GFP_NOFS when allocating credentials 2008-07-09 12:08:48 -04:00
auth.c SUNRPC: Protect creds against early garbage collection 2008-04-19 16:55:02 -04:00
cache.c sunrpc: assign PDE->data before gluing PDE into /proc tree 2008-05-02 02:44:36 -07:00
clnt.c SUNRPC: Ensure our task is notified when an rpcbind call is done 2008-07-09 12:09:45 -04:00
Makefile SUNRPC: Add a generic RPC credential 2008-03-14 13:42:38 -04:00
rpc_pipe.c SL*B: drop kmem cache argument from constructor 2008-07-26 12:00:07 -07:00
rpcb_clnt.c SUNRPC: Support registering IPv6 interfaces with local rpcbind daemon 2008-07-15 18:08:55 -04:00
sched.c SUNRPC: Remove the BKL from the callback functions 2008-07-15 18:10:57 -04:00
socklib.c SUNRPC: temp var should match return type of xdr_skb_read_actor 2008-01-30 02:05:43 -05:00
stats.c sunrpc: assign PDE->data before gluing PDE into /proc tree 2008-05-02 02:44:36 -07:00
sunrpc_syms.c SUNRPC: Move exported symbol definitions after function declaration part 2 2008-02-01 17:01:24 -05:00
svc_xprt.c svc: Remove unused header files from svc_xprt.c 2008-05-19 07:33:42 -05:00
svc.c cpumask: change cpumask_of_cpu_ptr to use new cpumask_of_cpu 2008-07-26 16:40:33 +02:00
svcauth_unix.c svcrpc: fix proc/net/rpc/auth.unix.ip/content display 2008-05-18 19:13:07 -04:00
svcauth.c SUNRPC: Move exported symbol definitions after function declaration part 2 2008-02-01 17:01:24 -05:00
svcsock.c SUNRPC: Update RPC server's TCP record marker decoder 2008-04-23 16:13:43 -04:00
sysctl.c svc: Add /proc/sys/sunrpc/transport files 2008-02-01 16:42:13 -05:00
timer.c SUNRPC: add EXPORT_SYMBOL_GPL for generic transport functions 2007-10-09 17:17:36 -04:00
xdr.c SUNRPC: don't call flush_dcache_page() with an invalid pointer 2008-04-08 21:06:50 -04:00
xprt.c SUNRPC: Ensure all transports set rq_xtime consistently 2008-07-09 12:09:15 -04:00
xprtsock.c SUNRPC: Ensure all transports set rq_xtime consistently 2008-07-09 12:09:15 -04:00