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linux-2.6/net/rds
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jeff.liu 5175a5e76b RDS: fix rds-ping spinlock recursion 
This is the revised patch for fixing rds-ping spinlock recursion
according to Venkat's suggestions.

RDS ping/pong over TCP feature has been broken for years(2.6.39 to
3.6.0) since we have to set TCP cork and call kernel_sendmsg() between
ping/pong which both need to lock "struct sock *sk". However, this
lock has already been hold before rds_tcp_data_ready() callback is
triggerred. As a result, we always facing spinlock resursion which
would resulting in system panic.

Given that RDS ping is only used to test the connectivity and not for
serious performance measurements, we can queue the pong transmit to
rds_wq as a delayed response.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
CC: Venkat Venkatsubra <venkat.x.venkatsubra@oracle.com>
CC: David S. Miller <davem@davemloft.net>
CC: James Morris <james.l.morris@oracle.com>
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2012-10-09 13:57:23 -04:00
..
Kconfig rds: drop "select LLIST" 2011-11-14 00:10:50 -05:00
Makefile Net: rds: Makefile: Remove deprecated items 2010-11-22 08:16:15 -08:00
af_rds.c rds: Make rds_sock_lock BH rather than IRQ safe. 2012-01-24 17:03:44 -05:00
bind.c net/rds: use prink_ratelimited() instead of printk_ratelimit() 2011-06-17 00:03:03 -04:00
cong.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
connection.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
ib.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
ib.h rds_rdma: don't assume infiniband device is PCI 2012-05-29 17:30:07 -04:00
ib_cm.c RDS: use gfp flags from caller in conn_alloc() 2012-03-22 19:29:58 -04:00
ib_rdma.c net, rds, Replace xlist in net/rds/xlist.h with llist 2011-09-15 15:36:32 -04:00
ib_recv.c Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
ib_ring.c RDS/IW+IB: Set recv ring low water mark to 1/2 full. 2009-04-09 17:21:14 -07:00
ib_send.c net/rds: use prink_ratelimited() instead of printk_ratelimit() 2011-06-17 00:03:03 -04:00
ib_stats.c RDS: Move atomic stats from general to ib-specific area 2010-09-08 18:12:20 -07:00
ib_sysctl.c net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
info.c rds: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:28 +08:00
info.h RDS: Info and stats 2009-02-26 23:39:25 -08:00
iw.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
iw.h net: remove interrupt.h inclusion from netdevice.h 2011-06-06 22:55:11 -07:00
iw_cm.c RDS: use gfp flags from caller in conn_alloc() 2012-03-22 19:29:58 -04:00
iw_rdma.c RDS: Remove some unused iWARP code 2012-01-12 20:05:28 -08:00
iw_recv.c Merge branch 'kmap_atomic' of git://github.com/congwang/linux 2012-03-21 09:40:26 -07:00
iw_ring.c RDS/IW+IB: Set recv ring low water mark to 1/2 full. 2009-04-09 17:21:14 -07:00
iw_send.c net/rds: use prink_ratelimited() instead of printk_ratelimit() 2011-06-17 00:03:03 -04:00
iw_stats.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2009-09-15 09:39:44 -07:00
iw_sysctl.c net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
loop.c RDS: use gfp flags from caller in conn_alloc() 2012-03-22 19:29:58 -04:00
loop.h RDS: loopback 2009-02-26 23:39:26 -08:00
message.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
page.c net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
rdma.c rds: Integer overflow in RDS cmsg handling 2010-11-17 12:20:52 -08:00
rdma_transport.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
rdma_transport.h rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
rds.h rds: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:28 +08:00
recv.c rds: set correct msg_namelen 2012-07-23 01:01:44 -07:00
send.c RDS: fix rds-ping spinlock recursion 2012-10-09 13:57:23 -04:00
stats.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
sysctl.c net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
tcp.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
tcp.h rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
tcp_connect.c rds: Don't disable BH on BH context 2012-08-22 22:52:04 -07:00
tcp_listen.c rds: Don't disable BH on BH context 2012-08-22 22:52:04 -07:00
tcp_recv.c rds: Don't disable BH on BH context 2012-08-22 22:52:04 -07:00
tcp_send.c rds: Don't disable BH on BH context 2012-08-22 22:52:04 -07:00
tcp_stats.c net: rds: fix const array syntax 2011-07-01 16:16:19 -07:00
threads.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
transport.c RDS: have sockets get transport module references 2010-09-08 18:16:47 -07:00