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linux/net/rds
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Neil Horman 6094628bfd rds: prevent BUG_ON triggering on congestion map updates 
Recently had this bug halt reported to me:

kernel BUG at net/rds/send.c:329!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=1024 NUMA pSeries
Modules linked in: rds sunrpc ipv6 dm_mirror dm_region_hash dm_log ibmveth sg
ext4 jbd2 mbcache sd_mod crc_t10dif ibmvscsic scsi_transport_srp scsi_tgt
dm_mod [last unloaded: scsi_wait_scan]
NIP: d000000003ca68f4 LR: d000000003ca67fc CTR: d000000003ca8770
REGS: c000000175cab980 TRAP: 0700   Not tainted  (2.6.32-118.el6.ppc64)
MSR: 8000000000029032 <EE,ME,CE,IR,DR>  CR: 44000022  XER: 00000000
TASK = c00000017586ec90[1896] 'krdsd' THREAD: c000000175ca8000 CPU: 0
GPR00: 0000000000000150 c000000175cabc00 d000000003cb7340 0000000000002030
GPR04: ffffffffffffffff 0000000000000030 0000000000000000 0000000000000030
GPR08: 0000000000000001 0000000000000001 c0000001756b1e30 0000000000010000
GPR12: d000000003caac90 c000000000fa2500 c0000001742b2858 c0000001742b2a00
GPR16: c0000001742b2a08 c0000001742b2820 0000000000000001 0000000000000001
GPR20: 0000000000000040 c0000001742b2814 c000000175cabc70 0800000000000000
GPR24: 0000000000000004 0200000000000000 0000000000000000 c0000001742b2860
GPR28: 0000000000000000 c0000001756b1c80 d000000003cb68e8 c0000001742b27b8
NIP [d000000003ca68f4] .rds_send_xmit+0x4c4/0x8a0 [rds]
LR [d000000003ca67fc] .rds_send_xmit+0x3cc/0x8a0 [rds]
Call Trace:
[c000000175cabc00] [d000000003ca67fc] .rds_send_xmit+0x3cc/0x8a0 [rds]
(unreliable)
[c000000175cabd30] [d000000003ca7e64] .rds_send_worker+0x54/0x100 [rds]
[c000000175cabdb0] [c0000000000b475c] .worker_thread+0x1dc/0x3c0
[c000000175cabed0] [c0000000000baa9c] .kthread+0xbc/0xd0
[c000000175cabf90] [c000000000032114] .kernel_thread+0x54/0x70
Instruction dump:
4bfffd50 60000000 60000000 39080001 935f004c f91f0040 41820024 813d017c
7d094a78 7d290074 7929d182 394a0020 <0b090000> 40e2ff68 4bffffa4 39200000
Kernel panic - not syncing: Fatal exception
Call Trace:
[c000000175cab560] [c000000000012e04] .show_stack+0x74/0x1c0 (unreliable)
[c000000175cab610] [c0000000005a365c] .panic+0x80/0x1b4
[c000000175cab6a0] [c00000000002fbcc] .die+0x21c/0x2a0
[c000000175cab750] [c000000000030000] ._exception+0x110/0x220
[c000000175cab910] [c000000000004b9c] program_check_common+0x11c/0x180

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-08 11:22:43 -08:00
..
af_rds.c RDS/IB: print string constants in more places 2010-09-08 18:16:50 -07:00
bind.c rds: Use RCU for the bind lookup searches 2010-09-08 18:15:08 -07:00
cong.c RDS: Bypass workqueue when queueing cong updates 2010-09-08 18:12:16 -07:00
connection.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
ib_cm.c rds: double unlock in rds_ib_cm_handle_connect() 2010-09-19 11:59:44 -07:00
ib_rdma.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
ib_recv.c RDS/IB: print string constants in more places 2010-09-08 18:16:50 -07:00
ib_ring.c
ib_send.c rds: prevent BUG_ON triggering on congestion map updates 2011-03-08 11:22:43 -08:00
ib_stats.c RDS: Move atomic stats from general to ib-specific area 2010-09-08 18:12:20 -07:00
ib_sysctl.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
ib.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
ib.h rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
info.c RDS: cleanup: remove "== NULL"s and "!= NULL"s in ptr comparisons 2010-09-08 18:11:32 -07:00
info.h
iw_cm.c RDS: cleanup: remove "== NULL"s and "!= NULL"s in ptr comparisons 2010-09-08 18:11:32 -07:00
iw_rdma.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
iw_recv.c RDS: remove __init and __exit annotation 2010-09-08 18:16:39 -07:00
iw_ring.c
iw_send.c RDS: Rename data op members prefix from m_ to op_ 2010-09-08 18:11:59 -07:00
iw_stats.c
iw_sysctl.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
iw.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
iw.h rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
Kconfig
loop.c rds: prevent BUG_ON triggering on congestion map updates 2011-03-08 11:22:43 -08:00
loop.h
Makefile Net: rds: Makefile: Remove deprecated items 2010-11-22 08:16:15 -08:00
message.c rds: Fix rds message leak in rds_message_map_pages 2010-11-08 12:17:09 -08:00
page.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-10-21 08:43:05 -07:00
rdma_transport.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
rdma_transport.h rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
rdma.c rds: Integer overflow in RDS cmsg handling 2010-11-17 12:20:52 -08:00
rds.h rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
recv.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
send.c RDS: Let rds_message_alloc_sgs() return NULL 2010-10-30 16:34:18 -07:00
stats.c RDS: remove __init and __exit annotation 2010-09-08 18:16:39 -07:00
sysctl.c RDS: remove __init and __exit annotation 2010-09-08 18:16:39 -07:00
tcp_connect.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-09-27 01:03:03 -07:00
tcp_listen.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-09-27 01:03:03 -07:00
tcp_recv.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
tcp_send.c rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
tcp_stats.c
tcp.c rds: Remove kfreed tcp conn from list 2010-11-03 18:50:07 -07:00
tcp.h rds: make local functions/variables static 2010-10-21 04:26:39 -07:00
threads.c RDS: remove __init and __exit annotation 2010-09-08 18:16:39 -07:00
transport.c RDS: have sockets get transport module references 2010-09-08 18:16:47 -07:00
xlist.h RDS: Remove unused XLIST_PTR_TAIL and xlist_protect() 2010-09-08 18:16:06 -07:00