[dm-devel] multipath oops

[christophe.varoqui at free.fr]

pour reference, here is the oops I mentionned earlier, happening when
portdisabling on a brocade switch during streaming read on a multipath map :

(kernel 2.6.10-rc1-udm2)

SCSI error : <2 0 2 3> return code = 0x10000
SCSI error : <2 0 2 3> return code = 0x10000
SCSI error : <2 0 2 3> return code = 0x10000
SCSI error : <2 0 2 2> return code = 0x10000
SCSI error : <2 0 2 2> return code = 0x10000
SCSI error : <2 0 2 2> return code = 0x10000
device-mapper: dm-multipath: error getting device
device-mapper: error adding target to table
Device sde not ready.
end_request: I/O error, dev sde, sector 4493616
Device sdb not ready.
end_request: I/O error, dev sdb, sector 4493616
Unable to handle kernel paging request at ffffff000005e1b7 RIP:
[<ffffff000005e1b7>]
PML4 3c6063 PGD fbb07067 PMD fbb06067 PTE 80000000cc144163
Oops: 0011 [1] SMP
CPU 1
Modules linked in: dm_round_robin af_packet iscsi_sfnet ipv6 smbfs lpfc
scsi_transport_fc i2c_amd756 i2c_core hw_random amd74xx evdev ohci_hcd tg3
ide_generic ide_cd ide_core cdrom ext3 jbd mbcache sd_mod dm_multipath dm_mod
mptscsih scsi_mod mptbase unix
Pid: 7, comm: events/1 Not tainted 2.6.10-rc1
RIP: 0010:[<ffffff000005e1b7>] [<ffffff000005e1b7>]
RSP: 0018:0000010004f8de60  EFLAGS: 00010247
RAX: ffffff000005e1af RBX: 00000100f8899a78 RCX: 0000010004f8ded0
RDX: ffffff000005e1b1 RSI: 0000000000000212 RDI: 00000100f8899a00
RBP: 00000100f8899a80 R08: 0000010004f8c000 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000000 R12: 0000010004f64880
R13: 0000000000000212 R14: 00000100f8899a00 R15: ffffff000005e1b7
FS:  0000000040037970(0000) GS:ffffffff803b9500(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: ffffff000005e1b7 CR3: 0000000004dfa000 CR4: 00000000000006e0
Process events/1 (pid: 7, threadinfo 0000010004f8c000, task 00000100fba32070)
Stack: ffffffff80143548 0000010004f648c0 0000010004f64898 0000010004f648a8
       ffffffffffffffff 0000000000000001 0000000000000000 ffffffff8012f1cc
       0000000000010000 0000000000000000
Call Trace:<ffffffff80143548>{worker_thread+501}
<ffffffff8012f1cc>{default_wake_function+0}
       <ffffffff8012f1cc>{default_wake_function+0}
<ffffffff80143353>{worker_thread+0}
       <ffffffff801472e1>{kthread+218} <ffffffff80110f93>{child_rip+8}
       <ffffffff80147207>{kthread+0} <ffffffff80110f8b>{child_rip+0}


Code: ff ff 05 00 00 ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00
RIP [<ffffff000005e1b7>] RSP <0000010004f8de60>
CR2: ffffff000005e1b7
 SCSI error : <2 0 2 2> return code = 0x10000
SCSI error : <2 0 2 2> return code = 0x10000


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