From: Dominique DELANDE (Dominique.Delande_at_spectro.jussieu.fr)
Date: Wed Oct 29 2008 - 02:11:40 PST
Dear Sir or Madam,
I am using blcr-0.7.3 to checkpoint MPI jobs, compiled either
with MVAPICH2-1.2rc2 or OpenMPI-1.3b1. In both cases,
checkpointing is apparently working, but restart ends
with a kernel oops on each node running a MPI process (see below).
The kernel oops is similar when using OpenMPI or MVAPICH2, I thus
suspect that the problem comes from blcr.
I am running Linux Fedora 8 with a 2.6.26 Fedora x86_64 kernel.
Each node has two Dual Core AMD Opteron Processors 285 with 8 GBytes
of memory, Infiniband DDR, and the OFED-1.4-rc3 stack.
Any help will be appreciated.
Best regards
Dominique Delande
*******************************
Ouput of 'uname -a':
Linux node11.cluster.local 2.6.26.6-49.fc8 #1 SMP Fri Oct 17 15:33:32
EDT 2008 x86_64 x86_64 x86_64 GNU/Linux
Example:
$ cr_restart context.20722
node11 kernel: Oops: 0002 [1] SMP
node11 kernel: Code: 48 8b 11 31 c0 c3 48 83 e9 07 eb 00 31 d2 48 c7
c0 f2 ff ff ff c3 90 90 90 90 90 90 90 90 90 90 48 89 f8 89 d1 c1 e9 03
83 e2 07 <f3> 48 a5 89 d1 f3 a4 c3 66 66 66 66 2e 0f 1f 84 00 00 00 00 00
node11 kernel: CR2: 0000000000000000
dmesg output is:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
IP: [<ffffffff81140d1b>] memcpy_c+0xb/0x20
PGD 22e4ed067 PUD 22dccf067 PMD 0
Oops: 0002 [1] SMP
CPU 1
Modules linked in: blcr(U) blcr_vmadump(U) blcr_imports(U) nfs lockd
nfs_acl sunrpc rdma_ucm(U) ib_sdp(U) rdma_cm(U) iw_cm(U) ib_addr(U)
ib_ipoib(U) ib_cm(U) ib_sa(U) ipv6 ib_uverbs(U) ib_umad(U) mlx4_ib(U)
mlx4_core(U) dm_mirror dm_log dm_multipath dm_mod cfi_cmdset_0002
cfi_util tg3 jedec_probe cfi_probe ib_mthca(U) gen_probe ib_mad(U)
ck804xrom ib_core(U) mtd k8temp i2c_nforce2 i2c_core pcspkr chipreg
hwmon shpchp map_funcs sr_mod cdrom sg pata_amd ata_generic pata_acpi
sata_nv libata sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd
ehci_hcd [last unloaded: scsi_wait_scan]
Pid: 20789, comm: cr_restart Not tainted 2.6.26.6-49.fc8 #1
RIP: 0010:[<ffffffff81140d1b>] [<ffffffff81140d1b>] memcpy_c+0xb/0x20
RSP: 0018:ffff81022e4c7770 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000040
RDX: 0000000000000000 RSI: ffff81022e4c7788 RDI: 0000000000000000
RBP: ffff81022e4c7b58 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff81022e4c7788
R13: ffff810128c2a240 R14: 0000000000000000 R15: ffffffffffffffff
FS: 00007f4cabcdc6f0(0000) GS:ffff81022fa25300(0000) knlGS:0000000055788b90
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000012e96b000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process cr_restart (pid: 20789, threadinfo ffff81022e4c6000, task
ffff81022e4596a0)
Stack: ffffffffa0334524 0000000000000000 0000000000000000 000000000000037f
0000000000000000 0000000000000000 0000ffff00009fc0 0000000000000000
0000000000000000 0000000000000000 0000000000000000 0000000000000000
Call Trace:
[<ffffffffa0334524>] ? :blcr_vmadump:vmadump_restore_cpu+0x197/0x5b4
[<ffffffff810aa7a0>] ? do_sync_read+0xe2/0x126
[<ffffffff810492dc>] ? autoremove_wake_function+0x0/0x38
[<ffffffff8100c12a>] ? system_call_after_swapgs+0x8a/0x8f
[<ffffffffa0332048>] ? :blcr_vmadump:read_user+0x48/0x72
[<ffffffffa0333846>] :blcr_vmadump:vmadump_thaw_proc+0x169/0xb6b
[<ffffffff8102fb8d>] ? hrtick_set+0xe0/0xe9
[<ffffffff8129748d>] ? thread_return+0x7e/0xab
[<ffffffffa03455dc>] :blcr:cr_thaw_threads+0x18d/0x1f1
[<ffffffff810492dc>] ? autoremove_wake_function+0x0/0x38
[<ffffffffa0343413>] :blcr:cr_rstrt_child+0xa1e/0x1ca2
[<ffffffffa033e0b8>] ? :blcr:ctrl_ioctl+0x0/0x1bc
[<ffffffffa033e22f>] :blcr:ctrl_ioctl+0x177/0x1bc
[<ffffffff810e8aae>] proc_reg_unlocked_ioctl+0xa6/0xc6
[<ffffffff810b6aaa>] vfs_ioctl+0x2a/0x77
[<ffffffff810b6d45>] do_vfs_ioctl+0x24e/0x26b
[<ffffffff8100a92a>] ? __switch_to+0xd8/0x376
[<ffffffff810b6db9>] sys_ioctl+0x57/0x7a
[<ffffffff8100c12a>] system_call_after_swapgs+0x8a/0x8f
Code: 48 8b 11 31 c0 c3 48 83 e9 07 eb 00 31 d2 48 c7 c0 f2 ff ff ff c3
90 90 90 90 90 90 90 90 90 90 48 89 f8 89 d1 c1 e9 03 83 e2 07 <f3> 48
a5 89 d1 f3 a4 c3 66 66 66 66 2e 0f 1f 84 00 00 00 00 00
RIP [<ffffffff81140d1b>] memcpy_c+0xb/0x20
RSP <ffff81022e4c7770>
CR2: 0000000000000000
---[ end trace 6c22587b3026d5be ]---
blcr: rstrt_watchdog: 'cr_restart' (tgid/pid 20788/20789) exited with
signal 9 during restart
--
Dominique Delande ([email protected])
Laboratoire Kastler-Brossel - Case 74 - Universite P. et M. Curie
4, place Jussieu, F-75252 Paris Cedex 05, FRANCE
Phone : 33 (0)1 44 27 27 97 - Fax : 33 (0)1 44 27 38 45
Acces : Pyramide de la Scolarite Paris VI - 1er etage - Bureau 214