[Linux-cluster] Kernel Panic GFS2 and NFS

[Mahmoud Hanafi]

I am getting the following kernel panic when exporting GFS2 via NFS. When 
the client mounts and does a ls the server panics. Any one else seen this 
issue? Any ideas?

dlm: connecting to 6
dlm: got connection from 6
NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
NFSD: starting 90-second grace period
Unable to handle kernel NULL pointer dereference at 0000000000000088 RIP: 
 [<ffffffff88111069>] :gfs2:gfs2_glock_dq+0x15/0xa5
PGD 22d792067 PUD 22d77a067 PMD 0 
Oops: 0000 [1] SMP 
last sysfs file: 
/fs/gfs2/nfs_cluster:stripe4_512k/lock_module/recover_done
CPU 0 
Modules linked in: nfsd exportfs lockd nfs_acl qla2xxx lock_dlm gfs2 dlm 
configfs iptable_filter ip_tables autofs4 hidp rfcomm l2cap bluetooth 
sunrpc ip6t_REJECT xt_
tcpudp ip6table_filter ip6_tables x_tables ipv6 dm_round_robin 
dm_multipath video sbs i2c_ec i2c_core button battery asus_acpi 
acpi_memhotplug ac parport_pc lp parpo
rt joydev sr_mod sg pcspkr ib_mthca ib_mad ib_core shpchp bnx2 ide_cd 
cdrom serio_raw dm_snapshot dm_zero dm_mirror dm_mod usb_storage 
scsi_transport_fc megaraid_sas
 sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd
Pid: 29865, comm: nfsd Not tainted 2.6.18-8.el5 #1
RIP: 0010:[<ffffffff88111069>]  [<ffffffff88111069>] 
:gfs2:gfs2_glock_dq+0x15/0xa5
RSP: 0018:ffff8101f51c96e0  EFLAGS: 00010246
RAX: 0000000000000008 RBX: 0000000000000000 RCX: ffff8101f51c9cd0
RDX: ffff8101f57f2080 RSI: ffff8101f51c97b0 RDI: ffff8101f51c9720
RBP: ffff8101f51c9720 R08: ffff8101f504f014 R09: ffff8101f51c99b8
R10: ffff8101f57ad008 R11: ffffffff8811d23c R12: ffff8101f81fe780
R13: ffff8101f51c97b0 R14: 0000000000000001 R15: ffff8101f504f000
FS:  00002aaaab0146f0(0000) GS:ffffffff8038a000(0000) 
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000088 CR3: 000000022d613000 CR4: 00000000000006e0
Process nfsd (pid: 29865, threadinfo ffff8101f51c8000, task 
ffff8101f57f2080)
Stack:  0000000000000000 ffff8101f51c9720 ffff8101f51c99b0 
ffff8101f81fe780
 ffff8101f51c97b0 ffffffff8811112c 0000000000000000 ffffffff8811d2e3
 0000000000000000 0000000000000000 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff8811112c>] :gfs2:gfs2_glock_dq_uninit+0x9/0x12
 [<ffffffff8811d2e3>] :gfs2:gfs2_getattr+0xa7/0xb4
 [<ffffffff8000ddca>] vfs_getattr+0x2d/0xa9
 [<ffffffff885fb4bf>] :nfsd:encode_post_op_attr+0x3f/0x213
 [<ffffffff885fbc57>] :nfsd:encode_entry+0x232/0x53e
 [<ffffffff800bea3c>] zone_statistics+0x3e/0x6d
 [<ffffffff80086480>] enqueue_task+0x41/0x56
 [<ffffffff800864bc>] __activate_task+0x27/0x39
 [<ffffffff80044d16>] try_to_wake_up+0x407/0x418
 [<ffffffff800850dd>] __wake_up_common+0x3e/0x68
 [<ffffffff885fbf6e>] :nfsd:nfs3svc_encode_entry_plus+0xb/0x10
 [<ffffffff8811adf1>] :gfs2:filldir_func+0x22/0x86
 [<ffffffff8810bb85>] :gfs2:do_filldir_main+0x126/0x16d
 [<ffffffff8811adcf>] :gfs2:filldir_func+0x0/0x86
 [<ffffffff8810a454>] :gfs2:gfs2_dirent_gather+0x0/0x24
 [<ffffffff885fbf63>] :nfsd:nfs3svc_encode_entry_plus+0x0/0x10
 [<ffffffff8810c0ab>] :gfs2:gfs2_dir_read+0x416/0x479
 [<ffffffff8811adcf>] :gfs2:filldir_func+0x0/0x86
 [<ffffffff88126ba7>] :gfs2:gfs2_trans_end+0x14e/0x16b
 [<ffffffff885fbf63>] :nfsd:nfs3svc_encode_entry_plus+0x0/0x10
 [<ffffffff8811b559>] :gfs2:gfs2_readdir+0x98/0xbe
 [<ffffffff88112c5e>] :gfs2:gfs2_glock_nq_atime+0x14e/0x292
 [<ffffffff885fbf63>] :nfsd:nfs3svc_encode_entry_plus+0x0/0x10
 [<ffffffff8003498f>] vfs_readdir+0x77/0xa9
 [<ffffffff885fbf63>] :nfsd:nfs3svc_encode_entry_plus+0x0/0x10
 [<ffffffff885f3e12>] :nfsd:nfsd_readdir+0x6d/0xc5
 [<ffffffff885fade0>] :nfsd:nfsd3_proc_readdirplus+0xf8/0x224
 [<ffffffff885f00e9>] :nfsd:nfsd_dispatch+0xd7/0x198
 [<ffffffff884474b5>] :sunrpc:svc_process+0x43c/0x6fa
 [<ffffffff8006214d>] __down_read+0x12/0x92
 [<ffffffff885f0471>] :nfsd:nfsd+0x0/0x327
 [<ffffffff885f0624>] :nfsd:nfsd+0x1b3/0x327
 [<ffffffff8005bfe5>] child_rip+0xa/0x11
 [<ffffffff885f0471>] :nfsd:nfsd+0x0/0x327
 [<ffffffff885f0471>] :nfsd:nfsd+0x0/0x327
 [<ffffffff8005bfdb>] child_rip+0x0/0x11


Code: 4c 8b ab 88 00 00 00 74 0a 31 f6 48 89 df e8 40 fa ff ff 4c 
RIP  [<ffffffff88111069>] :gfs2:gfs2_glock_dq+0x15/0xa5
 RSP <ffff8101f51c96e0>
CR2: 0000000000000088
 <0>Kernel panic - not syncing: Fatal exception





Mahmoud Hanafi
Sr. System Administrator
CSC HPC COE
Bld. 676
2435 Fifth Street
WPAFB, Ohio 45433
(937) 255-1536



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