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Re: [Linux-cluster] gfs/iscsi over 2.6.11 and gfs listener



> Which branch did you pull this from? CVS HEAD is currently highly unstable.
> FC4 is recommended.
>
> It looks like the SM_RETRY is still in sm_barrier.c:add_barrier_callback -
> that should have come out on most branches by now.

I tested both cvs head and cvs RHEL4, i do not know anythink about FC4.
Why so many branches??? Which of them is definitively more stable?

Howewer *IT SEEMS* recompiling 2.6.11 without PREEMPTIBLE KERNEL avoids the 
random oops!
Actually my gfs is happy :) this could be a good starting point, due to 
different messages in the mailing list referencing the same problem.

Howewer some opss continues to present when i reboot the servers without 
umount the filesystem cleanly, But i suppose that this could be while iscsi 
is died before the system umounts local filesystem during shutdown procedure.

May  2 23:04:21 simlistener kernel: Unable to handle kernel NULL pointer 
dereference at virtual address 00000024
May  2 23:04:21 simlistener kernel:  printing eip:
May  2 23:04:21 simlistener kernel: dedb978a
May  2 23:04:21 simlistener kernel: *pde = 00000000
May  2 23:04:21 simlistener kernel: Oops: 0000 [#1]
May  2 23:04:21 simlistener kernel: PREEMPT
May  2 23:04:21 simlistener kernel: Modules linked in: gfs lock_dlm dlm 
lock_harness cman iscsi_tcp iscsi_if
May  2 23:04:21 simlistener kernel: CPU:    0
May  2 23:04:21 simlistener kernel: EIP:    0060:[<dedb978a>]    Not tainted 
VLI
May  2 23:04:21 simlistener kernel: EFLAGS: 00010212   (2.6.11.7)
May  2 23:04:21 simlistener kernel: EIP is at gfs_ail_start_trans+0x4a/0x1f0 
[gfs]
May  2 23:04:21 simlistener kernel: eax: 00000000   ebx: da609ec0   ecx: 
da609e80   edx: ded5e420
May  2 23:04:21 simlistener kernel: esi: dacd66d0   edi: da609ebc   ebp: 
da609000   esp: da609e48
May  2 23:04:21 simlistener kernel: ds: 007b   es: 007b   ss: 0068
May  2 23:04:21 simlistener kernel: Process umount (pid: 3690, 
threadinfo=da609000 task=dd5a1a80)
May  2 23:04:21 simlistener kernel: Stack: da609ec0 da609e60 00000000 da609000 
da609ec0 00000000 00000000 da609e60
May  2 23:04:21 simlistener kernel:        ded5c000 ded705c0 da609e60 dedd19e5 
ded5c000 da609e60 00000000 ded705ac
May  2 23:04:21 simlistener kernel:        ded5c000 da609000 da609ec0 da1fd100 
dedbb041 ded5c000 00000400 ded5c000
May  2 23:04:21 simlistener kernel: Call Trace:
May  2 23:04:21 simlistener kernel:  [<dedd19e5>] gfs_ail_start+0x75/0xc0 
[gfs]
May  2 23:04:21 simlistener kernel:  [<dedbb041>] gfs_sync_meta+0x31/0x60 
[gfs]
May  2 23:04:21 simlistener kernel:  [<dedeb6c3>] gfs_make_fs_ro+0x53/0xb0 
[gfs]
May  2 23:04:21 simlistener kernel:  [<dede12bd>] gfs_put_super+0x2bd/0x300 
[gfs]
May  2 23:04:21 simlistener kernel:  [<c015bad7>] 
generic_shutdown_super+0x127/0x140
May  2 23:04:21 simlistener kernel:  [<dedde4a2>] gfs_kill_sb+0x32/0x6e [gfs]
May  2 23:04:21 simlistener kernel:  [<c015b88e>] deactivate_super+0x6e/0xa0
May  2 23:04:21 simlistener kernel:  [<c017313f>] sys_umount+0x3f/0xa0
May  2 23:04:21 simlistener kernel:  [<c014882d>] do_munmap+0x13d/0x180
May  2 23:04:21 simlistener kernel:  [<c01488c0>] sys_munmap+0x50/0x80
May  2 23:04:21 simlistener kernel:  [<c01731b5>] sys_oldumount+0x15/0x20
May  2 23:04:21 simlistener kernel:  [<c010273f>] syscall_call+0x7/0xb
May  2 23:04:21 simlistener kernel: Code: 00 31 c0 89 44 24 14 b8 01 00 00 00 
e8 50 99 35 e1 8b 5f 04 39 fb 8b 73 04 74 2b$
May  2 23:04:21 simlistener kernel:  <6>note: umount[3690] exited with 
preempt_count 1
May  2 23:04:21 simlistener kernel: scheduling while atomic: 
umount/0x10000001/3690
May  2 23:04:21 simlistener kernel:  [<c03a66f2>] schedule+0x522/0x530
May  2 23:04:21 simlistener kernel:  [<c0143c0e>] unmap_page_range+0x7e/0xa0

May  2 23:04:21 simlistener kernel:  [<c0143de0>] unmap_vmas+0x1b0/0x210
May  2 23:04:21 simlistener kernel:  [<c0148bec>] exit_mmap+0x7c/0x170
May  2 23:04:21 simlistener kernel:  [<c0114677>] mmput+0x37/0xb0
May  2 23:04:21 simlistener kernel:  [<c011938b>] do_exit+0x9b/0x3c0
May  2 23:04:21 simlistener kernel:  [<c010392b>] die+0x18b/0x190
May  2 23:04:21 simlistener kernel:  [<c0116e27>] printk+0x17/0x20
May  2 23:04:21 simlistener kernel:  [<c01113da>] do_page_fault+0x2da/0x5d5
May  2 23:04:21 simlistener kernel:  [<c03a7261>] __wait_on_bit+0x51/0x70
May  2 23:04:21 simlistener kernel:  [<c012c050>] wake_bit_function+0x0/0x60
May  2 23:04:21 simlistener kernel:  [<dedd2938>] log_free_buf+0x58/0x60 [gfs]
May  2 23:04:21 simlistener kernel:  [<c03a68b9>] 
wait_for_completion+0xc9/0xf0
May  2 23:04:21 simlistener kernel:  [<c0111100>] do_page_fault+0x0/0x5d5
May  2 23:04:21 simlistener kernel:  [<c0103177>] error_code+0x2b/0x30
May  2 23:04:21 simlistener kernel:  [<dedb978a>] 
gfs_ail_start_trans+0x4a/0x1f0 [gfs]
May  2 23:04:21 simlistener kernel:  [<dedd19e5>] gfs_ail_start+0x75/0xc0 
[gfs]
May  2 23:04:21 simlistener kernel:  [<dedbb041>] gfs_sync_meta+0x31/0x60 
[gfs]
May  2 23:04:21 simlistener kernel:  [<dedeb6c3>] gfs_make_fs_ro+0x53/0xb0 
[gfs]
May  2 23:04:21 simlistener kernel:  [<dede12bd>] gfs_put_super+0x2bd/0x300 
[gfs]
May  2 23:04:21 simlistener kernel:  [<c015bad7>] 
generic_shutdown_super+0x127/0x140
May  2 23:04:21 simlistener kernel:  [<dedde4a2>] gfs_kill_sb+0x32/0x6e [gfs]
May  2 23:04:21 simlistener kernel:  [<c015b88e>] deactivate_super+0x6e/0xa0
May  2 23:04:21 simlistener kernel:  [<c017313f>] sys_umount+0x3f/0xa0
May  2 23:04:21 simlistener kernel:  [<c014882d>] do_munmap+0x13d/0x180
May  2 23:04:21 simlistener kernel:  [<c01488c0>] sys_munmap+0x50/0x80
May  2 23:04:21 simlistener kernel:  [<c01731b5>] sys_oldumount+0x15/0x20
May  2 23:04:21 simlistener kernel:  [<c010273f>] syscall_call+0x7/0xb



Best Regards

-- 
Dott. Ranaldo Nicola
Sistemi di Elaborazione
C.S.I. (Centro di Servizi Informativi di Ateneo)
Sede di Monte Sant'Angelo
Via Cinthia n.4 80126 Napoli
Tel. 081/676638
Fax. 081/676628
Email: ranaldo unina it


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