Re: kernel panic with 2.6.37-rc1 +pnfs

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I already have merged with corresponding commit and in the process of
building.

Thanks.

On 11/10/2010 02:03 PM, Boaz Harrosh wrote:
> On 11/10/2010 12:33 PM, Benny Halevy wrote:
>> On 2010-11-09 16:41, Tigran Mkrtchyan wrote:
>>>
>>>
>>> pnfs-all-2.6.37-rc1-2010-11-03 from Banny's tree (git 
>>> 6a1df873544d146fcdc493034b170879985909e8)
>>> I am not sure that this is NFS code issue, but anyway. With NFS IO  
>>> minutes machine becomes unresponcive.
>>> This prevents us to update our cluster with latest code base.
>>>
>>> Tigran.
>>>
>>> [  293.145013] general protection fault: 0000 [#1] SMP
>>> [  293.145017] last sysfs file: 
>>> /sys/devices/pci0000:00/0000:00:0d.0/resource
>>> [  293.145019] CPU 0
>>> [  293.145021] Modules linked in: ipv6 af_packet binfmt_misc dm_mirror 
>>> dm_multipath scsi_dh video output thermal sbs sbshc pci_slot fan 
>>> container battery lp sg option usb_wwan ac usbserial button thermal_sys 
>>> parport_pc serio_raw parport tpm_tis tpm tpm_bios e1000 i2c_piix4 
>>> pata_mpiix dm_region_hash dm_log dm_mod [last unloaded: mperf]
>>> [  293.145042]
>>> [  293.145045] Pid: 1953, comm: sadc Not tainted 2.6.37-rc1.pnfs.1 #1 
>>> /VirtualBox
>>> [  293.145047] RIP: 0010:[<ffffffff811a2cfa>]  [<ffffffff811a2cfa>] 
>>> strnlen+0xa/0x30
>>> [  293.145054] RSP: 0018:ffff88002d4cfcd0  EFLAGS: 00010297
>>> [  293.145056] RAX: ffffffff814d5cfa RBX: ffffffffffffffff RCX: 
>>> ffffffffffffffff
>>> [  293.145058] RDX: fffffffffffffffe RSI: ffffffffffffffff RDI: 
>>> 9a81ffffffff814d
>>> [  293.145060] RBP: 9a81ffffffff814d R08: 0000000000000000 R09: 
>>> ffffffff8165c4a8
>>> [  293.145062] R10: 00007f73dd7243fb R11: 0000000000000246 R12: 
>>> 0000000000000000
>>> [  293.145064] R13: ffff88002d47d000 R14: ffff88002d47c000 R15: 
>>> 00000000ffffffff
>>> [  293.145071] FS:  00007f73dd70b6e0(0000) GS:ffff88003fc00000(0000) 
>>> knlGS:0000000000000000
>>> [  293.145074] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>> [  293.145076] CR2: 00007f73dd724000 CR3: 000000002d4a6000 CR4: 
>>> 00000000000006f0
>>> [  293.145083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
>>> 0000000000000000
>>> [  293.145085] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 
>>> 0000000000000400
>>> [  293.145088] Process sadc (pid: 1953, threadinfo ffff88002d4ce000, 
>>> task ffff88003d5a51f0)
>>> [  293.145091] Stack:
>>> [  293.145093]  ffffffff811a46bc ffff88002d41e840 ffffffff814d98f9 
>>> 0000000000000002
>>> [  293.145096]  ffff88002d47c000 ffff88002d4cfd78 ffff88002d47d000 
>>> ffffffff814d98fb
>>> [  293.145100]  ffffffff811a5488 0000000000001000 ffff88002d47c000 
>>> ffffffffff0a0004
>>> [  293.145104] Call Trace:
>>> [  293.145107]  [<ffffffff811a46bc>] ? string+0x4c/0x100
>>> [  293.145110]  [<ffffffff811a5488>] ? vsnprintf+0x218/0x560
>>> [  293.145114]  [<ffffffff810efac7>] ? seq_printf+0x67/0xa0
>>> [  293.145118]  [<ffffffff81043d32>] ? get_online_cpus+0x22/0x50
>>> [  293.145121]  [<ffffffff81043d82>] ? put_online_cpus+0x22/0x70
>>> [  293.145125]  [<ffffffff810ac71f>] ? vmstat_start+0x7f/0xa0
>>> [  293.145128]  [<ffffffff810abeb3>] ? vmstat_show+0x23/0x30
>>> [  293.145130]  [<ffffffff810eff2f>] ? seq_read+0xaf/0x3a0
>>> [  293.145134]  [<ffffffff8111e223>] ? proc_reg_read+0x73/0xb0
>>> [  293.145138]  [<ffffffff810d43ed>] ? vfs_read+0xcd/0x170
>>> [  293.145141]  [<ffffffff810d4633>] ? sys_read+0x53/0x90
>>> [  293.145144]  [<ffffffff81002c6b>] ? system_call_fastpath+0x16/0x1b
>>> [  293.145146] Code: 01 e8 38 10 74 0b 48 83 e8 01 48 39 c5 76 f3 31 c0 
>>> 5b 5d c3 66 0f 1f 44 00 00 0f 1f 80 00 00 00 00 48 8d 56 ff 48 83 fa ff 
>>> 74 21 <80> 3f 00 74 1c 48 89 f8 eb 05 80 38 00 74 0e 48 83 ea 01 48 83
>>> [  293.145171] RIP  [<ffffffff811a2cfa>] strnlen+0xa/0x30
>>> [  293.145174]  RSP <ffff88002d4cfcd0>
>>> [  293.145177] ---[ end trace 63b42edd98a8dea9 ]---
>>>
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>>
>> I guess that ff8b16d vmstat: fix offset calculation on void*
>> could fix this problem.  It's currently in Linus's master branch
>> and he hasn't released 2.6.37-rc2 yet.
>> Can you please try to reproduce the problem you saw with this patch?
>>
> 
> You can just merge linus master ontop of the pnfs-all-latest
> []$ git checkout pnfs-all-latest
> []$ git remote add -f linus git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
> []$ git merge linus/master
> (Hopefully no merge conflicts with nfs bug fixes)
> 
> Cheers
> 
>> Benny
>> --
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> 
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