[Lustre-discuss] ldiskfs kernel bug in ldiskfs_mb_use_best_found

Aaron Knister aaron.knister at gmail.com
Thu Jun 5 05:55:40 PDT 2008 

For my own curiosity's sake, is there a bugzilla id associated with  
it? I'm curious to know what the problem is/was.

On Jun 5, 2008, at 8:50 AM, Alex Zhuravlev wrote:

> we've been investigating one issue which can be a source of your  
> problem.
> fortunately we can reproduce that.
>
> thanks, Alex
>
> Aaron Knister wrote:
>> Unfortunately the monkeys maintaining this setup (I left the company
>> last week) have managed to destroy one of the 13 terabyte arrays...so
>> they've got bigger issues right now. Thanks for your help though.
>>
>> On Jun 5, 2008, at 3:18 AM, Alex Zhuravlev wrote:
>>
>>> hmm. could you provide me with ldiskfs.ok then?
>>>
>>> thanks, Alex
>>>
>>> Aaron Knister wrote:
>>>> I'm not sure how to obtain that. I'm running whatever was  
>>>> distributed
>>>> with 1.6.4.3 for rhel5-x86_64.
>>>>
>>>> On Jun 2, 2008, at 8:08 AM, Alex Zhuravlev wrote:
>>>>
>>>>> could you also send me your mballoc.c please?
>>>>>
>>>>> thanks, Alex
>>>>>
>>>>> Aaron Knister wrote:
>>>>>> Thanks so much for looking into this. Here's what I got from  
>>>>>> dmesg.
>>>>>> Interestingly enough every time it panics the CPU listed is  
>>>>>> #4...do
>>>>>> you think that points to a hardware problem? -
>>>>>> ----------- [cut here ] --------- [please bite here ] ---------
>>>>>> Kernel BUG at
>>>>>> ...build/BUILD/lustre-ldiskfs-3.0.4/ldiskfs/mballoc.c:1334
>>>>>> invalid opcode: 0000 [1] SMP
>>>>>> last sysfs file:
>>>>>> /devices/ 
>>>>>> pci0000:00/0000:00:02.0/0000:01:00.0/0000:02:02.0/0000:04:00.1/ 
>>>>>> irq
>>>>>>
>>>>>>
>>>>>> CPU 4
>>>>>> Modules linked in: obdfilter(U) fsfilt_ldiskfs(U) ost(U) mgc(U)
>>>>>> ldiskfs(U) crc16(U) lustre(U) lov(U) lquota(U) mdc(U) ko2iblnd(U)
>>>>>> ptlrpc(U) obdclass(
>>>>>> U) lnet(U) lvfs(U) libcfs(U) netconsole(U) autofs4(U) hidp(U)
>>>>>> rfcomm(U) l2cap(U) bluetooth(U) sunrpc(U) ip6t_REJECT(U)  
>>>>>> xt_tcpudp(U)
>>>>>> ip6table_filter(U
>>>>>> ) ip6_tables(U) x_tables(U) ipv6(U) ib_iser(U) libiscsi(U)
>>>>>> scsi_transport_iscsi(U) rdma_ucm(U) ib_ucm(U) ib_srp(U) ib_sdp(U)
>>>>>> rdma_cm(U) ib_cm(U) iw_c
>>>>>> m(U) ib_addr(U) ib_local_sa(U) ib_ipoib(U) ib_sa(U) ib_uverbs(U)
>>>>>> ib_umad(U) dm_multipath(U) video(U) sbs(U) backlight(U) i2c_ec(U)
>>>>>> button(U) battery(
>>>>>> U) asus_acpi(U) acpi_memhotplug(U) ac(U) parport_pc(U) lp(U)
>>>>>> parport(U) ib_mthca(U) ib_mad(U) i2c_i801(U) e1000(U) ide_cd(U)
>>>>>> ib_core(U) shpchp(U) i2c
>>>>>> _core(U) cdrom(U) sg(U) pcspkr(U) dm_snapshot(U) dm_zero(U)
>>>>>> dm_mirror(U) dm_mod(U) ata_piix(U) ahci(U) megaraid_sas(U)
>>>>>> sata_sil(U) libata(U) sd_mod(U
>>>>>> ) scsi_mod(U) ext3(U) jbd(U) ehci_hcd(U) ohci_hcd(U) uhci_hcd(U)
>>>>>> Pid: 5717, comm: ll_ost_io_11 Tainted: GF
>>>>>> 2.6.18-53.1.13.el5_lustre.1.6.4.3smp #1
>>>>>> RIP: 0010:[<ffffffff8885a01f>]  [<ffffffff8885a01f>]
>>>>>> :ldiskfs:ldiskfs_mb_use_best_found+0xef/0x520
>>>>>> RSP: 0018:ffff81040e4dd320  EFLAGS: 00010246
>>>>>> RAX: 0000000000000000 RBX: ffff81040e4dd3d0 RCX: 000000000000007f
>>>>>> RDX: ffff810406833000 RSI: ffff8103a8250000 RDI: 0000000000001000
>>>>>> RBP: 0000000000000800 R08: 0000000000000020 R09: 0000000000000010
>>>>>> R10: ffff81037d136ff8 R11: 0000000000008000 R12: ffff81040e4dd470
>>>>>> R13: 0000000000010000 R14: 0000000000000020 R15: 0000000000000800
>>>>>> FS:  00002aaaaaac0220(0000) GS:ffff81042fc20b40(0000)
>>>>>> knlGS:0000000000000000
>>>>>> CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>>>>>> CR2: 00002aaaae2ad0a0 CR3: 000000041c6d1000 CR4: 00000000000006e0
>>>>>> Process ll_ost_io_11 (pid: 5717, threadinfo ffff81040e4dc000,  
>>>>>> task
>>>>>> ffff81041228a040)
>>>>>> Stack:  ffff81040e4dd4c0 ffff81040e4dd470 000000000000000b
>>>>>> 0000000000010000
>>>>>> 0000000000010000 0000000000000020 ffff81040e4dd4c0  
>>>>>> ffffffff8885cd4e
>>>>>> ffff81038c2b0a38 0000000000000010 ffff81040e4dd4a0  
>>>>>> 0000000000000000
>>>>>> Call Trace:
>>>>>> [<ffffffff8885cd4e>] :ldiskfs:ldiskfs_mb_regular_allocator 
>>>>>> +0x66e/0xd50
>>>>>> [<ffffffff888443c2>] :ldiskfs:ldiskfs_mark_inode_dirty 
>>>>>> +0x132/0x160
>>>>>> [<ffffffff88859664>]
>>>>>> :ldiskfs:ldiskfs_mb_initialize_context+0x144/0x160
>>>>>> [<ffffffff8885e1e6>] :ldiskfs:ldiskfs_mb_new_blocks+0x166/0x280
>>>>>> [<ffffffff888bf091>]
>>>>>> :fsfilt_ldiskfs:ldiskfs_ext_new_extent_cb+0x301/0x640
>>>>>> [<ffffffff8000a63f>] get_page_from_freelist+0x223/0x3cf
>>>>>> [<ffffffff882390b0>] :ib_mthca:mthca_arbel_post_send+0x5a2/0x5b4
>>>>>> [<ffffffff88856d27>] :ldiskfs:ldiskfs_ext_walk_space+0x1b7/0x250
>>>>>> [<ffffffff888bed90>]
>>>>>> :fsfilt_ldiskfs:ldiskfs_ext_new_extent_cb+0x0/0x640
>>>>>> [<ffffffff80054ccc>] mwait_idle+0x0/0x4a
>>>>>> [<ffffffff888ba9ae>] :fsfilt_ldiskfs:fsfilt_map_nblocks+0xfe/ 
>>>>>> 0x150
>>>>>> [<ffffffff888eee08>] :obdfilter:filter_direct_io+0x478/0xce0
>>>>>> [<ffffffff888f14de>] :obdfilter:filter_commitrw_write+0x184e/ 
>>>>>> 0x2570
>>>>>> [<ffffffff8005a2ea>] cache_alloc_refill+0x106/0x186
>>>>>> [<ffffffff8003ce86>] lock_timer_base+0x1b/0x3c
>>>>>> [<ffffffff8889eb46>] :ost:ost_brw_write+0x21b6/0x28c0
>>>>>> [<ffffffff80088431>] default_wake_function+0x0/0xe
>>>>>> [<ffffffff888a283e>] :ost:ost_handle+0x2a8e/0x58d8
>>>>>> [<ffffffff88603c82>] :obdclass:class_handle2object+0xd2/0x160
>>>>>> [<ffffffff8869f230>] :ptlrpc:lustre_swab_ptlrpc_body+0x0/0x90
>>>>>> [<ffffffff8869cde5>] :ptlrpc:lustre_swab_buf+0xc5/0xf0
>>>>>> [<ffffffff886a4a3b>] :ptlrpc:ptlrpc_server_handle_request+0xb0b/ 
>>>>>> 0x1270
>>>>>> [<ffffffff80060f29>] thread_return+0x0/0xeb
>>>>>> [<ffffffff8006b6c9>] do_gettimeofday+0x50/0x92
>>>>>> [<ffffffff8855d056>] :libcfs:lcw_update_time+0x16/0x100
>>>>>> [<ffffffff8003ce86>] lock_timer_base+0x1b/0x3c
>>>>>> [<ffffffff886a747c>] :ptlrpc:ptlrpc_main+0x7dc/0x950
>>>>>> [<ffffffff80088431>] default_wake_function+0x0/0xe
>>>>>> [<ffffffff8005bfb1>] child_rip+0xa/0x11
>>>>>> [<ffffffff886a6ca0>] :ptlrpc:ptlrpc_main+0x0/0x950
>>>>>> [<ffffffff8005bfa7>] child_rip+0x0/0x11
>>>>>> Code: 0f 0b 68 50 5c 86 88 c2 36 05 0f 1f 80 00 00 00 00 48 8b 43
>>>>>> RIP  [<ffffffff8885a01f>]
>>>>>> :ldiskfs:ldiskfs_mb_use_best_found+0xef/0x520
>>>>>> RSP <ffff81040e4dd320>
>>>>>> <0>Kernel panic - not syncing: Fatal exception
>>>>>> On Jun 2, 2008, at 3:40 AM, Alex Zhuravlev wrote:
>>>>>>> what about dmesg output? it's unlikely lustre debug can help  
>>>>>>> here as
>>>>>>> the problem
>>>>>>> seem to be very internal to ldiskfs (mballoc piece of it)
>>>>>>>
>>>>>>> thanks, Alex
>>>>>>>
>>>>>>> Aaron Knister wrote:
>>>>>>>> I bumped up debugging, and here's  (below) the last bit of  
>>>>>>>> debugging
>>>>>>>> info from lustre that I have on the oss before it went belly  
>>>>>>>> up. My
>>>>>>>> system is totally inoperable. Does anybody have any ideas?
>>>>>>>>
>>>>>>>> 00010000:00001000:4:1212157576.884909:0:6378:0: 
>>>>>>>> (ldlm_resource.c:865:ldlm_resource_add_lock())
>>>>>>>>
>>>>>>>>
>>>>>>>> About to add this lock:
>>>>>>>> 00010000:00001000:4:1212157576.884910:0:6378:0:(ldlm_lock.c: 
>>>>>>>> 1718:ldlm_lock_dump())
>>>>>>>>
>>>>>>>>
>>>>>>>> -- Lock dump: ffff81036e61f1c0/0x1fb135e1e3fd2cc6 (rc: 3)  
>>>>>>>> (pos: 
>>>>>>>> 0)(pid:6378)
>>>>>>>> 00010000:00001000:4:1212157576.884913:0:6378:0:(ldlm_lock.c: 
>>>>>>>> 1726:ldlm_lock_dump())
>>>>>>>>
>>>>>>>>
>>>>>>>> Node: local
>>>>>>>> 00010000:00001000:4:1212157576.884914:0:6378:0:(ldlm_lock.c: 
>>>>>>>> 1735:ldlm_lock_dump())
>>>>>>>>
>>>>>>>>
>>>>>>>> Resource: ffff8103849211c0 (3129942/0)
>>>>>>>> 00010000:00001000:4:1212157576.884915:0:6378:0:(ldlm_lock.c: 
>>>>>>>> 1740:ldlm_lock_dump())
>>>>>>>>
>>>>>>>>
>>>>>>>> Req mode: PW, grant mode: PW, rc: 3, read: 0, write: 1 flags:
>>>>>>>> 0x80004000
>>>>>>>> 00010000:00001000:4:1212157576.884917:0:6378:0:(ldlm_lock.c: 
>>>>>>>> 1746:ldlm_lock_dump())
>>>>>>>>
>>>>>>>>
>>>>>>>> Extent: 0 -> 18446744073709551615 (req 0-18446744073709551615)
>>>>>>>> 00010000:00000040:4:1212157576.884920:0:6378:0:(ldlm_lock.c: 
>>>>>>>> 615:ldlm_lock_decref_internal())
>>>>>>>>
>>>>>>>>
>>>>>>>> forcing cancel of local lock
>>>>>>>> 00010000:00000010:4:1212157576.884922:0:6378:0:(ldlm_lockd.c: 
>>>>>>>> 1357:ldlm_bl_to_thread())
>>>>>>>>
>>>>>>>>
>>>>>>>> kmalloced 'blwi': 120 at ffff81040e90a340 (tot 49135175)
>>>>>>>> 00002000:00000040:4:1212157576.884925:0:6378:0: 
>>>>>>>> (lustre_fsfilt.h:194:fsfilt_start_log())
>>>>>>>>
>>>>>>>>
>>>>>>>> started handle ffff8103766dfc78 (0000000000000000)
>>>>>>>> 00002000:00000040:4:1212157576.884930:0:6378:0: 
>>>>>>>> (lustre_fsfilt.h:270:fsfilt_commit())
>>>>>>>>
>>>>>>>>
>>>>>>>> committing handle ffff8103766dfc78
>>>>>>>> 00002000:00000040:4:1212157576.884931:0:6378:0: 
>>>>>>>> (lustre_fsfilt.h:194:fsfilt_start_log())
>>>>>>>>
>>>>>>>>
>>>>>>>> started handle ffff8103766dfc78 (0000000000000000)
>>>>>>>> 00000020:00000040:4:1212157576.884957:0:5557:0: 
>>>>>>>> (lustre_handles.c:121:class_handle_unhash_nolock())
>>>>>>>>
>>>>>>>>
>>>>>>>> removing object ffff81036e61f1c0 with handle 0x1fb135e1e3fd2cc6
>>>>>>>> from hash
>>>>>>>> 00000100:00000010:4:1212157576.884960:0:5557:0:(client.c: 
>>>>>>>> 394:ptlrpc_prep_set())
>>>>>>>>
>>>>>>>>
>>>>>>>> kmalloced 'set': 104 at ffff8104012d38c0 (tot 49135279)
>>>>>>>> 00000100:00000010:4:1212157576.884962:0:5557:0:(client.c: 
>>>>>>>> 457:ptlrpc_set_destroy())
>>>>>>>>
>>>>>>>>
>>>>>>>> kfreed 'set': 104 at ffff8104012d38c0 (tot 49135175).
>>>>>>>> 00010000:00000040:4:1212157576.884964:0:5557:0: 
>>>>>>>> (ldlm_resource.c:818:ldlm_resource_putref())
>>>>>>>>
>>>>>>>>
>>>>>>>> putref res: ffff8103849211c0 count: 0
>>>>>>>> 00010000:00000010:4:1212157576.884969:0:5557:0: 
>>>>>>>> (ldlm_resource.c:828:ldlm_resource_putref())
>>>>>>>>
>>>>>>>>
>>>>>>>> kfreed 'res->lr_lvb_data': 40 at ffff810379ded880 (tot  
>>>>>>>> 49135135).
>>>>>>>> 00010000:00000010:4:1212157576.885000:0:5557:0: 
>>>>>>>> (ldlm_resource.c:829:ldlm_resource_putref())
>>>>>>>>
>>>>>>>>
>>>>>>>> slab-freed 'res': 224 at ffff8103849211c0 (tot 49135135).
>>>>>>>> 00010000:00000010:4:1212157576.885002:0:5557:0:(ldlm_lockd.c: 
>>>>>>>> 1657:ldlm_bl_thread_main())
>>>>>>>>
>>>>>>>>
>>>>>>>> kfreed 'blwi': 120 at ffff81040e90a340 (tot 49134791).
>>>>>>>> 00002000:00000040:4:1212157576.885623:0:6378:0: 
>>>>>>>> (lustre_fsfilt.h:270:fsfilt_commit())
>>>>>>>>
>>>>>>>>
>>>>>>>> committing handle ffff8103766dfc78
>>>>>>>> 00002000:00000002:4:1212157576.885625:0:6378:0:(filter.c: 
>>>>>>>> 148:f_dput())
>>>>>>>>
>>>>>>>> putting 3129942: ffff8103599cea98, count = 0
>>>>>>>> 00002000:00080000:4:1212157576.885627:0:6378:0:(filter.c: 
>>>>>>>> 2689:filter_destroy_precreated())
>>>>>>>>
>>>>>>>>
>>>>>>>> crew4-OST0001: after destroy: set last_objids[0] = 3129941
>>>>>>>> 00002000:00000002:4:1212157576.885630:0:6378:0:(filter.c: 
>>>>>>>> 607:filter_update_last_objid())
>>>>>>>>
>>>>>>>>
>>>>>>>> crew4-OST0001: server last_objid for group 0: 3129941
>>>>>>>> 00002000:00000010:4:1212157576.912615:0:6485:0:(fsfilt- 
>>>>>>>> ldiskfs.c:747:fsfilt_ldiskfs_cb_func())
>>>>>>>>
>>>>>>>>
>>>>>>>> slab-freed 'fcb': 56 at ffff810371404920 (tot 49134335).
>>>>>>>> 00010000:00000040:4:1212157576.912669:0:6378:0:(ldlm_lib.c: 
>>>>>>>> 1556:target_committed_to_req())
>>>>>>>>
>>>>>>>>
>>>>>>>> last_committed 17896268, xid 3841
>>>>>>>> 00000100:00000040:4:1212157576.912674:0:6378:0:(connection.c: 
>>>>>>>> 191:ptlrpc_connection_addref())
>>>>>>>>
>>>>>>>>
>>>>>>>> connection=ffff8103fbe9e2c0 refcount 10 to 172.18.0.10
>>>>>>>> <http://172.18.0.10>@o2ib
>>>>>>>> 00000100:00000040:4:1212157576.912678:0:6378:0:(niobuf.c: 
>>>>>>>> 46:ptl_send_buf())
>>>>>>>>
>>>>>>>>
>>>>>>>> conn=ffff8103fbe9e2c0 id 12345-172.18.0.10 at o2ib
>>>>>>>> 00000400:00000010:4:1212157576.912680:0:6378:0:(lib-lnet.h: 
>>>>>>>> 247:lnet_md_alloc())
>>>>>>>>
>>>>>>>>
>>>>>>>> kmalloced 'md': 136 at ffff81040cb6cb80 (tot 9568949).
>>>>>>>> 00000400:00000010:4:1212157576.912683:0:6378:0:(lib-lnet.h: 
>>>>>>>> 295:lnet_msg_alloc())
>>>>>>>>
>>>>>>>>
>>>>>>>> kmalloced 'msg': 336 at ffff8104285e1e00 (tot 9569285).
>>>>>>>> 00000100:00000040:4:1212157576.912693:0:6378:0:(connection.c: 
>>>>>>>> 150:ptlrpc_put_connection())
>>>>>>>>
>>>>>>>>
>>>>>>>> connection=ffff8103fbe9e2c0 refcount 9 to 172.18.0.10
>>>>>>>> <http://172.18.0.10>@o2ib
>>>>>>>> 00000100:00000040:4:1212157576.912695:0:6378:0:(service.c: 
>>>>>>>> 648:ptlrpc_server_handle_request())
>>>>>>>>
>>>>>>>>
>>>>>>>> RPC PUTting export ffff8103848e9000 : new rpc_count 0
>>>>>>>> 00000100:00000040:4:1212157576.912697:0:6378:0:(service.c: 
>>>>>>>> 648:ptlrpc_server_handle_request())
>>>>>>>>
>>>>>>>>
>>>>>>>> PUTting export ffff8103848e9000 : new refcount 4
>>>>>>>> 00000100:00000040:4:1212157576.912699:0:6378:0:(service.c: 
>>>>>>>> 652:ptlrpc_server_handle_request())
>>>>>>>>
>>>>>>>>
>>>>>>>> PUTting export ffff8103848e9000 : new refcount 3
>>>>>>>> 00000400:00000010:4:1212157576.912741:0:5351:0:(lib-lnet.h: 
>>>>>>>> 269:lnet_md_free())
>>>>>>>>
>>>>>>>>
>>>>>>>> kfreed 'md': 136 at ffff81040cb6cb80 (tot 9569149).
>>>>>>>> 00000400:00000010:4:1212157576.912744:0:5351:0:(lib-lnet.h: 
>>>>>>>> 312:lnet_msg_free())
>>>>>>>>
>>>>>>>>
>>>>>>>> kfreed 'msg': 336 at ffff8104285e1e00 (tot 9568813).
>>>>>>>>
>>>>>>>>
>>>>>>>> On Wed, May 28, 2008 at 8:03 PM, Aaron Knister
>>>>>>>> <aaron.knister at gmail.com
>>>>>>>> <mailto:aaron.knister at gmail.com>> wrote:
>>>>>>>>
>>>>>>>> Thank you very much for looking into this. I've attached my
>>>>>>>> dmesg to
>>>>>>>> the bug. i looked at line number 1334 which the panic seems to
>>>>>>>> reference. i can't figure out what its doing though
>>>>>>>>
>>>>>>>> On Wed, May 28, 2008 at 4:54 PM, Alex Zhuravlev
>>>>>>>> <Alex.Zhuravlev at sun.com <mailto:Alex.Zhuravlev at sun.com>> wrote:
>>>>>>>>
>>>>>>>>     Aaron Knister wrote:
>>>>>>>>
>>>>>>>>         I'm seeing this bug (14465) under heavy load on my
>>>>>>>> OSSes. If
>>>>>>>>         I reboot the MDS it appears to help...any ideas?  
>>>>>>>> What's the
>>>>>>>>         status on this bug?
>>>>>>>>
>>>>>>>>
>>>>>>>>     could you attach your dmesg to the bug? as for the status  
>>>>>>>> - I'm
>>>>>>>>     still not
>>>>>>>>     able to reproduce this, neither I found possible cause,  
>>>>>>>> sorry.
>>>>>>>>
>>>>>>>>     thanks, Alex
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Lustre-discuss mailing list
>>>>>>> Lustre-discuss at lists.lustre.org
>>>>>>> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>>>>>
>>>>
>>>
>>> _______________________________________________
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>>> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>>
>
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