Hi,

Some info may help here.

When oops occurs on secondary node, I found it log with "meta connection
shut down by peer".

<6>[ 7423.143569] block drbd0: peer( Primary -> Unknown ) conn( SyncTarget
-> TearDown ) pdsk( UpToDate -> DUnknown )
<3>[ 7423.191698] drbd drbd0: meta connection shut down by peer.

And disconnect successfully if log with "ack_receiver terminated".

<6>[ 7407.584922] block drbd0: peer( Primary -> Unknown ) conn( SyncTarget
-> TearDown ) pdsk( UpToDate -> DUnknown )
<6>[ 7407.585424] drbd drbd0: ack_receiver terminated


2017-08-10 15:37 GMT+08:00 li songmin <lisongm...@gmail.com>:

> After a more test, it seems only occur from 8.3 to 8.4, 8.4 to 8.4 work
> well.
>
> Could we sure this problem not affect with 8.4 to 8.4?
>
> And also see the crash in attachment
>
> 2017-08-09 22:21 GMT+08:00 li songmin <lisongm...@gmail.com>:
>
>>
>> Hi,
>>
>> when I upgrade drbd from 8.3.15 to 8.4.6-5, there is an oops cause by
>> NULL pointer Error.
>>
>> upgrade step as follow:
>>
>> 1.  primary node work with drbd 8.3.15 as normal
>> 2. stop drbd 8.3.15 on secondary node, and upgrade it to 8.4.6-5.
>> 3. start secondary node, now data begin sync from primary node.
>> 4. upgrade primary node with follow step
>>      1. stop business service on drbd
>>       2. disconnect drbd for umount quickly  <--  oops on secondary node
>> here?
>>       3.  umount filesystem
>>       4. primary -> secondary
>>       5. connect drbd and waiting sync complete.
>>       6. business service may start on secondary node now.
>>       7. stop drbd 8.3.15 on primary node, and upgrade it to 8.4.6-5.
>>
>> call stack:
>>
>> <6>[66071016.839607] block drbd0: peer( Primary -> Unknown )
>>  conn( Connected -> TearDown ) pdsk( UpToDate -> DUnknown )
>> <3>[66071016.840029] drbd drbd0: meta connection shut down by peer.
>> <6>[66071016.840037] drbd drbd0: ack_receiver terminated
>> <6>[66071016.840040] drbd drbd0: Terminating drbd_a_drbd0
>> <1>[66071017.154996] BUG: unable to handle kernel NULL point
>> er dereference at           (null)
>> <1>[66071017.155013] IP: [<ffffffff8107b4e7>] __queue_work+0x17/0x3f0
>> <4>[66071017.155030] PGD 0
>> <0>[66071017.155037] Oops: 0000 [#1] SMP
>> <4>[66071017.155048] CPU 0
>> <4>[66071017.155051] Modules linked in: softdog drbd(FN) crc
>> 32c libcrc32c ib_ipoib ib_cm mlx4_en mlx4_ib ib_sa ib_mad ib
>> _core mlx4_core mpt3sas mptctl mptbase lp parport_pc ppdev s
>> t parport ide_cd_mod ide_core joydev ipmi_devintf ipmi_si ip
>> mi_msghandler tcp_diag inet_diag nls_utf8 dm_snapshot af_pac
>> ket md5 binfmt_misc edd bonding cpufreq_conservative cpufreq
>> _userspace cpufreq_powersave acpi_cpufreq mperf microcode
>> fuse loop dm_mod cdc_ether igb usbnet shpchp tpm_tis dca
>> tpm ipv6 pci_hotplug sr_mod ipv6_lib tpm_bios ptp mii sg
>> pcspkr i2c_i801 rtc_cmos cdrom pps_core wmi button
>> ext3 jbd mbcache usbhid hid ttm drm_kms_helper drm i2c_
>> algo_bit sysimgblt sysfillrect i2c_core syscopyarea ehci_
>> hcd usbcore sd_mod usb_common crc_t10dif processor thermal_s
>> ys hwmon scsi_dh_alua scsi_dh_hp_sw scsi_dh_emc scsi_dh_rdac
>>  scsi_dh ahci libahci libata mpt2sas scsi_transport_sas
>> raid_class megaraid_sas scsi_mod [last unloaded: drbd]
>> <4>[66071017.155207] Supported: No, Unsupported modules are loaded
>> <4>[66071017.155214]
>> <4>[66071017.155221] Pid: 0, comm: swapper Tainted: GF   B
>>     N  3.0.76-0.11-default #1 IBM System x3650 M4 : -[7915OSC]-/00Y8494
>> <4>[66071017.155234] RIP: 0010:[<ffffffff8107b4e7>]  [<fffff
>> fff8107b4e7>] __queue_work+0x17/0x3f0
>> <4>[66071017.155246] RSP: 0018:ffff88047fc03cc0  EFLAGS: 00010086
>> <4>[66071017.155253] RAX: 0000000000000000 RBX: ffff88046503
>> 2c00 RCX: 0000000000000000
>> <4>[66071017.155261] RDX: ffff8804294fb3e0 RSI: 000000000000
>> 0000 RDI: 0000000000000000
>> <4>[66071017.155269] RBP: 0000000000000000 R08: 000000000000
>> 0000 R09: 00000004d9030553
>> <4>[66071017.155277] R10: 00000004d903059c R11: 000000000000
>> 0001 R12: ffff880465032800
>> <4>[66071017.155285] R13: ffff8804294fb3e0 R14: 000000000000
>> 0000 R15: 0000000000003800
>> <4>[66071017.155293] FS:  0000000000000000(0000) GS:ffff8804
>> 7fc00000(0000) knlGS:0000000000000000
>> <4>[66071017.155302] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>> <4>[66071017.155309] CR2: 0000000000000000 CR3: 0000000001a0
>> 9000 CR4: 00000000000407f0
>> <4>[66071017.155317] DR0: 0000000000000000 DR1: 000000000000
>> 0000 DR2: 0000000000000000
>> <4>[66071017.155325] DR3: 0000000000000000 DR6: 00000000ffff
>> 0ff0 DR7: 0000000000000400
>> <4>[66071017.155333] Process swapper (pid: 0, threadinfo fff
>> fffff81a00000, task ffffffff81a11020)
>> <0>[66071017.155341] Stack:
>> <4>[66071017.155346]  ffff88046557b000 ffff880438b41248 ffff
>> 880465bfe000 ffff880465032c00
>> <4>[66071017.155363]  ffff880465032870 ffff880465032800 ffff
>> 88076b08e000 ffff8804294fb3c0
>> <4>[66071017.155376]  0000000000003800 ffffffff8107b906 ffff
>> 8804654e8e10 ffffffff8107b95a
>> <0>[66071017.155389] Call Trace:
>> <4>[66071017.155408]  [<ffffffff8107b906>] queue_work_on+0x16/0x30
>> <4>[66071017.155419]  [<ffffffff8107b95a>] queue_work+0x1a/0x20
>> <4>[66071017.155440]  [<ffffffffa06aa8cd>] drbd_endio_write_
>> sec_final+0x25d/0x650 [drbd]
>> <4>[66071017.155488]  [<ffffffff8122404b>] blk_update_request+0x10b/0x440
>> <4>[66071017.155502]  [<ffffffff8122439f>] blk_update_bidi_r
>> equest+0x1f/0x90
>> <4>[66071017.155513]  [<ffffffff81225517>] blk_end_bidi_request+0x27/0x80
>> <4>[66071017.155538]  [<ffffffffa000a5ea>] scsi_end_request+
>> 0x3a/0xb0 [scsi_mod]
>> <4>[66071017.155572]  [<ffffffffa000a9dc>] scsi_io_completio
>> n+0x10c/0x5b0 [scsi_mod]
>> <4>[66071017.155598]  [<ffffffff8122b8b5>] blk_done_softirq+0x75/0x90
>> <4>[66071017.155611]  [<ffffffff81066eaf>] __do_softirq+0xef/0x220
>> <4>[66071017.155627]  [<ffffffff814657dc>] call_softirq+0x1c/0x30
>> <4>[66071017.155642]  [<ffffffff81004445>] do_softirq+0x65/0xa0
>> <4>[66071017.155654]  [<ffffffff81066ca5>] irq_exit+0xc5/0xe0
>> <4>[66071017.155667]  [<ffffffff81465433>] call_function_sin
>> gle_interrupt+0x13/0x20
>> <4>[66071017.155683]  [<ffffffff812ba85e>] intel_idle+0x9e/0x130
>> <4>[66071017.155697]  [<ffffffff813769eb>] cpuidle_idle_call+0x11b/0x280
>> <4>[66071017.155710]  [<ffffffff81002126>] cpu_idle+0x66/0xb0
>> <4>[66071017.155722]  [<ffffffff81beeeff>] start_kernel+0x376/0x447
>> <4>[66071017.155736]  [<ffffffff81bee3c9>] x86_64_start_kern
>> el+0x123/0x13d
>> <0>[66071017.155746] Code: 8f b5 00 7d d4 5b c3 66 66 66 66
>> 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 89 fe 41 55 49 89
>> d5 41 54 55 48 89 f5 53 48 83 ec 18 <8b> 16 f6 c2 40 0f 85 6
>> 4 02 00 00 f6 c2 02 0f 85 f5 01 00 00 41
>> <1>[66071017.155810] RIP  [<ffffffff8107b4e7>] __queue_work+0x17/0x3f0
>> <4>[66071017.155820]  RSP <ffff88047fc03cc0>
>> <0>[66071017.155826] CR2: 0000000000000000
>>
>>
>>
>>
>
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