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Date:   Fri, 14 Oct 2016 06:25:08 +0530
From:   Siva Reddy Kallam <siva.kallam@...adcom.com>
To:     Meelis Roos <mroos@...ux.ee>
Cc:     Linux Netdev List <netdev@...r.kernel.org>,
        sparclinux@...r.kernel.org,
        Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: tg3 BUG: spinlock lockup suspected

On Mon, Oct 10, 2016 at 5:21 PM, Siva Reddy Kallam
<siva.kallam@...adcom.com> wrote:
> On Sun, Oct 9, 2016 at 12:35 AM, Meelis Roos <mroos@...ux.ee> wrote:
>>> > That did not go well - bisect found the following commit but that does
>>> > not seem to be related at all. So probably the reproducibility is not
>>> > 100% but more random.
>>>
>>> Now I reproduced the bug even with 4.7-rc1 so it is older than 4.7. Will
>>> test further.
>>
>> It gets stranger and stranger - my old 4.7 image worked fine, freshly
>> compiled 4.7 exhibits the same problem.
>>
>> Toolchain has not changed, that I know for sure.
>>
>> What may have changed is kernel .config. My old conf was with whatever I
>> had during 4.7. Then I upgraded to 4.8-rc3 and then 4.8 and selected
>> values for "make oldconfig" new entries. Then went back to 4.7-rc1 and
>> then to 4.7 with this config, answering quiestion about new options when
>> any appeared. Diff is not available since I do not have the old configs
>> archived.
>>
>> Any ideas where to continue from here?
> Probably, You can do fresh system installation if possible.
> Any way, I will try to reproduce with 4.7 and 4.8 kernel versions.
> Will let you know my response in 1-2 days.
We are unable to reproduce with Intel system. we tried with both 4.7
and 4.8 kernel versions.
We are trying to get one SPARC system. We will let you know once we
are done with reproducing with SPARC system.
>>
>>>
>>> >
>>> >
>>> > 4c5773f9f5462dcb372857813918bbfe8c0cdcdd is the first bad commit
>>> > commit 4c5773f9f5462dcb372857813918bbfe8c0cdcdd
>>> > Author: Krzysztof Kozlowski <krzk@...nel.org>
>>> > Date:   Sat May 28 11:54:12 2016 +0200
>>> >
>>> >     dt-bindings: clock: Add license and reformat Exynos5410 clock IDs
>>> >
>>> >     Add license and copyrights (file introduced in 2014) to header with
>>> >     Exynos5410 clock IDs. Additionally reformat it to improve readability.
>>> >
>>> >     Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
>>> >     Acked-by: Stephen Boyd <sboyd@...eaurora.org>
>>> >     Reviewed-by: Javier Martinez Canillas <javier@....samsung.com>
>>> >     Signed-off-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
>>> >
>>> > :040000 040000 acbd432e11366a8eb8775942bc7b8caa476226e2 08e3a3f98c3d4fa2a93123c3f21b2847c06b4665 M      include
>>> >
>>> >
>>> > The whiole bisect log seems to dig around in unrelated places so at best
>>> > it just narrows the window by adding some known-bad data points.
>>> >
>>> > git bisect start
>>> > # good: [523d939ef98fd712632d93a5a2b588e477a7565e] Linux 4.7
>>> > git bisect good 523d939ef98fd712632d93a5a2b588e477a7565e
>>> > # bad: [ef0e1ea8856bed6ff8394d3dfe77f2cab487ecea] Merge tag 'arc-4.8-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
>>> > git bisect bad ef0e1ea8856bed6ff8394d3dfe77f2cab487ecea
>>> > # good: [e0b3f595d13b3e9ce9cdf53935e7f304c04b5b2b] affs ->d_compare(): don't bother with ->d_inode
>>> > git bisect good e0b3f595d13b3e9ce9cdf53935e7f304c04b5b2b
>>> > # bad: [77a87824ed676ca8ff8482e4157d3adb284fd381] clocksource/drivers/clps_711x: fixup for "ARM: clps711x:
>>> > git bisect bad 77a87824ed676ca8ff8482e4157d3adb284fd381
>>> > # bad: [27acbec338113a75b9d72aeb53149a3538031dda] Merge git://www.linux-watchdog.org/linux-watchdog
>>> > git bisect bad 27acbec338113a75b9d72aeb53149a3538031dda
>>> > # bad: [7f155c702677d057d03b192ce652311de5434697] Merge tag 'nfs-for-4.8-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
>>> > git bisect bad 7f155c702677d057d03b192ce652311de5434697
>>> > # good: [797cee982eef9195736afc5e7f3b8f613c41d19a] Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit
>>> > git bisect good 797cee982eef9195736afc5e7f3b8f613c41d19a
>>> > # bad: [1056c9bd2702ea1bb79abf9bd1e78c578589d247] Merge tag 'clk-for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
>>> > git bisect bad 1056c9bd2702ea1bb79abf9bd1e78c578589d247
>>> > # bad: [1ff435d3571199a799ba6ccfe05544dcd21b9fb3] Merge branch 'clk-st-critical' into clk-next
>>> > git bisect bad 1ff435d3571199a799ba6ccfe05544dcd21b9fb3
>>> > # bad: [0e4504470667d355b53ca3c9802fdd2120c9f946] clk: samsung: exynos5433: Add CLK_IGNORE_UNUSED flag to PCIE device
>>> > git bisect bad 0e4504470667d355b53ca3c9802fdd2120c9f946
>>> > # bad: [880c81b3b6604a004d56b5975c8bed47276e8bf6] clk: samsung: exynos5440: Constify all clock initializers
>>> > git bisect bad 880c81b3b6604a004d56b5975c8bed47276e8bf6
>>> > # bad: [b3a96eed8e84780d300b79b58047ea277ba358b7] clk: samsung: exynos3250: Move platform driver and of_device_id to init section
>>> > git bisect bad b3a96eed8e84780d300b79b58047ea277ba358b7
>>> > # bad: [4528dd8ed477bf202bd33ee48d38d656672d37f8] dt-bindings: clock: Add watchdog and SSS clock IDs to Exynos5410
>>> > git bisect bad 4528dd8ed477bf202bd33ee48d38d656672d37f8
>>> > # bad: [5cd3535a27a7cf8fc4070b499d66e419e7e72b61] dt-bindings: clock: Add PWM and USB clock IDs to Exynos5410
>>> > git bisect bad 5cd3535a27a7cf8fc4070b499d66e419e7e72b61
>>> > # bad: [4c5773f9f5462dcb372857813918bbfe8c0cdcdd] dt-bindings: clock: Add license and reformat Exynos5410 clock IDs
>>> > git bisect bad 4c5773f9f5462dcb372857813918bbfe8c0cdcdd
>>> > # first bad commit: [4c5773f9f5462dcb372857813918bbfe8c0cdcdd] dt-bindings: clock: Add license and reformat Exynos5410 clock IDs
>>> >
>>> >
>>> > >
>>> > > [   74.123859] tg3.c:v3.137 (May 11, 2014)
>>> > > [   74.123880] PCI: Enabling device: (0000:00:02.0), cmd 2
>>> > > [   74.315794] tg3 0000:00:02.0 (unnamed net_device) (uninitialized): Cannot get nvram lock, tg3_nvram_init failed
>>> > > [   74.656152] tg3 0000:00:02.0 eth0: Tigon3 [partno(none) rev 2003] (PCI:66MHz:64-bit) MAC address 00:03:ba:0a:f3:85
>>> > > [   74.656160] tg3 0000:00:02.0 eth0: attached PHY is 5704 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[0])
>>> > > [   74.656167] tg3 0000:00:02.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
>>> > > [   74.656172] tg3 0000:00:02.0 eth0: dma_rwctrl[763f0000] dma_mask[32-bit]
>>> > > [   74.656322] PCI: Enabling device: (0000:00:02.1), cmd 2
>>> > > [   74.845325] tg3 0000:00:02.1 (unnamed net_device) (uninitialized): Cannot get nvram lock, tg3_nvram_init failed
>>> > > [   75.184539] tg3 0000:00:02.1 eth1: Tigon3 [partno(none) rev 2003] (PCI:66MHz:64-bit) MAC address 00:03:ba:0a:f3:86
>>> > > [   75.184546] tg3 0000:00:02.1 eth1: attached PHY is 5704 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[0])
>>> > > [   75.184551] tg3 0000:00:02.1 eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
>>> > > [   75.184557] tg3 0000:00:02.1 eth1: dma_rwctrl[763f0000] dma_mask[32-bit]
>>> > > [   75.184708] PCI: Enabling device: (0003:00:02.0), cmd 2
>>> > > [   75.375322] tg3 0003:00:02.0 (unnamed net_device) (uninitialized): Cannot get nvram lock, tg3_nvram_init failed
>>> > > [   75.714681] tg3 0003:00:02.0 eth2: Tigon3 [partno(none) rev 2003] (PCI:66MHz:64-bit) MAC address 00:03:ba:0a:f3:87
>>> > > [   75.714688] tg3 0003:00:02.0 eth2: attached PHY is 5704 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[0])
>>> > > [   75.714694] tg3 0003:00:02.0 eth2: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
>>> > > [   75.714699] tg3 0003:00:02.0 eth2: dma_rwctrl[763f0000] dma_mask[32-bit]
>>> > > [   75.714819] PCI: Enabling device: (0003:00:02.1), cmd 2
>>> > > [   75.905278] tg3 0003:00:02.1 (unnamed net_device) (uninitialized): Cannot get nvram lock, tg3_nvram_init failed
>>> > > [   76.244470] tg3 0003:00:02.1 eth3: Tigon3 [partno(none) rev 2003] (PCI:66MHz:64-bit) MAC address 00:03:ba:0a:f3:88
>>> > > [   76.244477] tg3 0003:00:02.1 eth3: attached PHY is 5704 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[0])
>>> > > [   76.244482] tg3 0003:00:02.1 eth3: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
>>> > > [   76.244488] tg3 0003:00:02.1 eth3: dma_rwctrl[763f0000] dma_mask[32-bit]
>>> > > [   83.643317] tg3 0000:00:02.0 eth0: No firmware running
>>> > > [...]
>>> > > [   83.716570] BUG: spinlock lockup suspected on CPU#0, dhclient/1014
>>> > > [   83.797819]  lock: 0xfff000123c8e4a08, .magic: dead4ead, .owner: ip/1001, .owner_cpu: 1
>>> > > [   83.903130] CPU: 0 PID: 1014 Comm: dhclient Not tainted 4.8.0 #4
>>> > > [   83.982129] Call Trace:
>>> > > [   84.014160]  [00000000004b7220] spin_dump+0x60/0xa0
>>> > > [   84.078203]  [00000000004b73a0] do_raw_spin_lock+0xa0/0x120
>>> > > [   84.106344] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
>>> > > [   84.107193] ip (1001) used greatest stack depth: 2168 bytes left
>>> > > [   84.306955]  [000000000092c0d0] _raw_spin_lock_bh+0x30/0x40
>>> > > [   84.380188]  [00000000100822cc] tg3_get_stats64+0xc/0x80 [tg3]
>>> > > [   84.456885]  [00000000007fac8c] dev_get_stats+0x2c/0xc0
>>> > > [   84.525506]  [000000000081a4e8] dev_seq_printf_stats+0x8/0xe0
>>> > > [   84.600986]  [000000000081a5e4] dev_seq_show+0x24/0x40
>>> > > [   84.668467]  [00000000005cb6c4] seq_read+0x2c4/0x440
>>> > > [   84.733656]  [000000000060b97c] proc_reg_read+0x3c/0x80
>>> > > [   84.802282]  [00000000005a219c] __vfs_read+0x1c/0x140
>>> > > [   84.868613]  [00000000005a2310] vfs_read+0x50/0x100
>>> > > [   84.932662]  [00000000005a265c] SyS_read+0x3c/0xa0
>>> > > [   84.995573]  [00000000004061d4] linux_sparc_syscall32+0x34/0x60
>>> > > [   85.073748] * CPU[  0]: TSTATE[00000044f0001a22] TPC[00000000f79a16b0] TNPC[00000000f79a16b4] TASK[dhclient:1014]
>>> > > [   85.208732]              TPC[f79a16b0] O7[f79405c8] I7[0] RPC[0]
>>> > > [   85.287633]   CPU[  1]: TSTATE[0000004480001605] TPC[00000000004b26f0] TNPC[00000000004d0b0c] TASK[swapper/1:0]
>>> > > [   85.420338]              TPC[trace_hardirqs_off+0x10/0x20] O7[rcu_idle_enter+0x64/0xa0] I7[cpu_startup_entry+0x1b0/0x240] RPC[rest_init+0x178/0x1a0]
>>> > > [   85.664600] tg3 0000:00:02.0 eth0: Link is up at 100 Mbps, full duplex
>>> > > [   85.750515] tg3 0000:00:02.0 eth0: Flow control is off for TX and off for RX
>>> > > [   85.843994] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
>>> > >
>>> > >
>>> >
>>> >
>>>
>>>
>>
>> --
>> Meelis Roos (mroos@...ux.ee)

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