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([2a01:e34:ed2f:f020:b99:1d57:8555:27fb]) by smtp.googlemail.com with ESMTPSA id y7sm12250966wrw.55.2021.11.14.14.21.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 14 Nov 2021 14:21:01 -0800 (PST) Subject: Re: DEAD callback error for CPU, WARNING: CPU: 3 PID: 1134 at kernel/cpu.c:1163 _cpu_down+0x20a/0x3a0 To: Josef Johansson , "Colin King (gmail)" , Peter Zijlstra , Lukasz Luba Cc: Thomas Gleixner , "linux-kernel@vger.kernel.org" References: <4ab6e843-b902-24d2-14fe-c28133e52ea0@gmail.com> <11a0b52c-235d-4dcb-afe3-b18a8bea5917@oderland.se> <941c9027-4476-b66b-736d-6cec3301ef75@oderland.se> From: Daniel Lezcano Message-ID: Date: Sun, 14 Nov 2021 23:20:59 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <941c9027-4476-b66b-736d-6cec3301ef75@oderland.se> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 14/11/2021 21:00, Josef Johansson wrote: > On 11/14/21 11:32, Josef Johansson wrote: >> On 11/8/21 23:25, Colin King (gmail) wrote: >>> On 08/11/2021 08:12, Peter Zijlstra wrote: >>>> On Sun, Nov 07, 2021 at 11:59:17AM +0000, Colin King (gmail) wrote: >>>>> On a SMP system in a VM, a deadlock callback error can be reproduced >>>>> with >>>>> 5.15, tested from head at commit >>>>> d4439a1189f93d0ac1eaf0197db8e6b3e197d5c7 I think it is fixed https://lkml.org/lkml/2021/11/8/44 >>>>> >>>>> Didn't see this issue on 5.13 >>>>> >>>>> How to reproduce: >>>>> >>>>> git clone https://github.com/ColinIanKing/stress-ng >>>>> cd stress-ng >>>>> make -j $(nproc) >>>>> sudo ./stress-ng --cpu-online 0 -t 15 --pathological >>>>> >>>>> Tested on a 8 thread virtual machine, 4MB of memory. >>>>> >>>>> [ 2239.378724] smpboot: CPU 6 is now offline >>>>> [ 2239.379443] smpboot: Booting Node 0 Processor 6 APIC 0x6 >>>>> [ 2239.380169] kvm-clock: cpu 6, msr 79201181, secondary cpu clock >>>>> [ 2239.401652] ------------[ cut here ]------------ >>>>> [ 2239.401658] DEAD callback error for CPU6 >>>>> [ 2239.401721] WARNING: CPU: 3 PID: 1134 at kernel/cpu.c:1163 >>>>> _cpu_down+0x20a/0x3a0 >>>> Can you do the same with whatever magic is required to get the >>>> pr_debug() output from cpuhp_down_callbacks() included? >>>> >> I don't get this sentence at all. Is there some patch I should add? >>> reproducer is actually very easy: >>> >>> # echo 0 > /sys/devices/system/cpu/cpu7/online >>> >>> >>> [   75.258042] smpboot: CPU 7 is now offline >>> [   75.258093] CPU DOWN failed (-22) CPU 7 state padata:dead (39) >>> [   75.258193] smpboot: Booting Node 0 Processor 7 APIC 0x7 >>> [   75.258380] kvm-clock: cpu 7, msr 1042011c1, secondary cpu clock >>> [   75.278828] ------------[ cut here ]------------ >>> [   75.278830] DEAD callback error for CPU7 >>> [   75.278856] WARNING: CPU: 1 PID: 1078 at kernel/cpu.c:1163 >>> _cpu_down+0x20a/0x3a0 >>> [   75.278865] Modules linked in: dm_multipath scsi_dh_rdac >>> scsi_dh_emc scsi_dh_alua intel_rapl_msr intel_rapl_common >>> snd_hda_codec_generic ledtrig_audio kvm_intel snd_hda_intel >>> snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec kvm snd_hda_core >>> rapl input_leds snd_hwdep joydev snd_pcm snd_timer snd serio_raw >>> qemu_fw_cfg mac_hid soundcore sch_fq_codel msr virtio_rng ip_tables >>> x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 >>> async_raid6_recov async_memcpy async_pq async_xor async_tx xor >>> raid6_pq libcrc32c raid1 raid0 multipath linear qxl drm_ttm_helper ttm >>> drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops >>> hid_generic crct10dif_pclmul crc32_pclmul ghash_clmulni_intel cec >>> aesni_intel rc_core crypto_simd virtio_net net_failover usbhid >>> i2c_i801 ahci psmouse cryptd hid i2c_smbus drm lpc_ich libahci >>> virtio_blk failover >>> [   75.278920] CPU: 1 PID: 1078 Comm: bash Not tainted 5.15.0+ #1 >>> [   75.278924] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), >>> BIOS 1.14.0-2 04/01/2014 >>> [   75.278925] RIP: 0010:_cpu_down+0x20a/0x3a0 >>> [   75.278927] Code: 8b 03 41 39 c6 7f 6f 39 45 c0 0f 8e 34 ff ff ff >>> 3d 96 00 00 00 0f 84 be 00 00 00 44 89 ee 48 c7 c7 f3 38 7a a4 e8 26 >>> a2 f9 ff <0f> 0b e9 13 ff ff ff e8 3a bd 52 ff e9 2a ff ff ff f0 48 0f >>> b3 05 >>> [   75.278929] RSP: 0018:ffffb12600d03c98 EFLAGS: 00010282 >>> [   75.278930] RAX: 0000000000000000 RBX: ffff8e9d7bde0660 RCX: >>> 0000000000000000 >>> [   75.278931] RDX: 0000000000000001 RSI: ffffffffa47b6099 RDI: >>> 00000000ffffffff >>> [   75.278932] RBP: ffffb12600d03cd8 R08: 0000000000000000 R09: >>> ffffb12600d03a88 >>> [   75.278933] R10: ffffb12600d03a80 R11: ffffffffa5156908 R12: >>> 0000000000000000 >>> [   75.278934] R13: 0000000000000007 R14: 0000000000000096 R15: >>> 00000000ffffffea >>> [   75.278935] FS:  00007f5b0014a740(0000) GS:ffff8e9d7bc40000(0000) >>> knlGS:0000000000000000 >>> [   75.278937] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >>> [   75.278937] CR2: 000055f4a4e58818 CR3: 0000000115042005 CR4: >>> 0000000000370ee0 >>> [   75.278940] DR0: 0000000000000000 DR1: 0000000000000000 DR2: >>> 0000000000000000 >>> [   75.278941] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: >>> 0000000000000400 >>> [   75.278942] Call Trace: >>> [   75.278943]  >>> [   75.278950]  cpu_device_down+0x34/0x60 >>> [   75.278953]  cpu_subsys_offline+0xe/0x10 >>> [   75.278956]  device_offline+0xe6/0x110 >>> [   75.278957]  online_store+0x53/0xc0 >>> [   75.278959]  dev_attr_store+0x17/0x30 >>> [   75.278962]  sysfs_kf_write+0x3e/0x50 >>> [   75.278964]  kernfs_fop_write_iter+0x137/0x1c0 >>> [   75.278966]  new_sync_write+0x117/0x1a0 >>> [   75.278970]  vfs_write+0x211/0x2a0 >>> [   75.278978]  ksys_write+0x67/0xe0 >>> [   75.278982]  __x64_sys_write+0x19/0x20 >>> [   75.278984]  do_syscall_64+0x5c/0xc0 >>> [   75.279000]  ? irqentry_exit_to_user_mode+0x9/0x20 >>> [   75.279002]  ? irqentry_exit+0x33/0x40 >>> [   75.279004]  ? exc_page_fault+0x89/0x180 >>> [   75.279005]  ? asm_exc_page_fault+0x8/0x30 >>> [   75.279008]  entry_SYSCALL_64_after_hwframe+0x44/0xae >>> [   75.279010] RIP: 0033:0x7f5b00264777 >>> [   75.279016] Code: 10 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 >>> 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 >>> 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 >>> 74 24 >>> [   75.279018] RSP: 002b:00007ffed5e83b58 EFLAGS: 00000246 ORIG_RAX: >>> 0000000000000001 >>> [   75.279020] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: >>> 00007f5b00264777 >>> [   75.279021] RDX: 0000000000000002 RSI: 000055d8774e0b10 RDI: >>> 0000000000000001 >>> [   75.279022] RBP: 000055d8774e0b10 R08: 0000000000000000 R09: >>> 00007f5b00365cf0 >>> [   75.279023] R10: 00007f5b00365cc0 R11: 0000000000000246 R12: >>> 0000000000000002 >>> [   75.279024] R13: 00007f5b00366760 R14: 00007f5b00367560 R15: >>> 00007f5b00366960 >>> [   75.279029]  >>> >>> Colin >>> >>> >>> >>> >> Here is the same BUG but on Xen. I'm producing the error by suspending >> the laptop. >> For anyone following along, when you are bisecting this on Xen you need >> these two commits: >> 8aa83e6395ce047a506f0b16edca45f36c1ae7f8 ("x86/setup: Call >> early_reserve_memory() earlier") >> 96f5bd03e1be606987644b71899ea56a8d05f825 ("xen/balloon: fix balloon >> kthread freezing") >> >> ------------[ cut here ]------------ >> DEAD callback error for CPU1 >> WARNING: CPU: 2 PID: 21738 at kernel/cpu.c:1163 _cpu_down+0x143/0x230 >> Modules linked in: snd_seq_dummy snd_hrtimer snd_seq snd_seq_device snd_timer nf_tables nfnetlink vfat fat intel_rapl_msr think_lmi firmware_attributes_class wm> >> CPU: 2 PID: 21738 Comm: systemd-sleep Tainted: G W 5.15.0-0.fc32.qubes.x86_64 #1 >> Hardware name: LENOVO 20Y1S02400/20Y1S02400, BIOS R1BET65W(1.34 ) 06/17/2021 >> RIP: e030:_cpu_down+0x143/0x230 >> Code: 00 81 3b 96 00 00 00 7e a7 e9 75 ff ff ff 8b 03 44 39 f8 7d b2 3d 96 00 00 00 74 3f 89 ee 48 c7 c7 8b 4e 5e 82 e8 92 d3 f9 ff <0f> 0b eb 99 e8 c4 06 50 ff> >> RSP: e02b:ffffc9004273fd20 EFLAGS: 00010282 >> RAX: 0000000000000000 RBX: ffff8881406606a0 RCX: ffff8881406a0a08 >> RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff8881406a0a00 >> RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 >> R10: 000000000000001d R11: ffffffff834917cc R12: 00000000ffffffea >> R13: 0000000000000000 R14: 0000000000000001 R15: 00000000000000e4 >> FS: 0000787200206b80(0000) GS:ffff888140680000(0000) knlGS:0000000000000000 >> CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033 >> CR2: 000059b42ea71da8 CR3: 0000000005ca0000 CR4: 0000000000050660 >> Call Trace: >> >> freeze_secondary_cpus.cold+0x3d/0x129 >> suspend_enter+0xb7/0x380 >> suspend_devices_and_enter+0x165/0x240 >> enter_state+0x125/0x176 >> pm_suspend.cold+0x20/0x6b >> state_store+0x27/0x50 >> kernfs_fop_write_iter+0x124/0x1b0 >> new_sync_write+0x15c/0x1f0 >> vfs_write+0x1d2/0x270 >> ksys_write+0x67/0xe0 >> do_syscall_64+0x3b/0x90 >> entry_SYSCALL_64_after_hwframe+0x44/0xae >> RIP: 0033:0x7872013292f7 >> Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3> >> RSP: 002b:00007ffefc6d4718 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 >> RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007872013292f7 >> RDX: 0000000000000004 RSI: 00007ffefc6d4800 RDI: 0000000000000004 >> RBP: 00007ffefc6d4800 R08: 00005817137c5ca0 R09: 000000000000000d >> R10: 00005817137c1eb0 R11: 0000000000000246 R12: 0000000000000004 >> R13: 00005817137c12d0 R14: 0000000000000004 R15: 00007872013fb700 >> >> ---[ end trace a9ab6f056496ed14 ]--- >> Error taking CPU1 down: -22 >> >> I'm actively bisecting this, ~6 iterations left, will propably have some more in ~6h or so. >> >> # git bisect log >> # bad: [0594c58161b6e0f3da8efa9c6e3d4ba52b652717] xen/x86: fix PV trap handling on secondary processors >> git bisect start 'HEAD' >> # good: [868c250bb4639531ff33b2d879fbef39c1d9ed39] x86/fpu: Include vmalloc.h for vzalloc() >> git bisect good 868c250bb4639531ff33b2d879fbef39c1d9ed39 >> # bad: [6ab1d4839a486727fdd412bd8bab27417388d381] Merge tag 'platform-drivers-x86-v5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 >> git bisect bad 6ab1d4839a486727fdd412bd8bab27417388d381 >> # good: [84882cf72cd774cf16fd338bdbf00f69ac9f9194] Revert "net: avoid double accounting for pure zerocopy skbs" >> git bisect good 84882cf72cd774cf16fd338bdbf00f69ac9f9194 >> # good: [79ef0c00142519bc34e1341447f3797436cc48bf] Merge tag 'trace-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace >> git bisect good 79ef0c00142519bc34e1341447f3797436cc48bf >> # good: [e848c714dbda4d6f0ad17a4d374af0ce9fcd1615] Revert "drm/amd/display: Fix error in dmesg at boot" >> git bisect good e848c714dbda4d6f0ad17a4d374af0ce9fcd1615 >> # good: [a64a325bf6313aa5cde7ecd691927e92892d1b7f] Merge tag 'afs-next-20211102' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs >> git bisect good a64a325bf6313aa5cde7ecd691927e92892d1b7f >> # good: [d9bd054177fbd2c4762546aec40fc3071bfe4cc0] Merge tag 'amd-drm-next-5.16-2021-10-29' of https://gitlab.freedesktop.org/agd5f/linux into drm-next >> git bisect good d9bd054177fbd2c4762546aec40fc3071bfe4cc0 >> # bad: [833db72142b93a89211c1e43ca0a1e2e16457756] Merge tag 'pm-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm >> git bisect bad 833db72142b93a89211c1e43ca0a1e2e16457756 >> >> Regards >> Josef >> > > Here's the bad commit > 4570ddda43387e5a130dd85e71a1947b0c11da77 ("powercap/drivers/dtpm: > Encapsulate even more the code") > > Added CC: Lukasz Luba , Daniel Lezcano > > > Here's the bisect log: > # bad: [0594c58161b6e0f3da8efa9c6e3d4ba52b652717] xen/x86: fix PV trap > handling on secondary processors > git bisect start 'HEAD' > # good: [868c250bb4639531ff33b2d879fbef39c1d9ed39] x86/fpu: Include > vmalloc.h for vzalloc() > git bisect good 868c250bb4639531ff33b2d879fbef39c1d9ed39 > # bad: [6ab1d4839a486727fdd412bd8bab27417388d381] Merge tag > 'platform-drivers-x86-v5.16-1' of > git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 > git bisect bad 6ab1d4839a486727fdd412bd8bab27417388d381 > # good: [84882cf72cd774cf16fd338bdbf00f69ac9f9194] Revert "net: avoid > double accounting for pure zerocopy skbs" > git bisect good 84882cf72cd774cf16fd338bdbf00f69ac9f9194 > # good: [79ef0c00142519bc34e1341447f3797436cc48bf] Merge tag > 'trace-v5.16' of > git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace > git bisect good 79ef0c00142519bc34e1341447f3797436cc48bf > # good: [e848c714dbda4d6f0ad17a4d374af0ce9fcd1615] Revert > "drm/amd/display: Fix error in dmesg at boot" > git bisect good e848c714dbda4d6f0ad17a4d374af0ce9fcd1615 > # good: [a64a325bf6313aa5cde7ecd691927e92892d1b7f] Merge tag > 'afs-next-20211102' of > git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs > git bisect good a64a325bf6313aa5cde7ecd691927e92892d1b7f > # good: [d9bd054177fbd2c4762546aec40fc3071bfe4cc0] Merge tag > 'amd-drm-next-5.16-2021-10-29' of > https://gitlab.freedesktop.org/agd5f/linux into drm-next > git bisect good d9bd054177fbd2c4762546aec40fc3071bfe4cc0 > # bad: [833db72142b93a89211c1e43ca0a1e2e16457756] Merge tag > 'pm-5.16-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm > git bisect bad 833db72142b93a89211c1e43ca0a1e2e16457756 > # good: [33fb42636a938be01d951b4cee68127a59a1e7e4] Merge branch > 'ucount-fixes-for-v5.16' of > git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace > git bisect good 33fb42636a938be01d951b4cee68127a59a1e7e4 > # good: [c0d6586afa3546a3d148cf4b9d9a407b4f79d0bb] Merge tag > 'acpi-5.16-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm > git bisect good c0d6586afa3546a3d148cf4b9d9a407b4f79d0bb > # good: [b62b306469b36fae7030c0ad4ffa11de0c9b9957] Merge branch 'pm-sleep' > git bisect good b62b306469b36fae7030c0ad4ffa11de0c9b9957 > # good: [8e5b4779f6c50d118b3056bbb07c886b9ff8d112] Merge branches > 'pm-cpufreq' and 'pm-cpuidle' > git bisect good 8e5b4779f6c50d118b3056bbb07c886b9ff8d112 > # good: [e458716a92b57f854deb89bb40aa3554c2b6205e] PM: EM: Mark > inefficiencies in CPUFreq > git bisect good e458716a92b57f854deb89bb40aa3554c2b6205e > # good: [e458716a92b57f854deb89bb40aa3554c2b6205e] PM: EM: Mark > inefficiencies in CPUFreq > git bisect good e458716a92b57f854deb89bb40aa3554c2b6205e > # bad: [eb82bace893169b319c563b7f813c58a0a5a9f76] powercap/drivers/dtpm: > Scale the power with the load > git bisect bad eb82bace893169b319c563b7f813c58a0a5a9f76 > # bad: [7a89d7eacf8e84f2afb94db5ae9d9f9faa93f01c] powercap/drivers/dtpm: > Simplify the dtpm table > git bisect bad 7a89d7eacf8e84f2afb94db5ae9d9f9faa93f01c > -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog