kvm fpu warning on 4.14.89

cagnulein cagnulein at gmail.com
Mon Mar 11 15:36:52 CET 2019


Hi Jan, did you get any chance to look at my issue?
Thanks

Il ven 1 mar 2019, 15:58 Jan Kiszka <jan.kiszka at siemens.com> ha scritto:

> On 01.03.19 15:21, cagnulein wrote:
> > Hi, with the last git the warning disappear, thanks.
> > Now I would like to submit a new issue : with the last git and with the
> 4.14.89
> > also, if I run latency-test without the kvm guest on, everything works
> fine.
> > If I run latency-test with the kvm guest on the system hangs! The entire
> system
> > not only the guest.
> > This doesn't happen with the 4.9.146.
> > Any hints to debug it?
>
> Hmm, this will be more complicated in fact. I need to try reproducing that
> in
> KVM (nested setup) because that allows insights to be obtained more easily.
>
> Jan
>
> > Thanks in advance
> >
> > Il ven 1 mar 2019, 11:30 cagnulein <cagnulein at gmail.com
> > <mailto:cagnulein at gmail.com>> ha scritto:
> >
> >     Yes qemu on a xenomai kernel (host device). My guest is a windows 10
> 2019.
> >
> >     I'm already compiling the last git. I will let you know.
> >     Thanks
> >
> >     Il ven 1 mar 2019, 11:24 Jan Kiszka <jan.kiszka at siemens.com
> >     <mailto:jan.kiszka at siemens.com>> ha scritto:
> >
> >         On 01.03.19 10:35, cagnulein via Xenomai wrote:
> >          > I’m testing the 4.14.89 ipipe (i was usually using 4.9.146)
> and i’ve
> >         got a
> >          > deterministic warning every time i start qemu. Is it already
> known?
> >          >
> >
> >         Thanks for reporting. I suppose this wasn't tested in a while.
> >
> >         Just to be sure: You are starting QEMU/KVM *on* a Xenomai
> kernel, and *not*
> >         Xenomai as KVM guest, right?
> >
> >         Could you also give latest
> https://gitlab.denx.de/Xenomai/ipipe-x86/ a
> >         try, if
> >         something happened to have changed?
> >
> >         I will try to reproduce ASAP.
> >
> >         Jan
> >
> >          > Thanks
> >          >
> >          > R.
> >          >
> >          >
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078798] WARNING:
> CPU: 0 PID:
> >         1154
> >          > at ./arch/x86/include/asm/fpu/internal.h:617
> __kernel_fpu_end+0x8b/0xa0
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078802] Modules
> linked in:
> >          > hid_generic usbhid hid xt_CHECKSUM iptable_mangle
> ipt_MASQUERADE
> >          > nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat
> nf_conntrack_ipv4
> >          > nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT
> nf_reject_ipv4
> >          > xt_tcpudp tun ebtable_filter ebtables ip6table_filter
> ip6_tables
> >          > iptable_filter bridge stp llc intel_rapl x86_pkg_temp_thermal
> coretemp
> >          > kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul
> ghash_clmulni_intel
> >          > pcbc i2c_designware_platform i2c_designware_core nls_ascii
> nls_cp437 vfat
> >          > fat aesni_intel aes_x86_64 crypto_simd glue_helper cryptd
> intel_cstate
> >          > intel_rapl_perf pcspkr i915 prime_numbers lpc_ich
> drm_kms_helper drm
> >         idma64
> >          > fb_sys_fops mei_me syscopyarea intel_lpss_pci sysfillrect
> intel_lpss
> >          > sysimgblt mfd_core mei shpchp sg evdev video ip_tables
> x_tables autofs4
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078913]  ext4 crc16
> mbcache jbd2
> >          > fscrypto btrfs zstd_decompress zstd_compress xxhash raid10
> raid456
> >          > async_raid6_recov async_memcpy async_pq async_xor async_tx
> xor raid6_pq
> >          > libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod
> sd_mod
> >          > mmc_block igb i2c_algo_bit dca ahci sdhci_pci sdhci xhci_pci
> libahci ptp
> >          > crc32c_intel i2c_i801 xhci_hcd mmc_core pps_core libata
> usbcore scsi_mod
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078982] CPU: 0 PID:
> 1154 Comm:
> >          > qemu-system-x86 Not tainted 4.14.89 #1
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078985] I-pipe
> domain: Linux
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078988] task:
> ffff94aff6f49c80
> >          > task.stack: ffffb5be80a58000
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078991] RIP:
> >          > 0010:__kernel_fpu_end+0x8b/0xa0
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078994] RSP:
> >         0018:ffffb5be80a5bcf8
> >          > EFLAGS: 00010246
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.078999] RAX:
> >         00000000ffffff00 RBX:
> >          > ffff94aff6e88000 RCX: ffff94aff6f49c80
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079002] RDX:
> >         00000000ffffffff RSI:
> >          > 0000000000000246 RDI: ffff94aff6f4a800
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079005] RBP:
> >         ffffb5be80a5bdd0 R08:
> >          > ffffffffc0c1c060 R09: ffff94aff6f8f000
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079010] R10:
> >         0000000000004bc0 R11:
> >          > ffff94afe4680008 R12: ffffffffc0ca0f80
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079013] R13:
> >         0000000000000000 R14:
> >          > ffff94aff6e88000 R15: ffff94aff83c9bc0
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079017] FS:
> >          > 00007f388aba8700(0000) GS:ffff94affb200000(0000)
> knlGS:0000000000000000
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079020] CS:  0010
> DS: 0000 ES:
> >          > 0000 CR0: 0000000080050033
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079023] CR2:
> >         000001b737101034 CR3:
> >          > 0000000178424000 CR4: 00000000003426f0
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079026] Call Trace:
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079029]
> >          > kvm_put_guest_fpu.part.165+0x43/0xc0 [kvm]
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079032]
> >          > kvm_arch_vcpu_ioctl_run+0x6bd/0x18a0 [kvm]
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079035]  ?
> >          > kvm_arch_vcpu_load+0x4d/0x250 [kvm]
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079038]  ?
> >         vmx_vcpu_load+0x5/0x3e0
> >          > [kvm_intel]
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079041]  ?
> >          > kvm_arch_vcpu_load+0x68/0x250 [kvm]
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079044]  ?
> >          > kvm_vcpu_ioctl+0x315/0x5f0 [kvm]
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079047]  ?
> >          > kvm_arch_vcpu_ioctl_run+0x5/0x18a0 [kvm]
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079050]
> >          > kvm_vcpu_ioctl+0x315/0x5f0 [kvm]
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079053]
> do_vfs_ioctl+0xa2/0x620
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079056]
> SyS_ioctl+0x74/0x80
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079059]
> >         do_syscall_64+0x86/0x140
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079062]
> >          > entry_SYSCALL_64_after_hwframe+0x3d/0xa2
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079065] RIP:
> 0033:0x7f389962edd7
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079068] RSP:
> >         002b:00007f388aba7828
> >          > EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079073] RAX:
> >         ffffffffffffffda RBX:
> >          > 0000000000000000 RCX: 00007f389962edd7
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079076] RDX:
> >         0000000000000000 RSI:
> >          > 000000000000ae80 RDI: 000000000000001b
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079079] RBP:
> >         00007f388aba7920 R08:
> >          > 0000558c6bf3a900 R09: 00000000000000ff
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079082] R10:
> >         00007f388aba7840 R11:
> >          > 0000000000000246 R12: 0000000000000000
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079085] R13:
> >         00007ffec978276f R14:
> >          > 0000000000000000 R15: 00007f389e9b9040
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079088] Code: 89 3c
> 24 eb 0a
> >         0f 1f
> >          > 00 db e2 0f 77 db 04 24 0f 1f 44 00 00 b8 ff ff ff ff 89 c2
> 48 0f c7
> >         1f eb
> >          > ad 48 0f ae 89 80 0b 00 00 eb a3 <0f> 0b eb aa e8 ac 37 04 00
> 66 90 66 2e
> >          > 0f 1f 84 00 00 00 00 00
> >          >
> >          > Mar  1 01:14:05 debiankvm kernel: [   96.079184] ---[ end
> trace
> >          > 97cffb6b036eaaeb ]---
> >          >
> >
> >         --
> >         Siemens AG, Corporate Technology, CT RDA IOT SES-DE
> >         Corporate Competence Center Embedded Linux
> >
>
> --
> Siemens AG, Corporate Technology, CT RDA IOT SES-DE
> Corporate Competence Center Embedded Linux
>


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