Does anyone have a suggestion on next steps, or should I await the next
kernel in hopes this regression is corrected?

I call it regression, as I found a patch-set from April of 2014[1] which
appears to correct this exact problem. I'm not sophisticated enough to know
how I would determine that one way or another, so I'm really just guessing
here.

[1] https://lkml.org/lkml/2014/4/22/562

On Sat, Oct 3, 2015 at 5:19 PM, G. Richard Bellamy <rbell...@pteradigm.com>
wrote:

> What happens: Kernel logs message to journal, kvm VMs no longer work. Kernel 
> messages spew at a rate of ~660/sec.
> What should happen: Kernel boots and kvm VMs start.
>
> Affected kernels: 4.2.1 & 4.2.1
>
> Unaffected kernel: 4.1.9
>
> ------------------------------------------------
> GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_osi=Linux iommu=pt iommu=1 
> transparent_hugepage=never"
> ------------------------------------------------
> I would attach my journal, except it is literally full of MB of lines just 
> repeating what is in the summary:
>
> 2015-10-01 08:38:40
> root@eanna i ~ # journalctl --disk-usage
> Archived and active journals take up 3.9G on disk.
>
> ver_linux:
> ------------------------------------------------
> Linux eanna 4.2.1-1-ARCH #1 SMP PREEMPT Tue Sep 22 06:57:07 CEST 2015 x86_64 
> GNU/Linux
>
> Gnu C                  5.2.0
> Gnu make               4.1
> binutils               2.25.1
> util-linux             2.27
> mount                  debug
> module-init-tools      21
> e2fsprogs              1.42.12
> jfsutils               1.1.15
> reiserfsprogs          3.6.24
> xfsprogs               4.2.0
> pcmciautils            018
> PPP                    2.4.7
> Linux C Library        Dynamic linker (ldd)   2.22
> Linux C++ Library      6.0.21
> Net-tools              2.10-alpha
> Kbd                    2.0.3
> Sh-utils               8.24
> wireless-tools         30
> Modules Loaded         nls_utf8 udf crc_itu_t ses enclosure uas usb_storage 
> vhost_net vhost macvtap macvlan 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 bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables 
> iptable_filter fuse arc4 sch_fq_codel rt2800usb rt2x00usb rt2800lib rt2x00lib 
> mac80211 fan thermal nfs fscache uvcvideo videobuf2_vmalloc snd_usb_audio 
> videobuf2_memops videobuf2_core v4l2_common cfg80211 snd_usbmidi_lib videodev 
> input_leds led_class evdev joydev media crc_ccitt mousedev amdkfd mac_hid 
> rfkill kvm_amd amd_iommu_v2 snd_hda_codec_hdmi kvm radeon crct10dif_pclmul 
> crc32_pclmul snd_virtuoso snd_hda_intel ghash_clmulni_intel snd_oxygen_lib 
> cp210x snd_mpu401_uart aesni_intel usbserial snd_hda_codec ttm snd_rawmidi 
> aes_x86_64 lrw drm_kms_helper gf128mul snd_hda_core igb glue_helper 
> ablk_helper cryptd snd_hwdep snd_seq_device snd_pcm snd_timer drm 
> amd64_edac_mod snd ptp soundcore pps_core dca i2c_algo_bit edac_core 
> serio_raw pcspkr psmouse k10temp edac_mce_amd sp5100_tco fam15h_power 
> i2c_piix4 shpchp tpm_tis tpm button acpi_cpufreq processor nfsd auth_rpcgss 
> oid_registry nfs_acl lockd grace sunrpc ipmi_si ipmi_devintf ipmi_msghandler 
> ip_tables x_tables btrfs xor raid6_pq sr_mod cdrom hid_generic usbhid hid 
> sd_mod atkbd libps2 crc32c_intel xhci_pci xhci_hcd ahci ohci_pci libahci 
> ohci_hcd ehci_pci mpt2sas ehci_hcd raid_class libata scsi_transport_sas 
> usbcore usb_common scsi_mod i8042 serio
>
>
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