Re: [libvirt-users] Networking issues in host

I realize this falls under the category of "so incredibly vague I should maybe not send it", so I have low expectations and apologize beforehand if it's just pure noise. That being said - it appears that the whole HOST system becomes laggy. It can effect the mouse, the keyboard, the network. There are no messages in the logs that I can find that indicate the system is blocked or hung or dumping core - and frankly I just don't know where to start troubleshooting something like this when there's absolutely no indication in the logs that things are struggling. What I DO know about the symptoms: 1. happen after an indeterminate period of time 2. continue even if I shutdown libvirtd and the two guests - a reboot is REQUIRED 3. do NOT occur if I leave libvirtd disabled and NEVER start it Which, on review, seems it might have something to do with the KVM kernel module - so I'm copying that mailing list as well. root@eanna i ~ # pacman -Qi linux Name : linux Version : 3.18.6-1 Description : The Linux kernel and modules Architecture : x86_64 ... Build Date : Fri 06 Feb 2015 11:46:13 PM PST Install Date : Thu 19 Mar 2015 03:58:50 PM PDT Install Reason : Explicitly installed Install Script : Yes Validated By : None root@eanna i ~ # modinfo kvm filename: /lib/modules/3.18.6-1-ARCH/kernel/arch/x86/kvm/kvm.ko.gz license: GPL author: Qumranet depends: intree: Y vermagic: 3.18.6-1-ARCH SMP preempt mod_unload modversions parm: ignore_msrs:bool parm: min_timer_period_us:uint parm: tsc_tolerance_ppm:uint parm: allow_unsafe_assigned_interrupts:Enable device assignment on platforms without interrupt remapping support. (bool) root@eanna i ~ # grep -P "^(?\!#).*GRUB_CMDLINE" /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_osi=Linux iommu=pt iommu=1 transparent_hugepage=never" GRUB_CMDLINE_LINUX="" On Wed, Mar 25, 2015 at 9:53 AM, G. Richard Bellamy <rbellamy(a)pteradigm.com&gt; wrote: