On 03/19/2017 02:18 PM, andres...@gmail.com wrote:
> Hello!
> When I close all terminals from a VM, CPU usage for that VM goes to around 
> 50% (shown by Qubes Manager) and stays there until I open another terminal to 
> the same VM. The problem only happens if I close the terminal using Ctrl+d, 
> not if I kill the window using i3.
> This happens both with Arch Linux template or appvms based on it. Doesn't 
> happens with Fedora.
> Example of commands that I used to open the terminals:
> qvm-run -a archlinux "xterm /bin/bash"
> qvm-run -a archappvm "xfce4-terminal -x /bin/zsh"
> (both bash or zsh, xterm or xfce4-terminal)
> I thought it could be some zsh config, but the problem persists even 
> commenting .zshrc content, or using bash (default configs).
> It also happens if I open Vim with something like:
> qvm-run -a archappvm "xfce4-terminal -x vim"
> and close it using ":q". If I close Vim killing the window (i3 hotkey), it 
> doesn't happens).
> I tried to log CPU usage from inside the VM using "ps", but it doesn't seem 
> to increase (no reported process started to consume more CPU). I thought it 
> could be a problem with Qubes Manager (displaying false high CPU usage), but 
> the fan do start to make more noise, so it must be using more CPU.
> Any ideas?
> Thanks for the attention!
Is it related to https://github.com/QubesOS/qubes-issues/issues/2702 ?

Try running as root:
# echo core > /proc/sys/kernel/core_pattern

When shutting down a VM, some service is apparently crashing, causing a
high CPU usage.

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