4:37 p.m.
Hi together,
when I´m starting a VM my host freezes gradually. This seems to happen
because its running out of memory and no other process is able to do
anything.
I have 16GB of ram in total. 8GB are reserved for hugepages. So for the
daily business on the host I have 8GB left. I don´t run many or
extraordinary consuming software on the host - normally just a gnome
session and the chromium browser. Right now htop tells me that 10.1 of 15.4
GB are occupied, so that should be about 2GB, because I suppose 8GB are
just reserved for the hugepages. I don´t have any swap space.
In my latest attempt I gave a newly created VM 64MB of ram and this also
brought the system down to its knees. So I would like to understand why
this is happening. Is it some configuration issue I'm not aware of or maybe
even some bug? Can someone give any idea on this?
Thanks in advance
Alex
4:18 a.m.
Could you tell me you libvirt and kernel version? What is your hypervisor? Kvm or xen? And
hypervisor's version?
----- Original Message -----
From: "Alexander Petrenz" <petrenz.a(a)gmail.com>
To: libvirt-users(a)redhat.com
Sent: Saturday, May 7, 2016 5:37:41 AM
Subject: [libvirt-users] host freeze when starting VM
Hi together,
when I´m starting a VM my host freezes gradually. This seems to happen because its running
out of memory and no other process is able to do anything.
I have 16GB of ram in total. 8GB are reserved for hugepages. So for the daily business on
the host I have 8GB left. I don´t run many or extraordinary consuming software on the host
- normally just a gnome session and the chromium browser. Right now htop tells me that
10.1 of 15.4 GB are occupied, so that should be about 2GB, because I suppose 8GB are just
reserved for the hugepages. I don´t have any swap space.
In my latest attempt I gave a newly created VM 64MB of ram and this also brought the
system down to its knees. So I would like to understand why this is happening. Is it some
configuration issue I'm not aware of or maybe even some bug? Can someone give any idea
on this?
Thanks in advance
Alex
_______________________________________________
libvirt-users mailing list
libvirt-users(a)redhat.com
https://www.redhat.com/mailman/listinfo/libvirt-users
4:22 p.m.
Hi Han,
thanks for your reply. I'm using KVM as hypervisor. The versions are:
Kernel: 4.5.2
Libvirt: 1.3.4-1
But its quite embarrasing... when I was answering your mail I was having a
look if there is a new kernel I can build, since I have to rely on some
patches. I upgraded from 4.4.3 to 4.5.2 and now libvirt doesn´t have any
problem.
So thanks for the heads up!
Regards
Alex
On Tue, May 10, 2016 at 11:18 AM, Han Han <hhan(a)redhat.com> wrote:
Could you tell me you libvirt and kernel version? What is your
hypervisor?
Kvm or xen? And hypervisor's version?
----- Original Message -----
From: "Alexander Petrenz" <petrenz.a(a)gmail.com>
To: libvirt-users(a)redhat.com
Sent: Saturday, May 7, 2016 5:37:41 AM
Subject: [libvirt-users] host freeze when starting VM
Hi together,
when I´m starting a VM my host freezes gradually. This seems to happen
because its running out of memory and no other process is able to do
anything.
I have 16GB of ram in total. 8GB are reserved for hugepages. So for the
daily business on the host I have 8GB left. I don´t run many or
extraordinary consuming software on the host - normally just a gnome
session and the chromium browser. Right now htop tells me that 10.1 of 15.4
GB are occupied, so that should be about 2GB, because I suppose 8GB are
just reserved for the hugepages. I don´t have any swap space.
In my latest attempt I gave a newly created VM 64MB of ram and this also
brought the system down to its knees. So I would like to understand why
this is happening. Is it some configuration issue I'm not aware of or maybe
even some bug? Can someone give any idea on this?
Thanks in advance
Alex
_______________________________________________
libvirt-users mailing list
libvirt-users(a)redhat.com
https://www.redhat.com/mailman/listinfo/libvirt-users
10:20 p.m.
It seems a kernel bug as your description. And I found some kvm problems fixed in 4.4.4:
* Tue Nov 10 2015 Laura Abbott <labbott(a)redhat.com> - 4.4.0-0.rc0.git6.1 - Linux
v4.3-9393-gbd4f203 * Tue Nov 10 2015 Josh Boyer <jwboyer(a)fedoraproject.org> - Fix
Yoga 900 rfkill switch issues (rhbz 1275490) - Fix incorrect size calculations in megaraid
with 64K pages (rhbz 1269300) - CVE-2015-8104 kvm: DoS infinite loop in microcode DB
exception (rhbz 1278496 1279691) - CVE-2015-5307 kvm: DoS infinite loop in microcode AC
exception (rhbz 1277172 1279688)
----- Original Message -----
From: "Alexander Petrenz" <petrenz.a(a)gmail.com>
To: "Han Han" <hhan(a)redhat.com>
Cc: libvirt-users(a)redhat.com
Sent: Thursday, May 12, 2016 5:22:11 AM
Subject: Re: [libvirt-users] host freeze when starting VM
Hi Han,
thanks for your reply. I'm using KVM as hypervisor. The versions are:
Kernel: 4.5.2
Libvirt: 1.3.4-1
But its quite embarrasing... when I was answering your mail I was having a
look if there is a new kernel I can build, since I have to rely on some
patches. I upgraded from 4.4.3 to 4.5.2 and now libvirt doesn´t have any
problem.
So thanks for the heads up!
Regards
Alex
On Tue, May 10, 2016 at 11:18 AM, Han Han <hhan(a)redhat.com> wrote:
Could you tell me you libvirt and kernel version? What is your
hypervisor?
Kvm or xen? And hypervisor's version?
----- Original Message -----
From: "Alexander Petrenz" <petrenz.a(a)gmail.com>
To: libvirt-users(a)redhat.com
Sent: Saturday, May 7, 2016 5:37:41 AM
Subject: [libvirt-users] host freeze when starting VM
Hi together,
when I´m starting a VM my host freezes gradually. This seems to happen
because its running out of memory and no other process is able to do
anything.
I have 16GB of ram in total. 8GB are reserved for hugepages. So for the
daily business on the host I have 8GB left. I don´t run many or
extraordinary consuming software on the host - normally just a gnome
session and the chromium browser. Right now htop tells me that 10.1 of 15.4
GB are occupied, so that should be about 2GB, because I suppose 8GB are
just reserved for the hugepages. I don´t have any swap space.
In my latest attempt I gave a newly created VM 64MB of ram and this also
brought the system down to its knees. So I would like to understand why
this is happening. Is it some configuration issue I'm not aware of or maybe
even some bug? Can someone give any idea on this?
Thanks in advance
Alex
_______________________________________________
libvirt-users mailing list
libvirt-users(a)redhat.com
https://www.redhat.com/mailman/listinfo/libvirt-users
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3 comments
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