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Re: [Qemu-devel] Kernel Panic on Yum update

From: Gerhard Wiesinger
Subject: Re: [Qemu-devel] Kernel Panic on Yum update
Date: Fri, 15 May 2015 09:37:48 +0200
User-agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0

On 15.05.2015 08:51, Paolo Bonzini wrote:

On 15/05/2015 08:34, Gerhard Wiesinger wrote:

I'm using latest qemu-kvm-2.3.0-3.fc21.x86_64 from libvirt repository
(updated afterwards). Running yum regularly crashes the VM like below.
VM is stripped down to minimum memory requirements (256MB) for owncloud.
See below.

Looks like a problem in virtio-net or a kernel bug with low memory
You're simply running out of memory.  Yum can be a memory hog.

Yes, yum takes memory. But there is ~2.2 GB virt memory available. That should be enough. Therefore I think it is a kernel problem. As in previous crashes on the mailing list there is a lot of swap available (2GB) which isn't touched in ANY way.

Under normal conditions without yum:
total used free shared buff/cache available
Mem:         243036      132540       12716       15520 97780       74964
Swap:       2064380           0     2064380

And running it after reboot works fine (with all the services up).


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