Re: 2.6.25-rc5-git5 KVM memory not freed

[Avi Kivity <avi@qumranet.com>]

Ioan Ionita wrote:
> Hi,
>
> I'm using KVM and the qemu kvm modified to run a windows guest. I'm
> allocating 900 MB to the guest. Seems that when I terminate a qemu
> process, the memory that was allocated to qemu is not freed:
>
>
> Mem:       2058140    1739156     318984          0     226944     425140
> -/+ buffers/cache:    1087072     971068
> Swap:            0          0          0
>
> So I'm using 1GB of ram even though I've terminated qemu. If I attempt
> to start qemu again, the machine locks up. No message in the logs.
>
> Command to start qemu:
> /usr/local/kvm/bin/qemu-system-x86_64 b.data -no-acpi -m 900 -net nic
> -net user -hdb temp.raw -usbdevice tablet
>
> uname -a
> Linux ops-desktop 2.6.25-rc5-git5 #1 SMP PREEMPT Sat Mar 15 14:47:25
> EET 2008 x86_64 GNU/Linux
>
>
> Not sure whether this is a problem on the kernel side.  I don't
> pretend to understand linux memory management. But it wasn't occurring
> with older kernels. I'll attempt to bisect.
>   

I reproduced this and am investigating.


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