linux-kernel - Re: Allocating dedicated RAM to host that guest can not use

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Message-ID: <CAN8oO4Dc2EUtJkhULaV6CJ2RmF1aMXmNBEOwiMEbJ0mrt3ndNQ@mail.gmail.com>
Date:	Thu, 27 Nov 2014 17:46:06 +0530
From:	mad Engineer <themadengin33r@...il.com>
To:	Wanpeng Li <wanpeng.li@...ux.intel.com>
Cc:	kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Allocating dedicated RAM to host that guest can not use

a random thought can we set qemu user/group rss to a particular hard
limit in limits.conf

Can this work?

On Thu, Nov 27, 2014 at 5:39 PM, mad Engineer <themadengin33r@...il.com> wrote:
> never tried that.
> can we do that transparently ie with out setting cgroups for each
> virtul machines?.
> A global group such that all combined virtual machines RAM utilization
> to be with in a specific value ?
>
> On Thu, Nov 27, 2014 at 4:59 PM, Wanpeng Li <wanpeng.li@...ux.intel.com> wrote:
>> On Thu, Nov 27, 2014 at 05:12:52PM +0530, mad Engineer wrote:
>>>Hi,
>>>    Is there any way to set some RAM dedicated to host that guest can
>>>not access?
>>>Similar to setting RAM to Dom0 in Xen.
>>>
>>>I am over committing RAM for the instances but don't want host to swap.
>>>
>>>i understand that virtual machines are process,but can we achieve this
>>
>> How about limit the memory of which guest can access through memory cgroup?
>>
>> Regards,
>> Wanpeng Li
>>
>>>
>>>Thanks
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