From: Sean Christopherson <seanjc@google.com>
To: Vipin Sharma <vipinsh@google.com>
Cc: David Rientjes <rientjes@google.com>,
Janosch Frank <frankja@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Thomas <thomas.lendacky@amd.com>,
pbonzini@redhat.com, tj@kernel.org, lizefan@huawei.com,
joro@8bytes.org, corbet@lwn.net, Brijesh <brijesh.singh@amd.com>,
Jon <jon.grimm@amd.com>, Eric <eric.vantassell@amd.com>,
gingell@google.com, kvm@vger.kernel.org, x86@kernel.org,
cgroups@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC Patch 0/2] KVM: SVM: Cgroup support for SVM SEV ASIDs
Date: Tue, 24 Nov 2020 23:18:14 +0000 [thread overview]
Message-ID: <20201124231814.GA258638@google.com> (raw)
In-Reply-To: <20201124222149.GB65542@google.com>
On Tue, Nov 24, 2020, Vipin Sharma wrote:
> On Tue, Nov 24, 2020 at 09:27:25PM +0000, Sean Christopherson wrote:
> > Is a root level stat file needed? Can't the infrastructure do .max - .current
> > on the root cgroup to calculate the number of available ids in the system?
>
> For an efficient scheduling of workloads in the cloud infrastructure, a
> scheduler needs to know the total capacity supported and the current
> usage of the host to get the overall picture. There are some issues with
> .max -.current approach:
>
> 1. Cgroup v2 convention is to not put resource control files in the
> root. This will mean we need to sum (.max -.current) in all of the
> immediate children of the root.
Ah, that's annoying. Now that you mention it, I do vaguely recall this behavior.
> 2. .max can have any limit unless we add a check to not allow a user to
> set any value more than the supported one.
Duh, didn't think that one through.
Thanks!
next prev parent reply other threads:[~2020-11-24 23:18 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 0:40 [RFC Patch 0/2] KVM: SVM: Cgroup support for SVM SEV ASIDs Vipin Sharma
2020-09-22 0:40 ` [RFC Patch 1/2] KVM: SVM: Create SEV cgroup controller Vipin Sharma
2020-09-22 1:04 ` Randy Dunlap
2020-09-22 1:22 ` Sean Christopherson
2020-09-22 16:05 ` Vipin Sharma
2020-11-03 16:39 ` James Bottomley
2020-11-03 18:10 ` Sean Christopherson
2020-11-03 22:43 ` James Bottomley
2020-09-22 0:40 ` [RFC Patch 2/2] KVM: SVM: SEV cgroup controller documentation Vipin Sharma
2020-09-22 1:48 ` [RFC Patch 0/2] KVM: SVM: Cgroup support for SVM SEV ASIDs Sean Christopherson
2020-09-22 21:14 ` Vipin Sharma
[not found] ` <20200924192116.GC9649@linux.intel.com>
2020-09-24 19:55 ` Tom Lendacky
2020-09-25 22:22 ` Vipin Sharma
2020-10-02 20:48 ` Vipin Sharma
2020-11-03 2:06 ` Sean Christopherson
2020-11-14 0:26 ` David Rientjes
2020-11-24 19:16 ` Sean Christopherson
2020-11-24 19:49 ` Vipin Sharma
2020-11-24 20:18 ` David Rientjes
2020-11-24 21:08 ` Vipin Sharma
2020-11-24 21:27 ` Sean Christopherson
2020-11-24 22:21 ` Vipin Sharma
2020-11-24 23:18 ` Sean Christopherson [this message]
2020-11-27 18:01 ` Christian Borntraeger
2020-10-01 18:08 ` Peter Gonda
2020-10-01 22:44 ` Tom Lendacky
2020-09-23 12:47 ` Paolo Bonzini
2020-09-28 9:12 ` Janosch Frank
2020-09-28 9:21 ` Christian Borntraeger
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