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Message-ID: <56D9B6C2.3070708@redhat.com> Date: Fri, 4 Mar 2016 17:24:34 +0100 From: Paolo Bonzini <pbonzini@...hat.com> To: "Li, Liang Z" <liang.z.li@...el.com>, Roman Kagan <rkagan@...tuozzo.com> Cc: "Dr. David Alan Gilbert" <dgilbert@...hat.com>, "ehabkost@...hat.com" <ehabkost@...hat.com>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "mst@...hat.com" <mst@...hat.com>, "quintela@...hat.com" <quintela@...hat.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "qemu-devel@...gnu.org" <qemu-devel@...gnu.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "amit.shah@...hat.com" <amit.shah@...hat.com>, "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>, "virtualization@...ts.linux-foundation.org" <virtualization@...ts.linux-foundation.org>, "rth@...ddle.net" <rth@...ddle.net> Subject: Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization On 04/03/2016 15:26, Li, Liang Z wrote: >> > >> > The memory usage will keep increasing due to ever growing caches, etc, so >> > you'll be left with very little free memory fairly soon. >> > > I don't think so. > Roman is right. For example, here I am looking at a 64 GB (physical) machine which was booted about 30 minutes ago, and which is running disk-heavy workloads (installing VMs). Since I have started writing this email (2 minutes?), the amount of free memory has already gone down from 37 GB to 33 GB. I expect that by the time I have finished running the workload, in two hours, it will not have any free memory. Paolo
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