linux-kernel - Re: [Qemu-devel] [RFC qemu 0/4] A PV solution for live migration optimization

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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