From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl0-f72.google.com (mail-pl0-f72.google.com [209.85.160.72]) by kanga.kvack.org (Postfix) with ESMTP id 950076B026E for ; Fri, 13 Apr 2018 09:44:17 -0400 (EDT) Received: by mail-pl0-f72.google.com with SMTP id y7-v6so5904603plh.7 for ; Fri, 13 Apr 2018 06:44:17 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id m18si3935620pgu.352.2018.04.13.06.44.16 for (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 13 Apr 2018 06:44:16 -0700 (PDT) Date: Fri, 13 Apr 2018 15:44:14 +0200 From: Michal Hocko Subject: Re: [PATCH RFC 0/8] mm: online/offline 4MB chunks controlled by device driver Message-ID: <20180413134414.GS17484@dhcp22.suse.cz> References: <20180413131632.1413-1-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180413131632.1413-1-david@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: David Hildenbrand Cc: linux-mm@kvack.org [If you choose to not CC the same set of people on all patches - which is sometimes a legit thing to do - then please cc them to the cover letter at least.] On Fri 13-04-18 15:16:24, David Hildenbrand wrote: > I am right now working on a paravirtualized memory device ("virtio-mem"). > These devices control a memory region and the amount of memory available > via it. Memory will not be indicated via ACPI and friends, the device > driver is responsible for it. How does this compare to other ballooning solutions? And why your driver cannot simply use the existing sections and maintain subsections on top? -- Michal Hocko SUSE Labs