From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-dev-return-3304-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [66.179.20.138]) by lists.oasis-open.org (Postfix) with ESMTP id AB076581912A for ; Tue, 27 Feb 2018 11:56:07 -0800 (PST) Date: Tue, 27 Feb 2018 21:56:04 +0200 From: "Michael S. Tsirkin" Message-ID: <20180227215553-mutt-send-email-mst@kernel.org> References: <61ea318df06f6e50c5f9cfffaaae85aa51ae5b58.1519045824.git.tgolembi@redhat.com> <20180220171544.GC12161@stefanha-x1.localdomain> <20180221001135.41bc13a1@fiorina> <20180221113328.GB19501@stefanha-x1.localdomain> <20180221184417.7d5bf2df@fiorina> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20180221184417.7d5bf2df@fiorina> Subject: Re: [virtio-dev] [PATCH] content: document balloon memory statistics To: =?utf-8?B?VG9tw6HFoSBHb2xlbWJpb3Zza8O9?= Cc: Stefan Hajnoczi , virtio-dev@lists.oasis-open.org, Jonathan Helman List-ID: On Wed, Feb 21, 2018 at 06:44:17PM +0100, Tomáš Golembiovský wrote: > On Wed, 21 Feb 2018 11:33:28 +0000 > Stefan Hajnoczi wrote: > > > On Wed, Feb 21, 2018 at 12:11:35AM +0100, Tomáš Golembiovský wrote: > > > On Tue, 20 Feb 2018 17:15:44 +0000 > > > Stefan Hajnoczi wrote: > > > > > > > On Mon, Feb 19, 2018 at 02:10:29PM +0100, Tomáš Golembiovský wrote: > > > > > +\item[VIRTIO_BALLOON_S_CACHES (7)] The amount of memory currently used for > > > > > + caching files and other data from disk (in bytes). > > > > > \end{description} > > > > > > > > This one is somewhat vague. I'm not sure if it means guest page cache > > > > specifically or something more general. > > > > > > > > On the other hand, the numbers tend to be OS specific... > > > > > > We should come up with a definition that is as definite as possible > > > while leaving room for all systems to substitute a value that is > > > natively available. So if anyone has a better formulation then please > > > advise. The original intent was not to create a Linux specific field. > > > > > > On Linux the value corresponds to Buffers + Cached + SwapCached memory > > > stats. Correct me if I'm wrong but that should be all clean pages that > > > have a counterpart on disk and can be quickly reclaimed and used for > > > something else (without additional IO). > > > > Thanks for clarifying. Based on what you posted, how about: > > > > "The amount of memory, in bytes, that can be quickly reclaimed without > > additional I/O. Typically these pages are used for caching files from > > disk." > > > > ? > > Sounds reasonable, thanks > > Tomas OK - will you post v2 then? > > > > > > On Windows this roughly corresponds to the standby list. Or maybe > > > standby list plus something else. I suppose there may be some > > > alternative on BSD too. > > > > > > Tomas > > > > > > > > > -- > > > Tomáš Golembiovský > > > -- > Tomáš Golembiovský --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org