[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]
Subject: Re: [virtio-dev] [PATCH] content: document balloon memory statistics
On Tue, 20 Feb 2018 17:15:44 +0000 Stefan Hajnoczi <stefanha@redhat.com> 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). 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 <tgolembi@redhat.com>
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]