Messages in this thread | | | Date | Tue, 28 Oct 2014 23:56:15 +0400 | Subject | Re: [PATCH v3 1/4] mm/balloon_compaction: redesign ballooned pages management | From | Konstantin Khlebnikov <> |
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On Tue, Oct 28, 2014 at 9:47 PM, Matt Mullins <mmullins@mmlx.us> wrote: > On Sat, Sep 27, 2014 at 11:15:16PM +0400, Konstantin Khlebnikov wrote: >> This patch fixes all of them. > > It seems to have rendered virtio_balloon completely ineffective without > CONFIG_COMPACTION and CONFIG_BALLOON_COMPACTION, even for the case that I'm > expanding the memory available to my VM.
What do you mean by ineffective?
That it cannot handle fragmentation? I saw that without compaction ballooning works even better: it allocates pages without GFP_MOVABLE and buddy allocator returns much less scattered pages.
> > Was this intended? Should Kconfig be updated so that VIRTIO_BALLOON depends on > BALLOON_COMPACTION now?
Nope, this is independent feature.
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