linux-kernel - Re: [RESEND PATCH v3 kernel 1/7] virtio-balloon: rework deflate to add page to a list

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Message-ID: <580E3ACD.1080906@intel.com>
Date:   Mon, 24 Oct 2016 09:46:05 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Liang Li <liang.z.li@...el.com>, mst@...hat.com
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, linux-mm@...ck.org,
        virtio-dev@...ts.oasis-open.org, kvm@...r.kernel.org,
        qemu-devel@...gnu.org, quintela@...hat.com, dgilbert@...hat.com,
        pbonzini@...hat.com, cornelia.huck@...ibm.com, amit.shah@...hat.com
Subject: Re: [RESEND PATCH v3 kernel 1/7] virtio-balloon: rework deflate to
 add page to a list

On 10/20/2016 11:24 PM, Liang Li wrote:
> Will allow faster notifications using a bitmap down the road.
> balloon_pfn_to_page() can be removed because it's useless.

This is a pretty terse description of what's going on here.  Could you
try to elaborate a bit?  What *is* the current approach?  Why does it
not work going forward?  What do you propose instead?  Why is it better?