From: David Hildenbrand <david@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
willy@infradead.org, mhocko@kernel.org, linux-mm@kvack.org,
akpm@linux-foundation.org, mgorman@techsingularity.net,
vbabka@suse.cz, yang.zhang.wz@gmail.com, nitesh@redhat.com,
konrad.wilk@oracle.com, pagupta@redhat.com, riel@surriel.com,
lcapitulino@redhat.com, dave.hansen@intel.com,
wei.w.wang@intel.com, aarcange@redhat.com, pbonzini@redhat.com,
dan.j.williams@intel.com, alexander.h.duyck@linux.intel.com,
osalvador@suse.de
Subject: Re: [PATCH v16.1 6/9] virtio-balloon: Add support for providing free page reports to host
Date: Tue, 11 Feb 2020 16:13:46 +0100 [thread overview]
Message-ID: <314cb54e-8dfc-7606-7135-c21dbf416505@redhat.com> (raw)
In-Reply-To: <20200211094357-mutt-send-email-mst@kernel.org>
>> AFAIKs, the guest could inflate/deflate (esp. temporarily) and
>> communicate via "actual" the actual balloon size as he sees it.
>
> OK so you want hinted but unused pages counted, and reported
> in "actual"? That's a vmexit before each page use ...
No, not at all. I rather meant, that it is unclear how
inflation/deflation requests and "actual" *could* interact. Especially
if we would consider free page reporting as some way of inflation
(+immediate deflation) triggered by the guest. IMHO, we would not touch
"actual" in that case.
But as I said, I am totally fine with keeping it as is in this patch.
IOW not glue free page reporting to inflation/deflation but let it act
like something different with its own semantics (and document these
properly).
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2020-02-11 15:16 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 17:43 [PATCH v16.1 0/9] mm / virtio: Provide support for free page reporting Alexander Duyck
2020-01-22 17:43 ` [PATCH v16.1 1/9] mm: Adjust shuffle code to allow for future coalescing Alexander Duyck
2020-01-22 17:43 ` [PATCH v16.1 2/9] mm: Use zone and order instead of free area in free_list manipulators Alexander Duyck
2020-01-22 17:43 ` [PATCH v16.1 3/9] mm: Add function __putback_isolated_page Alexander Duyck
2020-01-22 17:43 ` [PATCH v16.1 4/9] mm: Introduce Reported pages Alexander Duyck
2020-01-22 17:43 ` [PATCH v16.1 5/9] virtio-balloon: Pull page poisoning config out of free page hinting Alexander Duyck
2020-01-22 17:43 ` [PATCH v16.1 6/9] virtio-balloon: Add support for providing free page reports to host Alexander Duyck
2020-02-11 11:03 ` David Hildenbrand
2020-02-11 11:47 ` Michael S. Tsirkin
2020-02-11 12:19 ` David Hildenbrand
2020-02-11 14:07 ` Michael S. Tsirkin
2020-02-11 14:31 ` David Hildenbrand
2020-02-11 14:48 ` Michael S. Tsirkin
2020-02-11 15:13 ` David Hildenbrand [this message]
2020-02-11 16:33 ` Alexander Duyck
2020-02-11 17:04 ` David Hildenbrand
2020-01-22 17:43 ` [PATCH v16.1 7/9] mm/page_reporting: Rotate reported pages to the tail of the list Alexander Duyck
2020-01-22 17:43 ` [PATCH v16.1 8/9] mm/page_reporting: Add budget limit on how many pages can be reported per pass Alexander Duyck
2020-01-22 17:44 ` [PATCH v16.1 9/9] mm/page_reporting: Add free page reporting documentation Alexander Duyck
2020-01-23 10:20 ` [PATCH v16.1 0/9] mm / virtio: Provide support for free page reporting Alexander Graf
2020-01-23 14:05 ` David Hildenbrand
2020-01-23 14:52 ` Alexander Graf
2020-01-24 13:25 ` David Hildenbrand
2020-01-24 16:20 ` David Hildenbrand
2020-01-23 16:26 ` Alexander Duyck
2020-01-23 16:54 ` Alexander Graf
2020-01-23 18:33 ` Alexander Duyck
2020-01-23 18:47 ` Graf (AWS), Alexander
2020-01-23 22:05 ` Alexander Duyck
2020-01-23 17:20 ` Dave Hansen
2020-01-23 19:23 ` Konrad Rzeszutek Wilk
2020-01-23 19:17 ` Johannes Weiner
2020-01-23 22:29 ` Alexander Duyck
2020-01-23 23:24 ` Dave Hansen
2020-01-24 13:23 ` Hillf Danton
2020-01-24 16:40 ` Alexander Graf
2020-01-25 2:01 ` Hillf Danton
2020-02-03 22:05 ` Alexander Duyck
2020-02-10 19:18 ` Should I repost? (was: Re: [PATCH v16.1 0/9] mm / virtio: Provide support for free page reporting) Alexander Duyck
2020-02-11 10:40 ` Mel Gorman
2020-02-11 22:57 ` Alexander Duyck
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