From: David Hildenbrand <david@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rik van Riel <riel@redhat.com>,
Dave Hansen <dave.hansen@intel.com>,
Wei Wang <wei.w.wang@intel.com>,
linux-kernel@vger.kernel.org, qemu-devel@nongnu.org,
virtualization@lists.linux-foundation.org, kvm@vger.kernel.org,
linux-mm@kvack.org, cornelia.huck@de.ibm.com,
akpm@linux-foundation.org, mgorman@techsingularity.net,
aarcange@redhat.com, amit.shah@redhat.com, pbonzini@redhat.com,
liliang.opensource@gmail.com,
Nitesh Narayan Lal <nilal@redhat.com>
Subject: Re: [PATCH v11 4/6] mm: function to offer a page block on the free list
Date: Tue, 20 Jun 2017 21:01:58 +0200 [thread overview]
Message-ID: <338ec5ce-759b-6381-0442-ac0741f159b8@redhat.com> (raw)
In-Reply-To: <20170620215552-mutt-send-email-mst@kernel.org>
>> IMHO even simply writing all-zeros to all free pages before starting
>> migration (or even when freeing a page) would be a cleaner interface
>> than this (because it atomically works with the entity the host cares
>> about for migration). But yes, performance is horrible that's why I am
>> not even suggesting it. Just saying that this mm interface is very very
>> special and if we could find something better, I'd favor it.
>
> As long as there's a single user, changing to a better interface
> once it's found won't be hard at all :)
>
Hehe, more like "we made this beautiful virtio-balloon extension" - oh
there is free page hinting (assuming that it does not reuse the batch
interface here). Guess how long it would take to at least show that free
page hinting can be done. If it takes another 6 years, I am totally on
your side ;)
--
Thanks,
David
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next prev parent reply other threads:[~2017-06-20 19:02 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-09 10:41 [PATCH v11 0/6] Virtio-balloon Enhancement Wei Wang
2017-06-09 10:41 ` [PATCH v11 1/6] virtio-balloon: deflate via a page list Wei Wang
2017-06-09 10:41 ` [PATCH v11 2/6] virtio-balloon: coding format cleanup Wei Wang
2017-06-09 10:41 ` [PATCH v11 3/6] virtio-balloon: VIRTIO_BALLOON_F_PAGE_CHUNKS Wei Wang
2017-06-13 17:56 ` Michael S. Tsirkin
2017-06-13 17:59 ` Dave Hansen
2017-06-13 18:55 ` Michael S. Tsirkin
2017-06-15 8:10 ` [virtio-dev] " Wei Wang
2017-06-16 3:19 ` Michael S. Tsirkin
2017-06-28 15:04 ` Matthew Wilcox
2017-07-12 13:05 ` Wei Wang
2017-06-09 10:41 ` [PATCH v11 4/6] mm: function to offer a page block on the free list Wei Wang
2017-06-12 14:10 ` Dave Hansen
2017-06-12 16:28 ` Michael S. Tsirkin
2017-06-12 16:42 ` Dave Hansen
2017-06-12 20:34 ` Michael S. Tsirkin
2017-06-12 20:54 ` Dave Hansen
2017-06-13 2:56 ` Wei Wang
2017-06-20 16:44 ` Rik van Riel
2017-06-20 16:49 ` David Hildenbrand
2017-06-20 17:29 ` Rik van Riel
2017-06-20 18:26 ` Michael S. Tsirkin
2017-06-20 19:51 ` Rik van Riel
2017-06-21 12:41 ` Michael S. Tsirkin
2017-06-21 8:38 ` [Qemu-devel] " Wei Wang
2017-06-20 18:17 ` Michael S. Tsirkin
2017-06-20 18:54 ` David Hildenbrand
2017-06-20 18:56 ` Michael S. Tsirkin
2017-06-20 19:01 ` David Hildenbrand [this message]
2017-06-21 12:56 ` Christian Borntraeger
2017-06-21 13:47 ` David Hildenbrand
2017-06-09 10:41 ` [PATCH v11 5/6] mm: export symbol of next_zone and first_online_pgdat Wei Wang
2017-06-09 10:41 ` [PATCH v11 6/6] virtio-balloon: VIRTIO_BALLOON_F_CMD_VQ Wei Wang
2017-06-12 14:07 ` Dave Hansen
2017-06-13 10:17 ` Wei Wang
2017-06-20 16:18 ` Michael S. Tsirkin
2017-06-21 3:28 ` [virtio-dev] " Wei Wang
2017-06-21 12:28 ` Michael S. Tsirkin
2017-06-22 8:40 ` Wei Wang
2017-06-28 15:01 ` Michael S. Tsirkin
2017-07-12 12:57 ` Wei Wang
2017-06-09 11:18 ` [PATCH v11 0/6] Virtio-balloon Enhancement Wang, Wei W
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