Re: [PATCH v9 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration

On Thu, Apr 13, 2017 at 05:35:03PM +0800, Wei Wang wrote: > 2) transfer the guest unused pages to the host so that they > can be skipped to migrate in live migration. I don't understand this second bit. You leave the pages on the free list, and tell the host they're free. What's preventing

Re: [PATCH v9 3/5] mm: function to offer a page block on the free list

On Thu, 13 Apr 2017 17:35:06 +0800 Wei Wang wrote: > Add a function to find a page block on the free list specified by the > caller. Pages from the page block may be used immediately after the > function returns. The caller is responsible for detecting or preventing > the

RE: [RFC 0/3] virtio-iommu: a paravirtualized IOMMU

> From: Jean-Philippe Brucker > Sent: Saturday, April 8, 2017 3:18 AM > > This is the initial proposal for a paravirtualized IOMMU device using > virtio transport. It contains a description of the device, a Linux driver, > and a toy implementation in kvmtool. With this prototype, you can >

[PATCH v2 00/11] x86: xen cpuid() cleanup

Reduce special casing of xen_cpuid() by using cpu capabilities instead of faked cpuid nodes. This cleanup enables us remove the hypervisor specific set_cpu_features callback as the same effect can be reached via setup_[clear|force]_cpu_cap(). Removing the rest faked nodes from xen_cpuid()

[PATCH v2 10/11] vmware: set cpu capabilities during platform initialization

There is no need to set the same capabilities for each cpu individually. This can be done for all cpus in platform initialization. Cc: Alok Kataria Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc:

RE: [RFC 0/3] virtio-iommu: a paravirtualized IOMMU

> From: Jason Wang > Sent: Wednesday, April 12, 2017 5:07 PM > > On 2017年04月08日 03:17, Jean-Philippe Brucker wrote: > > This is the initial proposal for a paravirtualized IOMMU device using > > virtio transport. It contains a description of the device, a Linux driver, > > and a toy implementation

[PATCH v9 2/5] virtio-balloon: VIRTIO_BALLOON_F_BALLOON_CHUNKS

Add a new feature, VIRTIO_BALLOON_F_BALLOON_CHUNKS, which enables the transfer of the ballooned (i.e. inflated/deflated) pages in chunks to the host. The implementation of the previous virtio-balloon is not very efficient, because the ballooned pages are transferred to the host one by one. Here

[PATCH v9 3/5] mm: function to offer a page block on the free list

Add a function to find a page block on the free list specified by the caller. Pages from the page block may be used immediately after the function returns. The caller is responsible for detecting or preventing the use of such pages. Signed-off-by: Wei Wang Signed-off-by:

[PATCH v9 4/5] mm: export symbol of next_zone and first_online_pgdat

This patch enables for_each_zone()/for_each_populated_zone() to be invoked by a kernel module. Signed-off-by: Wei Wang --- mm/mmzone.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/mmzone.c b/mm/mmzone.c index 5652be8..e14b7ec 100644 --- a/mm/mmzone.c +++

[PATCH v9 5/5] virtio-balloon: VIRTIO_BALLOON_F_MISC_VQ

Add a new vq, miscq, to handle miscellaneous requests between the device and the driver. This patch implemnts the VIRTIO_BALLOON_MISCQ_INQUIRE_UNUSED_PAGES request sent from the device. Upon receiving this request from the miscq, the driver offers to the device the guest unused pages. Tests have

[PATCH v9 1/5] virtio-balloon: deflate via a page list

From: Liang Li This patch saves the deflated pages to a list, instead of the PFN array. Accordingly, the balloon_pfn_to_page() function is removed. Signed-off-by: Liang Li Signed-off-by: Michael S. Tsirkin Signed-off-by: Wei Wang

[PATCH v9 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration

This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Changes: v8->v9: 1) Split the two new features, VIRTIO_BALLOON_F_BALLOON_CHUNKS and

Re: [PATCH v2 10/11] vmware: set cpu capabilities during platform initialization

On Thu, 2017-04-13 at 12:11 +0200, Juergen Gross wrote: > There is no need to set the same capabilities for each cpu > individually. This can be done for all cpus in platform initialization. Looks reasonable to me. Acked-by: Alok Kataria Thanks, Alok > > Cc: Alok Kataria

Re: [PATCH v9 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration

On Thu, Apr 13, 2017 at 01:44:11PM -0700, Matthew Wilcox wrote: > On Thu, Apr 13, 2017 at 05:35:03PM +0800, Wei Wang wrote: > > 2) transfer the guest unused pages to the host so that they > > can be skipped to migrate in live migration. > > I don't understand this second bit. You leave the pages

Re: [PATCH v2 00/11] x86: xen cpuid() cleanup

On 04/13/2017 06:11 AM, Juergen Gross wrote: > Reduce special casing of xen_cpuid() by using cpu capabilities instead > of faked cpuid nodes. > > This cleanup enables us remove the hypervisor specific set_cpu_features > callback as the same effect can be reached via >

Re: [RFC 0/3] virtio-iommu: a paravirtualized IOMMU

On 13/04/17 09:41, Tian, Kevin wrote: >> From: Jean-Philippe Brucker >> Sent: Saturday, April 8, 2017 3:18 AM >> >> This is the initial proposal for a paravirtualized IOMMU device using >> virtio transport. It contains a description of the device, a Linux driver, >> and a toy implementation in

Re: [RFC 0/3] virtio-iommu: a paravirtualized IOMMU

On 13/04/17 09:16, Tian, Kevin wrote: >> From: Jason Wang >> Sent: Wednesday, April 12, 2017 5:07 PM >> >> On 2017年04月08日 03:17, Jean-Philippe Brucker wrote: >>> This is the initial proposal for a paravirtualized IOMMU device using >>> virtio transport. It contains a description of the device, a

Re: [PATCH v9 3/5] mm: function to offer a page block on the free list

On 04/14/2017 04:02 AM, Andrew Morton wrote: On Thu, 13 Apr 2017 17:35:06 +0800 Wei Wang wrote: Add a function to find a page block on the free list specified by the caller. Pages from the page block may be used immediately after the function returns. The caller is

repost: af_packet vs virtio (was packed ring layout proposal v2)

On Fri, Apr 14, 2017 at 05:42:58AM +0300, Michael S. Tsirkin wrote: > Hi all, I wanted to raise the question of similarities between virtio > and new zero copy af_packet interfaces. > > First I would like to mention that virtio device development isn't spec > limited - spec is there to help

Re: [PATCH v9 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration

On 04/14/2017 09:50 AM, Michael S. Tsirkin wrote: On Thu, Apr 13, 2017 at 01:44:11PM -0700, Matthew Wilcox wrote: On Thu, Apr 13, 2017 at 05:35:03PM +0800, Wei Wang wrote: 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. I don't

Re: [PATCH v9 3/5] mm: function to offer a page block on the free list

On Fri, Apr 14, 2017 at 10:30:27AM +0800, Wei Wang wrote: > OK. What do you think if we add this: > > #if defined(CONFIG_VIRTIO_BALLOON) || defined(CONFIG_VIRTIO_BALLOON_MODULE) That's spelled "IS_ENABLED(CONFIG_VIRTIO_BALLOON)", FYI. ___

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SUBMISSION DEADLINE 14th International Joint Conference on e-Business and Telecommunications Submission Deadline: April 18, 2017 http://www.icete.org/ July 24 - 26, 2017 Madrid, Spain. Technically Co-sponsored by IEEE Systems Council. In Cooperation with ITG, ACM SIGMM, ACM SIGMIS,

Re: [PATCH kernel v8 3/4] mm: add inerface to offer info about unused pages

On 03/17/2017 05:28 AM, Andrew Morton wrote: On Thu, 16 Mar 2017 15:08:46 +0800 Wei Wang wrote: From: Liang Li This patch adds a function to provides a snapshot of the present system unused pages. An important usage of this function is to provide

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Re: [PATCH v9 2/5] virtio-balloon: VIRTIO_BALLOON_F_BALLOON_CHUNKS

On Thu, Apr 13, 2017 at 07:34:19PM +0300, Michael S. Tsirkin wrote: > So we don't need the bitmap to talk to host, it is just > a data structure we chose to maintain lists of pages, right? > OK as far as it goes but you need much better isolation for it. > Build a data structure with APIs such as

Re: [PATCH v9 5/5] virtio-balloon: VIRTIO_BALLOON_F_MISC_VQ

On Thu, Apr 13, 2017 at 05:35:08PM +0800, Wei Wang wrote: > Add a new vq, miscq, to handle miscellaneous requests between the device > and the driver. > > This patch implemnts the VIRTIO_BALLOON_MISCQ_INQUIRE_UNUSED_PAGES implements > request sent from the device. Commands are sent from host

Re: [PATCH v9 2/5] virtio-balloon: VIRTIO_BALLOON_F_BALLOON_CHUNKS

On Thu, Apr 13, 2017 at 05:35:05PM +0800, Wei Wang wrote: > Add a new feature, VIRTIO_BALLOON_F_BALLOON_CHUNKS, which enables Let's find a better name here. VIRTIO_BALLOON_F_PAGE_CHUNK > the transfer of the ballooned (i.e. inflated/deflated) pages in > chunks to the host. > > The