Hi Stefan,
>
> On Tue, Nov 29, 2016 at 08:48:14PM +0800, Gonglei wrote:
> > diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c
> b/drivers/crypto/virtio/virtio_crypto_algs.c
> > new file mode 100644
> > index 000..08b077f
> > --- /dev/null
> > +++
On 11/30/2016 12:43 AM, Liang Li wrote:
> +static void send_unused_pages_info(struct virtio_balloon *vb,
> + unsigned long req_id)
> +{
> + struct scatterlist sg_in;
> + unsigned long pos = 0;
> + struct virtqueue *vq = vb->req_vq;
> + struct
-
WORKSHOPS
WorldCIST'17 - 5th World Conference on Information Systems and Technologies
Porto Santo Island, Madeira, Portugal
11th-13th of April 2017
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On Tue, Nov 29, 2016 at 08:48:14PM +0800, Gonglei wrote:
> diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c
> b/drivers/crypto/virtio/virtio_crypto_algs.c
> new file mode 100644
> index 000..08b077f
> --- /dev/null
> +++ b/drivers/crypto/virtio/virtio_crypto_algs.c
> @@ -0,0 +1,518 @@
This patch contains two parts:
One is to add a new API to mm go get the unused page information.
The virtio balloon driver will use this new API added to get the
unused page info and send it to hypervisor(QEMU) to speed up live
migration. During sending the bitmap, some the pages may be modified
The implementation of the current virtio-balloon is not very
efficient, the time spends on different stages of inflating
the balloon to 7GB of a 8GB idle guest:
a. allocating pages (6.5%)
b. sending PFNs to host (68.3%)
c. address translation (6.1%)
d. madvise (19%)
It takes about 4126ms for the
Define the flags and head struct for a new host request virtual
queue. Guest can get requests from host and then responds to them on
this new virtual queue.
Host can make use of this virtual queue to request the guest do some
operations, e.g. drop page cache, synchronize file system, etc.
And the
Add a new feature which supports sending the page information with
a bitmap. The current implementation uses PFNs array, which is not
very efficient. Using bitmap can improve the performance of
inflating/deflating significantly
The page bitmap header will used to tell the host some information
This patch set contains two parts of changes to the virtio-balloon.
One is the change for speeding up the inflating & deflating process,
the main idea of this optimization is to use bitmap to send the page
information to host instead of the PFNs, to reduce the overhead of
virtio data
When doing the inflating/deflating operation, the current virtio-balloon
implementation uses an array to save 256 PFNS, then send these PFNS to
host through virtio and process each PFN one by one. This way is not
efficient when inflating/deflating a large mount of memory because too
many times of
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