Batch sending rx buffer can improve total bandwidth.
Signed-off-by: Yiwen Jiang
---
drivers/vhost/vsock.c | 24 +---
1 file changed, 17 insertions(+), 7 deletions(-)
diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
index 9600133..a4bf0a1 100644
---
Since VSOCK already support mergeable rx buffer, so it can
implement the balance with performance and guest memory,
we can increase the sent pkt len to improve performance.
And in order to be compatible with old version, so we still
send max default rx buf size once.
Signed-off-by: Yiwen Jiang
Guest receive mergeable rx buffer, it can merge
scatter rx buffer into a big buffer and then copy
to user space.
In addition, it also use iovec to replace buf in struct
virtio_vsock_pkt, keep tx and rx consistency. The only
difference is now tx still uses a segment of continuous
physical memory
From: Jason Wang
Date: Thu, 13 Dec 2018 10:53:36 +0800
> This series tries to fix various issues of vhost:
>
> - Patch 1 adds a missing write barrier between used idx updating and
> logging.
> - Patch 2-3 brings back the protection of device IOTLB through vq
> mutex, this fixes possible use
When vhost support VIRTIO_VSOCK_F_MRG_RXBUF feature,
it will merge big packet into rx vq.
Signed-off-by: Yiwen Jiang
---
drivers/vhost/vsock.c | 111 ++
include/linux/virtio_vsock.h | 1 +
include/uapi/linux/virtio_vsock.h | 5 ++
3 files
In driver probing, if virtio has VIRTIO_VSOCK_F_MRG_RXBUF feature,
it will fill mergeable rx buffer, support for host send mergeable
rx buffer. It will fill a fixed size(PAGE_SIZE) everytime to
compact with small packet and big packet.
In addition, it also add one optimizations copied from
On Wed, Dec 12, 2018 at 11:03:57AM +0800, Jason Wang wrote:
>
> On 2018/12/11 下午12:04, Michael S. Tsirkin wrote:
> > On Tue, Dec 11, 2018 at 11:06:43AM +0800, Jason Wang wrote:
> > > On 2018/12/11 上午9:34, Michael S. Tsirkin wrote:
> > > > On Mon, Dec 10, 2018 at 05:44:52PM +0800, Jason Wang
On 2018/12/11 下午12:04, Michael S. Tsirkin wrote:
On Tue, Dec 11, 2018 at 11:06:43AM +0800, Jason Wang wrote:
On 2018/12/11 上午9:34, Michael S. Tsirkin wrote:
On Mon, Dec 10, 2018 at 05:44:52PM +0800, Jason Wang wrote:
When we try to do rx busy polling in tx path in commit 441abde4cd84
("net:
On Tue, Dec 11, 2018 at 10:31:01AM -0800, Christoph Hellwig wrote:
> On Tue, Dec 11, 2018 at 06:20:57PM +, Jean-Philippe Brucker wrote:
> > Implement the virtio-iommu driver, following specification v0.9 [1].
> >
> > Only minor changes since v5 [2]. I fixed issues reported by Michael and
> >
On 11/12/2018 18:31, Christoph Hellwig wrote:
> On Tue, Dec 11, 2018 at 06:20:57PM +, Jean-Philippe Brucker wrote:
>> Implement the virtio-iommu driver, following specification v0.9 [1].
>>
>> Only minor changes since v5 [2]. I fixed issues reported by Michael and
>> added tags from Eric and
On Tue, Dec 11, 2018 at 06:20:57PM +, Jean-Philippe Brucker wrote:
> Implement the virtio-iommu driver, following specification v0.9 [1].
>
> Only minor changes since v5 [2]. I fixed issues reported by Michael and
> added tags from Eric and Bharat. Thanks!
>
> You can find Linux driver and
Now vsock only support send/receive small packet, it can't achieve
high performance. As previous discussed with Jason Wang, I revisit the
idea of vhost-net about mergeable rx buffer and implement the mergeable
rx buffer in vhost-vsock, it can allow big packet to be scattered in
into different
The event queue offers a way for the device to report access faults from
endpoints. It is implemented on virtqueue #1. Whenever the host needs to
signal a fault, it fills one of the buffers offered by the guest and
interrupts it.
Tested-by: Bharat Bhushan
Tested-by: Eric Auger
Reviewed-by: Eric
When the device offers the probe feature, send a probe request for each
device managed by the IOMMU. Extract RESV_MEM information. When we
encounter a MSI doorbell region, set it up as a IOMMU_RESV_MSI region.
This will tell other subsystems that there is no need to map the MSI
doorbell in the
The virtio IOMMU is a para-virtualized device, allowing to send IOMMU
requests such as map/unmap over virtio transport without emulating page
tables. This implementation handles ATTACH, DETACH, MAP and UNMAP
requests.
The bulk of the code transforms calls coming from the IOMMU API into
For PCI devices that have an OF node, set the fwnode as well. This way
drivers that rely on fwnode don't need the special case described by
commit f94277af03ea ("of/platform: Initialise dev->fwnode appropriately").
Acked-by: Bjorn Helgaas
Signed-off-by: Jean-Philippe Brucker
---
In PCI root complex nodes, the iommu-map property describes the IOMMU that
translates each endpoint. On some platforms, the IOMMU itself is presented
as a PCI endpoint (e.g. AMD IOMMU and virtio-iommu). This isn't supported
by the current OF driver, which expects all endpoints to have an IOMMU.
Some systems implement virtio-iommu as a PCI endpoint. The operating
system needs to discover the relationship between IOMMU and masters long
before the PCI endpoint gets probed. Add a PCI child node to describe the
virtio-iommu device.
The virtio-pci-iommu is conceptually split between a PCI
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