On 28.12.2018 03:26, Wei Wang wrote:
> Some vqs don't need to be allocated when the related feature bits are
> disabled. Callers notice the vq allocation layer by setting the related
> names[i] to be NULL.
>
> This patch series fixes the find_vqs implementations to handle this case.
So the
Use one generic vhost_copy_to_user() instead of two dedicated
accessor. This will simplify the conversion to fine grain
accessors. About 2% improvement of PPS were seen during vitio-user
txonly test.
Signed-off-by: Jason Wang
---
drivers/vhost/vhost.c | 11 +--
1 file changed, 1
This is used to hide the metadata address from virtqueue helpers. This
will allow to implement a vmap based fast accessing to metadata.
Signed-off-by: Jason Wang
---
drivers/vhost/vhost.c | 94 +++
1 file changed, 77 insertions(+), 17 deletions(-)
diff
It was noticed that the copy_user() friends that was used to access
virtqueue metdata tends to be very expensive for dataplane
implementation like vhost since it involves lots of software checks,
speculation barrier, hardware feature toggling (e.g SMAP). The
extra cost will be more obvious when
Hi:
This series tries to access virtqueue metadata through kernel virtual
address instead of copy_user() friends since they had too much
overheads like checks, spec barriers or even hardware feature
toggling.
Test shows about 24% improvement on TX PPS. It should benefit other
cases as well.
On 12/27/2018 08:17 PM, Christian Borntraeger wrote:
On 27.12.2018 12:59, Christian Borntraeger wrote:
On 27.12.2018 12:31, Christian Borntraeger wrote:
This patch triggers random crashes in the guest kernel on s390 early during
boot.
No migration and no setting of the balloon is involved.
On 12/27/2018 08:03 PM, Christian Borntraeger wrote:
On 27.08.2018 03:32, Wei Wang wrote:
static int init_vqs(struct virtio_balloon *vb)
{
- struct virtqueue *vqs[3];
- vq_callback_t *callbacks[] = { balloon_ack, balloon_ack, stats_request
};
- static const char * const
Some vqs may not need to be allocated when their related feature bits
are disabled. So callers may pass in such vqs with "names = NULL".
Then we skip such vq allocations.
Signed-off-by: Wei Wang
---
drivers/misc/mic/vop/vop_main.c| 9 +++--
drivers/remoteproc/remoteproc_virtio.c |
When find_vqs, there will be no vq[i] allocation if its corresponding
names[i] is NULL. For example, the caller may pass in names[i] (i=4)
with names[2] being NULL because the related feature bit is turned off,
so technically there are 3 queues on the device, and name[4] should
correspond to the
Some vqs don't need to be allocated when the related feature bits are
disabled. Callers notice the vq allocation layer by setting the related
names[i] to be NULL.
This patch series fixes the find_vqs implementations to handle this case.
Wei Wang (2):
virtio_pci: use queue idx instead of array
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Proceedings will be submitted for
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On 27.12.2018 12:59, Christian Borntraeger wrote:
> On 27.12.2018 12:31, Christian Borntraeger wrote:
>> This patch triggers random crashes in the guest kernel on s390 early during
>> boot.
>> No migration and no setting of the balloon is involved.
>>
>
> Adding Conny and Halil,
>
> As the
On 27.08.2018 03:32, Wei Wang wrote:
> static int init_vqs(struct virtio_balloon *vb)
> {
> - struct virtqueue *vqs[3];
> - vq_callback_t *callbacks[] = { balloon_ack, balloon_ack, stats_request
> };
> - static const char * const names[] = { "inflate", "deflate", "stats" };
> -
On 27.12.2018 12:31, Christian Borntraeger wrote:
> This patch triggers random crashes in the guest kernel on s390 early during
> boot.
> No migration and no setting of the balloon is involved.
>
Adding Conny and Halil,
As the QEMU provides no PAGE_HINT feature yet, this quick hack makes the
This patch triggers random crashes in the guest kernel on s390 early during
boot.
No migration and no setting of the balloon is involved.
On 27.08.2018 03:32, Wei Wang wrote:
> The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this
> series enables the virtio-balloon driver to
On 2018/12/26 下午11:22, Michael S. Tsirkin wrote:
On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote:
On 2018/12/6 上午6:54, Michael S. Tsirkin wrote:
When use_napi is set, let's enable BQLs. Note: some of the issues are
similar to wifi. It's worth considering whether something similar
On 2018/12/26 下午11:19, Michael S. Tsirkin wrote:
On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote:
On 2018/12/6 上午6:54, Michael S. Tsirkin wrote:
When use_napi is set, let's enable BQLs. Note: some of the issues are
similar to wifi. It's worth considering whether something similar
On 2018/12/26 下午11:15, Michael S. Tsirkin wrote:
On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote:
On 2018/12/6 上午6:54, Michael S. Tsirkin wrote:
When use_napi is set, let's enable BQLs. Note: some of the issues are
similar to wifi. It's worth considering whether something similar
On 2018/12/26 下午11:02, Michael S. Tsirkin wrote:
On Wed, Dec 26, 2018 at 11:57:32AM +0800, Jason Wang wrote:
On 2018/12/25 下午8:50, Michael S. Tsirkin wrote:
On Tue, Dec 25, 2018 at 06:05:25PM +0800, Jason Wang wrote:
On 2018/12/25 上午2:10, Michael S. Tsirkin wrote:
On Mon, Dec 24, 2018 at
On 2018/12/26 下午9:46, Michael S. Tsirkin wrote:
On Wed, Dec 26, 2018 at 01:43:26PM +0800, Jason Wang wrote:
On 2018/12/26 上午12:25, Michael S. Tsirkin wrote:
On Tue, Dec 25, 2018 at 05:43:25PM +0800, Jason Wang wrote:
On 2018/12/25 上午1:41, Michael S. Tsirkin wrote:
On Mon, Dec 24, 2018 at
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