On Thu, Jul 20, 2023 at 01:26:20PM -0700, Shannon Nelson wrote:
> On 7/20/23 1:38 AM, Jason Wang wrote:
> >
> > Adding cond_resched() to the command waiting loop for a better
> > co-operation with the scheduler. This allows to give CPU a breath to
> > run other task(workqueue) instead of busy loop
On Thu, Jul 20, 2023 at 08:31:13AM -0700, Shannon Nelson wrote:
> On 7/20/23 1:38 AM, Jason Wang wrote:
> >
> > Adding cond_resched() to the command waiting loop for a better
> > co-operation with the scheduler. This allows to give CPU a breath to
> > run other task(workqueue) instead of busy loop
On 7/20/23 1:38 AM, Jason Wang wrote:
Adding cond_resched() to the command waiting loop for a better
co-operation with the scheduler. This allows to give CPU a breath to
run other task(workqueue) instead of busy looping when preemption is
not allowed on a device whose CVQ might be slow.
Signed-
On 7/20/23 1:38 AM, Jason Wang wrote:
This patch convert rx mode setting to be done in a workqueue, this is
a must for allow to sleep when waiting for the cvq command to
response since current code is executed under addr spin lock.
Note that we need to disable and flush the workqueue during fre
On Wed, Jul 19, 2023 at 11:22:42PM -0700, Christoph Hellwig wrote:
> On Thu, Jul 13, 2023 at 10:51:59AM -0400, Michael S. Tsirkin wrote:
> > On Thu, Jul 13, 2023 at 04:15:16AM -0700, Christoph Hellwig wrote:
> > > On Mon, Jul 10, 2023 at 11:42:32AM +0800, Xuan Zhuo wrote:
> > > > Added virtqueue_dm
On Thu, Jul 20, 2023 at 10:27:04AM +0800, Jason Wang wrote:
> On Wed, Jul 19, 2023 at 11:46 PM Feng Liu wrote:
> >
> > The 'is_legacy' flag is used to differentiate between legacy vs modern
> > device. Currently, it is based on the value of vp_dev->ldev.ioaddr.
> > However, due to the shared memor
On 2023-07-19 p.m.10:27, Jason Wang wrote:
External email: Use caution opening links or attachments
On Wed, Jul 19, 2023 at 11:46 PM Feng Liu wrote:
The 'is_legacy' flag is used to differentiate between legacy vs modern
device. Currently, it is based on the value of vp_dev->ldev.ioaddr.
Ho
On 7/20/23 1:38 AM, Jason Wang wrote:
Adding cond_resched() to the command waiting loop for a better
co-operation with the scheduler. This allows to give CPU a breath to
run other task(workqueue) instead of busy looping when preemption is
not allowed on a device whose CVQ might be slow.
Signed-
On Thu, Feb 02, 2023 at 05:25:17PM -0600, Mike Christie wrote:
> For vhost workers we use the kthread API which inherit's its values from
> and checks against the kthreadd thread. This results in the wrong RLIMITs
> being checked, so while tools like libvirt try to control the number of
> threads b
Adding cond_resched() to the command waiting loop for a better
co-operation with the scheduler. This allows to give CPU a breath to
run other task(workqueue) instead of busy looping when preemption is
not allowed on a device whose CVQ might be slow.
Signed-off-by: Jason Wang
---
drivers/net/virt
This patch convert rx mode setting to be done in a workqueue, this is
a must for allow to sleep when waiting for the cvq command to
response since current code is executed under addr spin lock.
Note that we need to disable and flush the workqueue during freeze,
this means the rx mode setting is lo
Hi all:
The code used to busy poll for cvq command which turns out to have
several side effects:
1) infinite poll for buggy devices
2) bad interaction with scheduler
So this series tries to use cond_resched() in the waiting loop. Before
doing this we need first make sure the cvq command is not e
On Thu, Jul 20, 2023 at 03:41:56PM +0800, Jason Wang wrote:
> > Did you actually check that it works though?
> > Looks like with swiotlb you need to synch to trigger a copy
> > before unmap, and I don't see where it's done in the current
> > patch.
>
> And this is needed for XDP_REDIRECT as well.
On Thu, Jul 20, 2023 at 2:23 PM Christoph Hellwig wrote:
>
> Hi Jason,
>
> can you please resend your reply with proper quoting? I had to give
> up after multiple pages of scrolling without finding anything that
> you added to the full quote.
I guess it's this part?
> > > You should also test w
On Wed, 19 Jul 2023 23:57:51 -0700, Christoph Hellwig
wrote:
> On Thu, Jul 20, 2023 at 02:45:14PM +0800, Xuan Zhuo wrote:
> > virtqueue_dma_dev() return the device that working with the DMA APIs.
> > Then that can be used like other devices. So what is the problem.
> >
> > I always think the c
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