Hi,
> buffer. I tried to put a dma_sync_sg_for_device() on virtio_gpu_object
> obj->pages-sgl
> before VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D is sent. This fixes the kernel
> console path.
That should be the right place.
> Once display manger is kicked off for example (sudo systemctl start
>
On Tue, 18 Sep 2018, Andy Lutomirski wrote:
> > On Sep 18, 2018, at 3:46 PM, Thomas Gleixner wrote:
> > On Tue, 18 Sep 2018, Andy Lutomirski wrote:
> >> Do we do better if we use signed arithmetic for the whole calculation?
> >> Then a small backwards movement would result in a small backwards res
> On Sep 18, 2018, at 3:46 PM, Thomas Gleixner wrote:
>
> On Tue, 18 Sep 2018, Andy Lutomirski wrote:
>>> On Sep 18, 2018, at 12:52 AM, Thomas Gleixner wrote:
>>>
> On Mon, 17 Sep 2018, John Stultz wrote:
> On Mon, Sep 17, 2018 at 12:25 PM, Andy Lutomirski wrote:
> Also, I'm not
On Tue, 18 Sep 2018, Andy Lutomirski wrote:
> > On Sep 18, 2018, at 12:52 AM, Thomas Gleixner wrote:
> >
> >> On Mon, 17 Sep 2018, John Stultz wrote:
> >>> On Mon, Sep 17, 2018 at 12:25 PM, Andy Lutomirski wrote:
> >>> Also, I'm not entirely convinced that this "last" thing is needed at
> >>> al
On Wed, 12 Sep 2018 16:02:02 +0200
Halil Pasic wrote:
> While ccw_io_helper() seems like intended to be exclusive in a sense that
> it is supposed to facilitate I/O for at most one thread at any given
> time, there is actually nothing ensuring that threads won't pile up at
> vcdev->wait_q. If the
On Wed, 12 Sep 2018 16:02:01 +0200
Halil Pasic wrote:
> Currently we have a race on vcdev->config in virtio_ccw_get_config() and
> in virtio_ccw_set_config().
>
> This normally does not cause problems, as these are usually infrequent
> operations. But occasionally sysfs attributes are directly d
On Tue, 18 Sep 2018, Thomas Gleixner wrote:
> So if the TSC on CPU1 is slightly behind the TSC on CPU0 then now1 can be
> smaller than cycle_last. The TSC sync stuff does not catch the small delta
> for unknown raisins. I'll go and find that machine and test that again.
Of course it does not trigg
> On Sep 18, 2018, at 12:52 AM, Thomas Gleixner wrote:
>
>> On Mon, 17 Sep 2018, John Stultz wrote:
>>> On Mon, Sep 17, 2018 at 12:25 PM, Andy Lutomirski wrote:
>>> Also, I'm not entirely convinced that this "last" thing is needed at
>>> all. John, what's the scenario under which we need it?
>
On Tue, Sep 18, 2018 at 03:23:08PM +0200, Thomas Gleixner wrote:
> On Tue, 18 Sep 2018, Peter Zijlstra wrote:
> > On Tue, Sep 18, 2018 at 12:41:57PM +0200, Thomas Gleixner wrote:
> > > I still have one of the machines which is affected by this.
> >
> > Are we sure this isn't a load vs rdtsc reorde
On Tue, 18 Sep 2018, Peter Zijlstra wrote:
> On Tue, Sep 18, 2018 at 12:41:57PM +0200, Thomas Gleixner wrote:
> > I still have one of the machines which is affected by this.
>
> Are we sure this isn't a load vs rdtsc reorder? Because if I look at the
> current code:
The load order of last vs. rdt
On Tue, Sep 18, 2018 at 12:41:57PM +0200, Thomas Gleixner wrote:
> On Tue, 18 Sep 2018, Thomas Gleixner wrote:
> > On Tue, 18 Sep 2018, Thomas Gleixner wrote:
> > > On Tue, 18 Sep 2018, Peter Zijlstra wrote:
> > > > > Your memory serves you right. That's indeed observable on CPUs which
> > > > > la
On Mon, Sep 17, 2018 at 11:38:34PM -0700, Nadav Amit wrote:
> This patch-set adds the following enhancements to the VMware balloon
> driver:
>
> 1. Balloon compaction support.
> 2. Report the number of inflated/deflated ballooned pages through vmstat.
> 3. Memory shrinker to avoid balloon over-inf
On Tue, 18 Sep 2018, Thomas Gleixner wrote:
> On Tue, 18 Sep 2018, Thomas Gleixner wrote:
> > On Tue, 18 Sep 2018, Peter Zijlstra wrote:
> > > > Your memory serves you right. That's indeed observable on CPUs which
> > > > lack TSC_ADJUST.
> > >
> > > But, if the gtod code can observe this, then wh
On Tue, 18 Sep 2018, Thomas Gleixner wrote:
> On Tue, 18 Sep 2018, Peter Zijlstra wrote:
> > > Your memory serves you right. That's indeed observable on CPUs which
> > > lack TSC_ADJUST.
> >
> > But, if the gtod code can observe this, then why doesn't the code that
> > checks the sync?
>
> Becaus
On Tue, 18 Sep 2018, Peter Zijlstra wrote:
> On Tue, Sep 18, 2018 at 09:52:26AM +0200, Thomas Gleixner wrote:
> > On Mon, 17 Sep 2018, John Stultz wrote:
> > > On Mon, Sep 17, 2018 at 12:25 PM, Andy Lutomirski wrote:
> > > > Also, I'm not entirely convinced that this "last" thing is needed at
> >
On Tue, Sep 18, 2018 at 09:52:26AM +0200, Thomas Gleixner wrote:
> On Mon, 17 Sep 2018, John Stultz wrote:
> > On Mon, Sep 17, 2018 at 12:25 PM, Andy Lutomirski wrote:
> > > Also, I'm not entirely convinced that this "last" thing is needed at
> > > all. John, what's the scenario under which we ne
On Mon, 17 Sep 2018, John Stultz wrote:
> On Mon, Sep 17, 2018 at 12:25 PM, Andy Lutomirski wrote:
> > Also, I'm not entirely convinced that this "last" thing is needed at
> > all. John, what's the scenario under which we need it?
>
> So my memory is probably a bit foggy, but I recall that as we
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