Am 11.03.21 um 14:17 schrieb Daniel Vetter:
[SNIP]
So I did the following quick experiment on vmwgfx, and it turns out that
with it,
fast gup never succeeds. Without the "| PFN_MAP", it typically succeeds
I should probably craft an RFC formalizing this.
Yeah I think that would be good.
On 3/11/21 2:17 PM, Daniel Vetter wrote:
On Thu, Mar 11, 2021 at 2:12 PM Thomas Hellström (Intel)
wrote:
Hi!
On 3/11/21 2:00 PM, Daniel Vetter wrote:
On Thu, Mar 11, 2021 at 11:22:06AM +0100, Thomas Hellström (Intel) wrote:
On 3/1/21 3:09 PM, Daniel Vetter wrote:
On Mon, Mar 1, 2021 at
On Thu, Mar 11, 2021 at 2:12 PM Thomas Hellström (Intel)
wrote:
>
> Hi!
>
> On 3/11/21 2:00 PM, Daniel Vetter wrote:
> > On Thu, Mar 11, 2021 at 11:22:06AM +0100, Thomas Hellström (Intel) wrote:
> >> On 3/1/21 3:09 PM, Daniel Vetter wrote:
> >>> On Mon, Mar 1, 2021 at 11:17 AM Christian König
>
Hi!
On 3/11/21 2:00 PM, Daniel Vetter wrote:
On Thu, Mar 11, 2021 at 11:22:06AM +0100, Thomas Hellström (Intel) wrote:
On 3/1/21 3:09 PM, Daniel Vetter wrote:
On Mon, Mar 1, 2021 at 11:17 AM Christian König
wrote:
Am 01.03.21 um 10:21 schrieb Thomas Hellström (Intel):
On 3/1/21 10:05 AM,
On Thu, Mar 11, 2021 at 11:22:06AM +0100, Thomas Hellström (Intel) wrote:
>
> On 3/1/21 3:09 PM, Daniel Vetter wrote:
> > On Mon, Mar 1, 2021 at 11:17 AM Christian König
> > wrote:
> > >
> > >
> > > Am 01.03.21 um 10:21 schrieb Thomas Hellström (Intel):
> > > > On 3/1/21 10:05 AM, Daniel
On 3/1/21 3:09 PM, Daniel Vetter wrote:
On Mon, Mar 1, 2021 at 11:17 AM Christian König
wrote:
Am 01.03.21 um 10:21 schrieb Thomas Hellström (Intel):
On 3/1/21 10:05 AM, Daniel Vetter wrote:
On Mon, Mar 01, 2021 at 09:39:53AM +0100, Thomas Hellström (Intel)
wrote:
Hi,
On 3/1/21 9:28 AM,
On Mon, Mar 1, 2021 at 11:17 AM Christian König
wrote:
>
>
>
> Am 01.03.21 um 10:21 schrieb Thomas Hellström (Intel):
> >
> > On 3/1/21 10:05 AM, Daniel Vetter wrote:
> >> On Mon, Mar 01, 2021 at 09:39:53AM +0100, Thomas Hellström (Intel)
> >> wrote:
> >>> Hi,
> >>>
> >>> On 3/1/21 9:28 AM,
Am 01.03.21 um 10:21 schrieb Thomas Hellström (Intel):
On 3/1/21 10:05 AM, Daniel Vetter wrote:
On Mon, Mar 01, 2021 at 09:39:53AM +0100, Thomas Hellström (Intel)
wrote:
Hi,
On 3/1/21 9:28 AM, Daniel Vetter wrote:
On Sat, Feb 27, 2021 at 9:06 AM Thomas Hellström (Intel)
wrote:
On
On 3/1/21 10:05 AM, Daniel Vetter wrote:
On Mon, Mar 01, 2021 at 09:39:53AM +0100, Thomas Hellström (Intel) wrote:
Hi,
On 3/1/21 9:28 AM, Daniel Vetter wrote:
On Sat, Feb 27, 2021 at 9:06 AM Thomas Hellström (Intel)
wrote:
On 2/26/21 2:28 PM, Daniel Vetter wrote:
So I think it stops gup.
On Mon, Mar 01, 2021 at 09:39:53AM +0100, Thomas Hellström (Intel) wrote:
> Hi,
>
> On 3/1/21 9:28 AM, Daniel Vetter wrote:
> > On Sat, Feb 27, 2021 at 9:06 AM Thomas Hellström (Intel)
> > wrote:
> > > On 2/26/21 2:28 PM, Daniel Vetter wrote:
> > > > So I think it stops gup. But I haven't
Hi,
On 3/1/21 9:28 AM, Daniel Vetter wrote:
On Sat, Feb 27, 2021 at 9:06 AM Thomas Hellström (Intel)
wrote:
On 2/26/21 2:28 PM, Daniel Vetter wrote:
So I think it stops gup. But I haven't verified at all. Would be good
if Christian can check this with some direct io to a buffer in system
On Sat, Feb 27, 2021 at 9:06 AM Thomas Hellström (Intel)
wrote:
> On 2/26/21 2:28 PM, Daniel Vetter wrote:
> > So I think it stops gup. But I haven't verified at all. Would be good
> > if Christian can check this with some direct io to a buffer in system
> > memory.
>
> Hmm,
>
> Docs (again
On 2/26/21 2:28 PM, Daniel Vetter wrote:
On Fri, Feb 26, 2021 at 10:41 AM Thomas Hellström (Intel)
wrote:
On 2/25/21 4:49 PM, Daniel Vetter wrote:
On Thu, Feb 25, 2021 at 11:44 AM Daniel Vetter wrote:
On Thu, Feb 25, 2021 at 11:28:31AM +0100, Christian König wrote:
Am 24.02.21 um 10:31
On Fri, Feb 26, 2021 at 10:41 AM Thomas Hellström (Intel)
wrote:
>
>
> On 2/25/21 4:49 PM, Daniel Vetter wrote:
> > On Thu, Feb 25, 2021 at 11:44 AM Daniel Vetter wrote:
> >> On Thu, Feb 25, 2021 at 11:28:31AM +0100, Christian König wrote:
> >>> Am 24.02.21 um 10:31 schrieb Daniel Vetter:
>
On 2/25/21 4:49 PM, Daniel Vetter wrote:
On Thu, Feb 25, 2021 at 11:44 AM Daniel Vetter wrote:
On Thu, Feb 25, 2021 at 11:28:31AM +0100, Christian König wrote:
Am 24.02.21 um 10:31 schrieb Daniel Vetter:
On Wed, Feb 24, 2021 at 10:16 AM Thomas Hellström (Intel)
wrote:
On 2/24/21 9:45 AM,
Am 25.02.21 um 16:49 schrieb Daniel Vetter:
On Thu, Feb 25, 2021 at 11:44 AM Daniel Vetter wrote:
On Thu, Feb 25, 2021 at 11:28:31AM +0100, Christian König wrote:
Am 24.02.21 um 10:31 schrieb Daniel Vetter:
On Wed, Feb 24, 2021 at 10:16 AM Thomas Hellström (Intel)
wrote:
On 2/24/21 9:45
On Thu, Feb 25, 2021 at 11:44 AM Daniel Vetter wrote:
>
> On Thu, Feb 25, 2021 at 11:28:31AM +0100, Christian König wrote:
> > Am 24.02.21 um 10:31 schrieb Daniel Vetter:
> > > On Wed, Feb 24, 2021 at 10:16 AM Thomas Hellström (Intel)
> > > wrote:
> > > >
> > > > On 2/24/21 9:45 AM, Daniel
On Thu, Feb 25, 2021 at 11:30:23AM +0100, Christian König wrote:
>
>
> Am 24.02.21 um 19:46 schrieb Jason Gunthorpe:
> > On Wed, Feb 24, 2021 at 09:45:51AM +0100, Daniel Vetter wrote:
> >
> > > Hm I figured everyone just uses MAP_SHARED for buffer objects since
> > > COW really makes absolutely
On Thu, Feb 25, 2021 at 11:28:31AM +0100, Christian König wrote:
> Am 24.02.21 um 10:31 schrieb Daniel Vetter:
> > On Wed, Feb 24, 2021 at 10:16 AM Thomas Hellström (Intel)
> > wrote:
> > >
> > > On 2/24/21 9:45 AM, Daniel Vetter wrote:
> > > > On Wed, Feb 24, 2021 at 8:46 AM Thomas Hellström
Am 24.02.21 um 19:46 schrieb Jason Gunthorpe:
On Wed, Feb 24, 2021 at 09:45:51AM +0100, Daniel Vetter wrote:
Hm I figured everyone just uses MAP_SHARED for buffer objects since
COW really makes absolutely no sense. How would we enforce this?
In RDMA we test
Am 24.02.21 um 10:31 schrieb Daniel Vetter:
On Wed, Feb 24, 2021 at 10:16 AM Thomas Hellström (Intel)
wrote:
On 2/24/21 9:45 AM, Daniel Vetter wrote:
On Wed, Feb 24, 2021 at 8:46 AM Thomas Hellström (Intel)
wrote:
On 2/23/21 11:59 AM, Daniel Vetter wrote:
tldr; DMA buffers aren't normal
On Wed, Feb 24, 2021 at 09:45:51AM +0100, Daniel Vetter wrote:
> Hm I figured everyone just uses MAP_SHARED for buffer objects since
> COW really makes absolutely no sense. How would we enforce this?
In RDMA we test
drivers/infiniband/core/ib_core_uverbs.c: if (!(vma->vm_flags &
On Wed, Feb 24, 2021 at 10:16 AM Thomas Hellström (Intel)
wrote:
>
>
> On 2/24/21 9:45 AM, Daniel Vetter wrote:
> > On Wed, Feb 24, 2021 at 8:46 AM Thomas Hellström (Intel)
> > wrote:
> >>
> >> On 2/23/21 11:59 AM, Daniel Vetter wrote:
> >>> tldr; DMA buffers aren't normal memory, expecting that
On 2/24/21 9:45 AM, Daniel Vetter wrote:
On Wed, Feb 24, 2021 at 8:46 AM Thomas Hellström (Intel)
wrote:
On 2/23/21 11:59 AM, Daniel Vetter wrote:
tldr; DMA buffers aren't normal memory, expecting that you can use
them like that (like calling get_user_pages works, or that they're
accounting
On Wed, Feb 24, 2021 at 8:46 AM Thomas Hellström (Intel)
wrote:
>
>
> On 2/23/21 11:59 AM, Daniel Vetter wrote:
> > tldr; DMA buffers aren't normal memory, expecting that you can use
> > them like that (like calling get_user_pages works, or that they're
> > accounting like any other normal
On 2/23/21 11:59 AM, Daniel Vetter wrote:
tldr; DMA buffers aren't normal memory, expecting that you can use
them like that (like calling get_user_pages works, or that they're
accounting like any other normal memory) cannot be guaranteed.
Since some userspace only runs on integrated devices,
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