Hi
Am 12.06.25 um 01:18 schrieb Michael Kelley:
From: Michael Kelley Sent: Thursday, June 5, 2025 10:39 AM
From: Thomas Zimmermann Sent: Thursday, June 5, 2025
8:36 AM
Hi
Am 04.06.25 um 23:43 schrieb Michael Kelley:
[...]
Nonetheless, there's an underlying issue. A main cause of the differe
From: Michael Kelley Sent: Thursday, June 5, 2025 10:39 AM
>
> From: Thomas Zimmermann Sent: Thursday, June 5, 2025
> 8:36 AM
> >
> > Hi
> >
> > Am 04.06.25 um 23:43 schrieb Michael Kelley:
> > [...]
> > > Nonetheless, there's an underlying issue. A main cause of the difference
> > > is the numbe
Hi
Am 05.06.25 um 19:38 schrieb Michael Kelley:
[...]
I try to address the problem with the patches at
https://lore.kernel.org/dri-devel/20250605152637.98493-1-tzimmerm...@suse.de/
Testing and feedback is much appreciated.
Nice!
I ran the same test case with your patches, and everything wor
From: Thomas Zimmermann Sent: Thursday, June 5, 2025 8:36
AM
>
> Hi
>
> Am 04.06.25 um 23:43 schrieb Michael Kelley:
> [...]
> > Nonetheless, there's an underlying issue. A main cause of the difference
> > is the number of messages to Hyper-V to update dirty regions. With
> > hyperv_fb using de
Hi
Am 04.06.25 um 23:43 schrieb Michael Kelley:
[...]
Nonetheless, there's an underlying issue. A main cause of the difference
is the number of messages to Hyper-V to update dirty regions. With
hyperv_fb using deferred I/O, the messages are limited 20/second, so
the total number of messages to H
On 04.06.25 23:58, Michael Kelley wrote:
From: Michael Kelley Sent: Tuesday, June 3, 2025 10:25 AM
From: David Hildenbrand Sent: Tuesday, June 3, 2025 12:55 AM
On 03.06.25 03:49, Michael Kelley wrote:
From: David Hildenbrand Sent: Monday, June 2, 2025 2:48 AM
[snip]
@@ -182,20 +221,
Hi
Am 04.06.25 um 23:43 schrieb Michael Kelley:
From: Simona Vetter Sent: Wednesday, June 4, 2025 7:46
AM
On Wed, Jun 04, 2025 at 10:12:45AM +0200, Thomas Zimmermann wrote:
Hi
Am 03.06.25 um 19:50 schrieb Michael Kelley:
From: Thomas Zimmermann Sent: Monday, June 2, 2025 11:25
PM
Hi
Am
From: Michael Kelley Sent: Tuesday, June 3, 2025 10:25 AM
>
> From: David Hildenbrand Sent: Tuesday, June 3, 2025 12:55
> AM
> >
> > On 03.06.25 03:49, Michael Kelley wrote:
> > > From: David Hildenbrand Sent: Monday, June 2, 2025
> > > 2:48 AM
> > >>
[snip]
> > >>> @@ -182,20 +221,34 @@ st
From: Simona Vetter Sent: Wednesday, June 4, 2025 7:46
AM
>
> On Wed, Jun 04, 2025 at 10:12:45AM +0200, Thomas Zimmermann wrote:
> > Hi
> >
> > Am 03.06.25 um 19:50 schrieb Michael Kelley:
> > > From: Thomas Zimmermann Sent: Monday, June 2, 2025
> > > 11:25 PM
> > > > Hi
> > > >
> > > > Am 03.
On Wed, Jun 04, 2025 at 10:12:45AM +0200, Thomas Zimmermann wrote:
> Hi
>
> Am 03.06.25 um 19:50 schrieb Michael Kelley:
> > From: Thomas Zimmermann Sent: Monday, June 2, 2025
> > 11:25 PM
> > > Hi
> > >
> > > Am 03.06.25 um 03:49 schrieb Michael Kelley:
> > > [...]
> > > > > Will the VMA have
Hi
Am 03.06.25 um 19:50 schrieb Michael Kelley:
From: Thomas Zimmermann Sent: Monday, June 2, 2025 11:25
PM
Hi
Am 03.06.25 um 03:49 schrieb Michael Kelley:
[...]
Will the VMA have VM_PFNMAP or VM_MIXEDMAP set? PFN_SPECIAL is a
horrible hack.
In another thread, you mention that you use PFN_
From: Thomas Zimmermann Sent: Monday, June 2, 2025 11:25
PM
>
> Hi
>
> Am 03.06.25 um 03:49 schrieb Michael Kelley:
> [...]
> >> Will the VMA have VM_PFNMAP or VM_MIXEDMAP set? PFN_SPECIAL is a
> >> horrible hack.
> >>
> >> In another thread, you mention that you use PFN_SPECIAL to bypass the
>
From: David Hildenbrand Sent: Tuesday, June 3, 2025 12:55 AM
>
> On 03.06.25 03:49, Michael Kelley wrote:
> > From: David Hildenbrand Sent: Monday, June 2, 2025 2:48
> > AM
> >>
> >> On 23.05.25 18:15, mhkelle...@gmail.com wrote:
> >>> From: Michael Kelley
> >>>
> >>> Current defio code works
On 03.06.25 03:49, Michael Kelley wrote:
From: David Hildenbrand Sent: Monday, June 2, 2025 2:48 AM
On 23.05.25 18:15, mhkelle...@gmail.com wrote:
From: Michael Kelley
Current defio code works only for framebuffer memory that is allocated
with vmalloc(). The code assumes that the underlying
Hi
Am 03.06.25 um 03:49 schrieb Michael Kelley:
[...]
Will the VMA have VM_PFNMAP or VM_MIXEDMAP set? PFN_SPECIAL is a
horrible hack.
In another thread, you mention that you use PFN_SPECIAL to bypass the
check in vm_mixed_ok(), so VM_MIXEDMAP is likely not set?
The VMA has VM_PFNMAP set, not V
From: David Hildenbrand Sent: Monday, June 2, 2025 2:48 AM
>
> On 23.05.25 18:15, mhkelle...@gmail.com wrote:
> > From: Michael Kelley
> >
> > Current defio code works only for framebuffer memory that is allocated
> > with vmalloc(). The code assumes that the underlying page refcount can
> > be
On 23.05.25 18:15, mhkelle...@gmail.com wrote:
From: Michael Kelley
Current defio code works only for framebuffer memory that is allocated
with vmalloc(). The code assumes that the underlying page refcount can
be used by the mm subsystem to manage each framebuffer page's lifecycle,
including fr
On Fri, May 23, 2025 at 09:15:21AM -0700, mhkelle...@gmail.com wrote:
> Commit 37b4837959cb ("video: deferred io with physically contiguous
> memory") from the year 2008 purported to add support for contiguous
> kernel memory framebuffers. The motivating device, sh_mobile_lcdcfb, uses
> dma_alloc_c
everything
patch link:
https://lore.kernel.org/r/20250523161522.409504-4-mhklinux%40outlook.com
patch subject: [PATCH v3 3/4] fbdev/deferred-io: Support contiguous kernel
memory framebuffers
config: arm-randconfig-001-20250524
(https://download.01.org/0day-ci/archive/20250524/20250524155
From: Michael Kelley
Current defio code works only for framebuffer memory that is allocated
with vmalloc(). The code assumes that the underlying page refcount can
be used by the mm subsystem to manage each framebuffer page's lifecycle,
including freeing the page if the refcount goes to 0. This ap
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