On Tue, Nov 22, 2022 at 4:25 AM Hans Verkuil wrote:
>
> I tracked the use of 'force' all the way back to the first git commit
> (2.6.12-rc1) in the very old video-buf.c. So it is very, very old and the
> reason is lost in the mists of time.
Well, not entirely.
For archaeology reasons, I went bac
On 22.11.22 15:07, Hans Verkuil wrote:
On 11/22/22 13:38, David Hildenbrand wrote:
On 22.11.22 13:25, Hans Verkuil wrote:
Hi Tomasz, David,
On 11/8/22 05:45, Tomasz Figa wrote:
Hi David,
On Tue, Nov 8, 2022 at 1:19 AM David Hildenbrand wrote:
FOLL_FORCE is really only for debugger access.
On 11/22/22 13:38, David Hildenbrand wrote:
> On 22.11.22 13:25, Hans Verkuil wrote:
>> Hi Tomasz, David,
>>
>> On 11/8/22 05:45, Tomasz Figa wrote:
>>> Hi David,
>>>
>>> On Tue, Nov 8, 2022 at 1:19 AM David Hildenbrand wrote:
FOLL_FORCE is really only for debugger access. According to c
On 22.11.22 13:25, Hans Verkuil wrote:
Hi Tomasz, David,
On 11/8/22 05:45, Tomasz Figa wrote:
Hi David,
On Tue, Nov 8, 2022 at 1:19 AM David Hildenbrand wrote:
FOLL_FORCE is really only for debugger access. According to commit
707947247e95 ("media: videobuf2-vmalloc: get_userptr: buffers ar
Hi Tomasz, David,
On 11/8/22 05:45, Tomasz Figa wrote:
> Hi David,
>
> On Tue, Nov 8, 2022 at 1:19 AM David Hildenbrand wrote:
>>
>> FOLL_FORCE is really only for debugger access. According to commit
>> 707947247e95 ("media: videobuf2-vmalloc: get_userptr: buffers are always
>> writable"), the p
On 08.11.22 05:45, Tomasz Figa wrote:
Hi David,
Hi Tomasz,
thanks for looking into this!
On Tue, Nov 8, 2022 at 1:19 AM David Hildenbrand wrote:
FOLL_FORCE is really only for debugger access. According to commit
707947247e95 ("media: videobuf2-vmalloc: get_userptr: buffers are always
wri
Hi David,
On Tue, Nov 8, 2022 at 1:19 AM David Hildenbrand wrote:
>
> FOLL_FORCE is really only for debugger access. According to commit
> 707947247e95 ("media: videobuf2-vmalloc: get_userptr: buffers are always
> writable"), the pinned pages are always writable.
Actually that patch is only a wo
FOLL_FORCE is really only for debugger access. According to commit
707947247e95 ("media: videobuf2-vmalloc: get_userptr: buffers are always
writable"), the pinned pages are always writable.
FOLL_FORCE in this case seems to be a legacy leftover. Let's just remove
it.
Cc: Tomasz Figa
Cc: Marek Szy
