Re: [PATCH 2/3] media/videobuf1|2: Mark follow_pfn usage as unsafe

2021-03-17 Thread Daniel Vetter
On Wed, Mar 17, 2021 at 8:22 AM Christoph Hellwig wrote: > On Tue, Mar 16, 2021 at 04:52:44PM +0100, Daniel Vetter wrote: > > My understanding is mostly, but with some objections. And I kinda > > don't want to let this die in a bikeshed and then not getting rid of > > follow_pfn as a result. There

Re: [PATCH 2/3] media/videobuf1|2: Mark follow_pfn usage as unsafe

2021-03-16 Thread Daniel Vetter
On Tue, Mar 16, 2021 at 4:46 PM Christoph Hellwig wrote: > > On Tue, Mar 16, 2021 at 04:33:02PM +0100, Daniel Vetter wrote: > > The media model assumes that buffers are all preallocated, so that > > when a media pipeline is running we never miss a deadline because the > > buffers aren't allocated