Messages in this thread | | | From | Gabriel C <> | Date | Fri, 8 Jun 2018 15:32:06 +0200 | Subject | Re: Kernel and ADM hardware roulette ( was AMD graphics performance regression in 4.15 and later ) |
| |
2018-06-08 8:52 GMT+02:00 Christian König <christian.koenig@amd.com>: > Am 08.06.2018 um 08:02 schrieb Christoph Hellwig: >> >> On Thu, Jun 07, 2018 at 02:32:46PM +0200, Gabriel C wrote: >>> >>> Ok done.. bisect points to: >> >> What is the failure mode you are seeing? Can't find anything in the >> mail unfortunately. > > > As far as I analyzed it we now get an -ENOMEM from dma_alloc_attrs() in > drivers/gpu/drm/ttm/ttm_page_alloc_dma.c when IOMMU is enabled. > > Still need to figure out which parameters we want to use for the allocation, > but I think it is only 4k or 8k.
When you guys need me to test something , or run debug patches or patches of any sort just let me know..
> > Regards, > Christian.
BR
| |