Am 25.06.2018 um 16:41 schrieb Alex Deucher: > On Mon, Jun 25, 2018 at 9:33 AM, Zhou, David(ChunMing) > <David1.Zhou at amd.com> wrote: >> current amdgpu driver indeed always set GPU PAGE SIZE is 4096. >> In fact, our gpu supports bigger page size like 64KB, just we don't use it. >> I remeber previous amdsoc(old android kernel driver) used 64KB. >> >> correct me if I'm wrong. > It's still 4k pages, but you can tweak the fragment size to make a TLB > entry cover multiple pages. Yeah, but David is right you can also directly increase the GPU page size. It's just that I'm pretty sure we will never ever support that :) Anyway original patch is Reviewed-by: Christian König <christian.koenig at amd.com>. Christian. > > Alex > >> send from Smartisan Pro >> >> Michel Dé??zer <michel at daenzer.net> äº? 2018å¹´6æ??25æ?¥ ä¸?å??5:10å??é??ï¼? >> >> On 2018-06-25 03:56 AM, zhoucm1 wrote: >>> one question to you: >>> >>> Did you consider the case that GPU_PAGE_SIZE > CPU_PAGE_SIZE? >> That is never the case: AMDGPU_GPU_PAGE_SIZE is always 4096, and >> PAGE_SIZE is always >= 4096 (an integer multiple of it). >> >> >> -- >> Earthling Michel Dänzer | http://www.amd.com >> Libre software enthusiast | Mesa and X developer >> >> _______________________________________________ >> amd-gfx mailing list >> amd-gfx at lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/amd-gfx >> > _______________________________________________ > amd-gfx mailing list > amd-gfx at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
