On 4/27/2015 11:48 AM, Linus Torvalds wrote: > On Mon, Apr 27, 2015 at 8:39 AM, Alex Williamson > <alex.william...@redhat.com> wrote: >> >> Since this got pulled anyway, do you plan to follow-up with patches to >> limit the graphics RMRR exception to the known and acceptable uses and >> document them, or should I send a revert patch? I don't think what we >> have here is acceptable going forward or being backported to stable. >> Thanks, > > Does anybody actually *care* about RMRR?
I care, just not so much for GPUs. > The thing is shit. We know it's shit. We already had Linda pipe up to > tell us that there are bogus RMRR's for ever slot in older machines. I'd call them unnecessary. > And we already ignore RMRR for USB controllers because it was just > useless garbage. > > Is there any reason to *not* just ignore RMRR for all video devices > like we do now? Seriously? I was only speaking about one particular use case of RMRR for video devices. I'm not sure what anyone else is doing with them. > I'm *so* not impressed with firmware tables. These things are always > uniformly wrong. We should strive to generate the information from our > actual hardware knowledge, with BIOS tables being the absolutely least > trusted source of information. In some cases though, you really do need the firmware to provide the tables. Too few RMRRs are worse than too many. -- ljk > > Linus > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
