> From: Daniel Pocock <dan...@pocock.pro> > Date: Sat, 5 Sep 2020 14:37:13 +0200 > > On 05/09/2020 13:26, Mark Kettenis wrote: > >> From: Daniel Pocock <dan...@pocock.pro> > >> Date: Fri, 4 Sep 2020 18:32:20 +0200 > > > > Hi Daniel, > > > >> > >> On 04/09/2020 18:22, Mark Kettenis wrote: > >> > >>> Seriously though, I have an idea why this happens; I'll see if I can > >>> come up with a quick fix. > >> > >> Great, I'll be happy to test it and give some feedback > > > > I committed a quick fix that (if my calculations are right) should > > allow you to boot with 128G of RAM (but probably not with 256G). The > > latest snapshot probably already has those fixes. But if you get the > > same output, please try again in a day or so. > > > > In case you're interested, the problem is that the kernel virtual > > address space is somewhat limited in the current implementation (4G, > > which I now bumped to 6G). With 128G a large fraction of that space > > gets used for the data structures that describe the memory pages. I > > need to expand the kernel virtual address space further but that is > > a bit more work. > > Thanks for getting on to that so quickly. I will probably only be able > to test again at the end of the week, Friday, then I'll give some more > feedback. > > > >> It is a new build so I'll be trying a few different things on it before > >> putting it into serious use. Is there anything else that would be > >> useful for me to exercise in OpenBSD on Talos II? > > > > It is still early days for OpenBSD/powerpc64 so any testing you can do > > is welcome. If you end up testing additonal PCIe hardware in the > > machine let me know and I can provide some hints for adding the > > necessary drivers. > > The cards I'm likely to test this week: > > HBA: LSI SAS 9207-4i4e
Should be supported by mpii(4). I'll pre-emptively add the driver to the kernel. > GPU: Sapphire Radeon RX 580 Pulse I'm working on the amdgpu(4) driver to support this hardware, but I first need to imrpove the IOMMU support, so this is not hoing to work yet. > I have a couple of older NVIDIA GPUs lying about too, for example, > Quadro K2200. I might test them if I have some extra time. No NVIDIA GPU support in OpenBSD. > NVMe: I need to buy a more modern HBA or OCuLink adapter to run a pair > of U.2 SSDs together with some legacy SATA SSDs and HDDs. An > alternative is to just put in a dual-OCuLink card for the U.2 drives and > use my existing 9207-4i4e for the legacy drives. If you can make any > suggestions which card or combination of cards to consider that would be > helpful, especially if they are cards that other OpenBSD users have > already validated on other architectures. The nvme(4) driver supports NVMe drivers, so I suppose OCuLink will just work. I think mpii(4) supports the Broadcom HBA 9400 series which supports SAS/SATA/NVMe. As far as I can tell there is no support for the HBA 9500 series yet, which is of course what you'd want on a machine that supports PCIe 4.0. The mpii(4) driver is widely used by OpenBSD users and is probably your safest bet overall.
