On Tue, May 17, 2016 at 1:19 PM, Brian Yglesias < [email protected]> wrote:
> The first is an Asus Rampage II Gene. While the manual claims VT-d > support, Asus boards are known to break PCI pass through in linux. The CPU > is a ci7 920. > > I went out and purchased a ga-ex58-ud5, partly because I'd heard reports > of it working in Linux with a few different configuratio > > The first is an Asus Rampage II Gene. While the manual claims VT-d > support, Asus boards are known to break PCI pass through in linux. The CPU > is a ci7 920. > > I went out and purchased a ga-ex58-ud5, partly because I'd heard reports > of it working in Linux with a few different configurations, and also > because I know GB released a beta BIOS in response to community requests > for proper VT-d support. > > The spec page for the 930 does not specifically list VT-d, and I could use > another CPU anyway, so I bought a Xeon E5670. > > I enable VT-d and once again, rcu_shed detected HardLock on cpu0. Kthread > starved for 769 jiffies! > > It is essentially the exact same error as with the Rampage II Gene. > > At this point I start looking for a software problem. I'm using the > latest Debian, and the kernel is 4.4.X. I installed a 4.2 kernel and tried > again. > > The same thing happened, except that now rcu_shed detects "stalls", not > HardLock, on cpu0. The system does not boot beyond that point (this > happens right as the kernel is loaded at the beginning of boot). > > I'm not sure if this distinction is helpful. The system hangs well before > logging, and there is no kernel dump. > > I took a picture of my screen with the older kernel (stalls not > hardlocks), and attached it. > Still not attached. > I'm using Proxmox 4.2 VE (latest), which I think I recall reading uses an > Ubuntu kernel. > > I attempted a couple of LiveCDs, only to find they don't use grub, and the > Intel_iommu parameter does nothing in isolinux. > Hmm, usually just a matter of hitting <tab> and adding the option, it's definitely possible to do this. > I'm not sure how to proceed from here, aside from buying new hardware. > X58 is my only option for LGA1366, and comparable LGA2011 stuff is not > cheap. > As discussed in another recent thread, LGA2011 SandBridge-EP processors are cheap, but motherboard prices are verging on absurd.
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