As discussed in another recent thread, LGA2011 SandBridge-EP processors are cheap, but motherboard prices are verging on absurd.
Indeed, X79 motherboard price just like gold, especially EOF. It's still hard to find a good price in second-hand market. But the other way, maybe can try Haswell-EP with X99 motherboard. Since Broadwell-EP prepare to come out, it may a good opportunity to pick one processor in second-hand market. 2016-05-18 4:52 GMT+08:00 Alex Williamson <alex.l.william...@gmail.com>: > > > On Tue, May 17, 2016 at 1:19 PM, Brian Yglesias < > br...@atlanticdigitalsolutions.com> 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. > > _______________________________________________ > vfio-users mailing list > vfio-users@redhat.com > https://www.redhat.com/mailman/listinfo/vfio-users > >
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