Sound like a memory issue. Problem is - AFAIR memtest86 is 32bit and can only access 4GB of RAM.

I'm having a really weird issue, and I'm sure that someone must have heard of something like this. Yum seg faults when I ask it to do "things" when I have >4096M of physical memory installed. I'm running on a system with a Core 2 Quad, QX9770, with a x86_64 install of Fedora 12 from  LIVE CD. If I drop physical memory down to <= 4096M, everything is happy.  But for >= 4096M, not so happy. Other parts of the system seem to be working OK. I can bring up Firefox, muck about in it, etc. My windows come up without issue. But YUM can't seem to handle having too much physical memory (which just strikes me as profoundly weird). Any clues?

On Wed, May 5, 2010 at 7:22 PM, Marcus D. Leech <mleech(a)ripnet.com&gt; wrote: > I'm having a really weird issue, and I'm sure that someone must have > heard of something like this. > > Yum seg faults when I ask it to do "things" when I have >4096M of > physical memory installed. > > I'm running on a system with a Core 2 Quad, QX9770, with a x86_64 > install of Fedora 12 from > LIVE CD. > > If I drop physical memory down to <= 4096M, everything is happy. But > for >= 4096M, not so happy. > > Other parts of the system seem to be working OK. I can bring up Firefox, > muck about in it, etc. > > My windows come up without issue. > > But YUM can't seem to handle having too much physical memory (which just > strikes me as profoundly weird). > > Any clues? > :) Sounds like a bug.. Is it reproducible? If so, maybe grabbing an strace of the session could shed some light on it. I have a virtual system that i can allocate 5G or so. If you post what you were trying to do, perhaps I can replicate.