On Friday, Aug 25th 2006 at 11:03 -0700, quoth Peter Roopnarine: =>Hi, => I hope that someone out there can help me. I have an 8-way Opteron running =>Fedora 5. Yesterday I attempted to add 8 Gb of ECC RAM to the current 8 Gb of =>ECC RAM, and upon selecting the OS from the GRUB menu got a kernel panic =>screen. I've since removed the new RAM, returning the memory configuration to =>exactly the starting state, and still no luck. I've also tried to run =>memtest86 but it hangs, and I cannot boot into linux rescue mode. The message =>that I get there is: =>kernel direct mapping tables up to 200000000 @ 8000-8000 =>PANIC: early exception rip ffffffff801172db error 0 cr2 ffffffffff5fd023 =>PANIC: early exception rip ffffffff801172db error 0 cr2 ffffffffff5fd023 => =>The system reports 7166 MB of memory present. I am going to try the memory =>modules one at a time, and hope that the problem lies there. A different =>hardware problem would not be good, and a hard disk problem would be =>horrible. => Thanks for any help! I thought that memtest86 did not work on ecc memory. Has that been fixed? Also, I believe that linux three different memory management paging algorithms. Algorithm selection is done at kernel build time. It shouldn't panic, but I would expect a performance impact. Other than that you just have to play swapping games with figuring out which memory card or which slot on the mudderboard is bad. -- Time flies like the wind. Fruit flies like a banana. Stranger things have .0. happened but none stranger than this. Does your driver's license say Organ ..0 Donor?Black holes are where God divided by zero. Listen to me! We are all- 000 individuals! What if this weren't a hypothetical question? steveo at syslang.net