Thanks, Amit. Here's /proc/mtrr: reg00: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 reg01: base=0x100000000 (4096MB), size=4096MB: write-back, count=1 reg02: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1 reg03: base=0xe0000000 (3584MB), size= 512MB: uncachable, count=1 reg04: base=0xdff00000 (3583MB), size= 1MB: write-through, count=1
In the meantime, I'd done a bit more testing, and found that this also affects the Mandriva and Gentoo installers/Live CDs. Therefore, I cross-filed it as a kernel bug (I hope that was the right thing to do): http://bugzilla.kernel.org/show_bug.cgi?id=8883 Interestingly, the performance is slow on Fedora core 7's x86 install CD, but fine on Knoppix 5.01 x86. I've also asked Gigabyte tech support in case it's a BIOS bug; no reply as yet. And yes, I do think it sounds quite similar to #132577. -- kernel performance is *very* slow with 8GB RAM on AMD64. 6GB is fine. kernel 2.6.22-8 x86_64 https://bugs.launchpad.net/bugs/129172 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
