site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com On Jan 18, 2009, at 8:28 PM, searockcliff wrote: I find the line of code near the panic is memcpy(). But the parameters are fine. So my question is: Can the Mac OS X kernel NOT handle large memory (>2GB) well? Or the memcpy() function fails sometime on large memory? It sounds suspiciously like you're having 32-bit/64-bit address issues. William Kucharski _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... One important thing: The kernel panic only occurs on Mac Pro with memory larger than 2GB, like 3GB, 4GB,9GB and so on. If I reduce the memory used to 2GB by boot-args, the kernel panic disappears. What are the addresses you are copying between, and how much are you trying to copy at one time? This email sent to site_archiver@lists.apple.com