Re: "[mi] EQ overflowing. The server is probably stuck in an infinite loop."
I recompiled my kernel with CONFIG_MTRR_SANITIZER and all of the issues seem to have gone away.
There is an unusually high number of Gentoo Linux users posting about this issue (myself included) and almost all Gentoo Linux users compile their kernels. Most Gentoo Linux users modify a kernel .config file provided by kernel-seeds.org, which has CONFIG_MTRR_SANITIZER disabled by default. For those having this issue, please try recompiling your kernels with CONFIG_MTRR_SANITIZER. If you are having the issue and do have CONFIG_MTRR_SANITIZER enabled in your kernel, please report that you do. If enough people report what their kernel configurations are, perhaps we can get to the bottom of this.