While this is arguably a BIOS bug, Linux's failure to support PAT is the
key failure here. Even then, we could handle this much better than we
currently do by clipping memory size to the level covered by the MTRRs.
** Changed in: linux-source-2.6.22 (Ubuntu)
Status: Invalid => Confirmed
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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
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