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SubjectRe: x86 bootmem corruption
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> reserved.  This is the fix against 2.4.5pre1. This might explain weird
> crashes and "reserved twice" error messages at boot on highmem systems.

Reserved twice occurs for two known reasons

BIOS reporting the same region twice or overlaps (fixed in -ac sent to Linus)
find_smp_config blindly reserves pages that may already be marked as ROM and
thus reserved anyway

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