x86: fix bad pmd ffff810000207xxx(9090909090909090)

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OGAWA Hirofumi and Fede have reported rare pmd_ERROR messages:
mm/memory.c:127: bad pmd ffff810000207xxx(9090909090909090).

Initialization's cleanup_highmap was leaving alignment filler
behind in the pmd for MODULES_VADDR: when vmalloc's guard page
would occupy a new page table, it's not allocated, and then
module unload's vfree hits the bad 9090 pmd entry left over.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Hugh Dickins 2008-05-28 19:36:07 +01:00 • committed by Thomas Gleixner

parent 226e9a93a2

commit 2884f110d5

1 changed files with 1 additions and 1 deletions

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arch/x86/mm/init_64.c

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