Re: [PATCH] Re: bad pmd ffff810000207238(9090909090909090).

[Ingo Molnar]

* Hugh Dickins <hugh@xxxxxxxxxxx> wrote:

> [PATCH] x86: fix bad pmd ffff810000207xxx(9090909090909090)
> 
> 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.

applied, nice catch!

	Ingo
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