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Date: Tue, 22 Mar 2005 03:40:53 -0800
From: Andrew Morton <akpm@osdl.org>
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Subject: Re: [PATCH 1/5] freepgt: free_pgtables use vma list
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With these six patches the ppc64 is hitting the BUG in exit_mmap():

        BUG_ON(mm->nr_ptes);    /* This is just debugging */

fairly early in boot.