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Date: Tue, 21 May 2002 05:10:31 -0700 (PDT)
Message-Id: <20020521.051031.56144279.davem@redhat.com>
To: paulus@samba.org
Cc: torvalds@transmeta.com, linux-kernel@vger.kernel.org
Subject: Re: Make 2.5.17 TLB even more friendlier
From: "David S. Miller" <davem@redhat.com>
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   From: Paul Mackerras <paulus@samba.org>
   Date: Tue, 21 May 2002 22:18:42 +1000 (EST)

   I still need tlb_end_vma in this case - or at least I need a hook
   that gets called after all the tlb_remove_tlb_entry calls are done but
   before clear_page_tables is called.  If I had that hook (called in
   both the exit_mmap and unmap cases) then I would not need the
   tlb_start/end_vma hooks.
   
You get called via pte_free_tlb() and pmd_free_tlb() for every
operation performed by clear_page_tables().  The PTEs themselves are
all cleared out at the point that clear_page_tables, so you can't
possibly need the PTE contents.  I am assuming therefore you just
need to get at the linkage, and those two pte/pmd hooks give you
that.