Re: [PATCH] Remove page_table_lock from vma manipulations

From: Andrew Morton (akpm@digeo.com)
Date: Wed Jun 04 2003 - 17:38:09 EST

Dave McCracken wrote:
>
> After more careful consideration, I don't see any reasons why
> page_table_lock is necessary for dealing with vmas. I found one spot in
> swapoff, but it was easily changed to mmap_sem.

What keeps the VMA tree consistent when try_to_unmap_one()
runs find_vma()?
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