--On Wednesday, June 04, 2003 15:38:09 -0700 Andrew Morton <akpm@digeo.com>
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()?

Gah.  I don't know how I convinced myself that code was safe.  It's easily
fixed.  How does this one look?

Dave

======================================================================
Dave McCracken          IBM Linux Base Kernel Team      1-512-838-3059
dmccr@us.ibm.com                                        T/L   678-3059