Re: page fault fastpath patch v2: fix race conditions, stats for 8,32 and 512 cpu SMP

From: Christoph Lameter (clameter_at_sgi.com)
Date: 08/19/04

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    Date:	Wed, 18 Aug 2004 18:19:14 -0700 (PDT)
To: Hugh Dickins <hugh@veritas.com>

    > > - One could avoid pte locking by introducing a pte_cmpxchg. cmpxchg
    > > seems to be supported by all ia64 and i386 cpus except the original 80386.
    >
    > I do think this will be a more fruitful direction than pte locking:
    > just looking through the arches for spare bits puts me off pte locking.

    Thanks for the support. Got a V3 here (not ready to post yet) that throws
    out the locks and uses cmpxchg instead. It also removes the use of
    page_table_lock completely from handle_mm_fault.
    -
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