Messages in this thread | | | Date | Sun, 15 Aug 2004 16:55:57 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: page fault fastpath: Increasing SMP scalability by introducing pte locks? |
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On Mon, 16 Aug 2004, Andi Kleen wrote:
> Christoph Lameter <clameter@sgi.com> writes: > > > On Sun, 15 Aug 2004, David S. Miller wrote: > > > >> > >> Is the read lock in the VMA semaphore enough to let you do > >> the pgd/pmd walking without the page_table_lock? > >> I think it is, but just checking. > > > > That would be great.... May I change the page_table lock to > > be a read write spinlock instead? > > That's probably not a good idea. r/w locks are extremly slow on > some architectures. Including ia64.
I was thinking about a read write spinlock not an readwrite semaphore. Look at include/asm-ia64/spinlock.h. The implementations are almost the same. Are you sure about this?
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