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Date: Wed, 02 Aug 2006 14:16:50 +1000 From: Rusty Russell <rusty@...tcorp.com.au> To: Christoph Lameter <clameter@....com> Cc: Chris Wright <chrisw@...s-sol.org>, "Eric W. Biederman" <ebiederm@...ssion.com>, Jeremy Fitzhardinge <jeremy@...source.com>, akpm@...l.org, linux-kernel@...r.kernel.org, Christian Limpach <Christian.Limpach@...cam.ac.uk>, Gerd Hoffmann <kraxel@...e.de>, Hollis Blanchard <hollisb@...ibm.com>, Ian Pratt <ian.pratt@...source.com>, Zachary Amsden <zach@...are.com>, npiggin@...e.de, Ian Wienand <ianw@...ato.unsw.edu.au> Subject: Re: [PATCH 1 of 13] Add apply_to_page_range() which applies a function to a pte range On Tue, 2006-08-01 at 14:31 -0700, Christoph Lameter wrote: > On Tue, 1 Aug 2006, Chris Wright wrote: > > > We got the opposite feedback the first time we posted this function. > > Xen has some users, and I believe there's a couple in-tree functions we could > > convert easily w/out overhead issues. It's generic and this is just the > > infrastructure, I think we should leave it. > > Th generic method was proposed a number of times in the past including > by Nick Piggin and more recently by the page table abstraction layer > posted by Ian Wienand. See also > > http://www.gelato.org/pdf/apr2006/gelato_ICE06apr_unsw.pdf > http://www.gelato.org/pdf/may2005/gelato_may2005_ia64vm_chubb_unsw.pdf. > http://lwn.net/Articles/124961/ > > Special functionality may be attached at various levels, and we are very > sensitive to changes in this area. Hi Christoph, Thanks for the pointers, but as you've been debating for 18 months now, no patches are in the -mm tree or obviously about to go in, and this new helper function is orthogonal to your work, I don't think it's reasonable to delay this patch. All we can reasonably do is push this function back into the xen part of the kernel tree for now. Rusty. -- Help! Save Australia from the worst of the DMCA: http://linux.org.au/law - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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