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Date: Wed, 07 Mar 2007 11:24:45 +0100 From: Peter Zijlstra <a.p.zijlstra@...llo.nl> To: Nick Piggin <npiggin@...e.de> Cc: Miklos Szeredi <miklos@...redi.hu>, akpm@...ux-foundation.org, mingo@...e.hu, linux-mm@...ck.org, linux-kernel@...r.kernel.org, benh@...nel.crashing.org Subject: Re: [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear) On Wed, 2007-03-07 at 11:21 +0100, Nick Piggin wrote: > On Wed, Mar 07, 2007 at 11:13:20AM +0100, Miklos Szeredi wrote: > > > *sigh* yes was looking at all that code, thats gonna be darn slow > > > though, but I'll whip up a patch. > > > > Well, if it's going to be darn slow, maybe it's better to go with > > mingo's plan on emulating nonlinear vmas with linear ones. That'll be > > There are real users who want these fast, though. Yeah, why don't we have a tree per nonlinear vma to find these pages? wli mentions shadow page tables.. > > darn slow as well, but at least it will be much less complicated. > > IMO, the best thing to do is just restore msync behaviour, and comment > the fact that we ignore nonlinears. We need to restore msync behaviour > to fix races in regular mappings anyway, at least for now. Seems to be the best quick solution indeed. - 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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