From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3D3B925D.624986EE@zip.com.au> Date: Sun, 21 Jul 2002 22:04:29 -0700 From: Andrew Morton MIME-Version: 1.0 Subject: Re: [PATCH][1/2] return values shrink_dcache_memory etc References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Linus Torvalds Cc: Rik van Riel , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Ed Tomlinson List-ID: Linus Torvalds wrote: > > On Sat, 20 Jul 2002, Rik van Riel wrote: > > > > OK, I'll try to forward-port Ed's code to do that from 2.4 to 2.5 > > this weekend... > > Side note: while I absolutely think that is the right thing to do, that's > also the much more "interesting" change. As a result, I'd be happier if it > went through channels (ie probably Andrew) and had some wider testing > first at least in the form of a CFT on linux-kernel. > I'd suggest that we avoid putting any additional changes into the VM until we have solutions available for: 2: Make it work with pte-highmem (Bill Irwin is signed up for this) 4: Move the pte_chains into highmem too (Bill, I guess) 6: maybe GC the pte_chain backing pages. (Seems unavoidable. Rik?) Especially pte_chains in highmem. Failure to fix this well is a showstopper for rmap on large ia32 machines, which makes it a showstopper full stop. If we can get something in place which works acceptably on Martin Bligh's machines, and we can see that the gains of rmap (whatever they are ;)) are worth the as-yet uncoded pains then let's move on. But until then, adding new stuff to the VM just makes a `patch -R' harder to do. - -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/