From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jes Sorensen Date: Fri, 17 Mar 2006 09:42:01 +0000 Subject: Re: [patch] mspec - special memory driver and do_no_pfn handler Message-Id: <441A8469.8020504@sgi.com> List-Id: References: <20060316163728.06f49c00.akpm@osdl.org> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Linus Torvalds Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, hch@lst.de, cotte@de.ibm.com, Hugh Dickins Linus Torvalds wrote: > Quite frankly, I don't think nopfn() is a good interface. It's only usable > for one single thing, so trying to claim that it's a generic VM op is > really not valid. If (and that's a big if) we need this interface, we > should just do it inside mm/memory.c instead of playing games as if it was > generic. Hi Linus, As Robin mentioned I believe Carsten was also looking for this interface and I received an email from Bjorn Helgas after posting this stating that he was also looking for it, so there may be several users for it. I believe it was originally Christoph who suggested we took this approach to avoid playing tricks on do_no_page. However, if you have a suggestion for how to do it in a better way, I shall be happy to try and implement it that way instead, if you'll share the details. Cheers, Jes