From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carsten Otte Date: Fri, 17 Mar 2006 12:29:48 +0000 Subject: Re: [patch] mspec - special memory driver and do_no_pfn handler Message-Id: <441AABBC.1060809@de.ibm.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 , Jes Sorensen , linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, hch@lst.de, Hugh Dickins , Arnd Bergmann 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. Execute in place would be the second single thing we'll need it for. Also, I remember a statement from Anrd that it has value for SPUfs on Cell which does count as singe thing #3. With three single things at hand, I believe there is some sense in makeing it "a generic thing". Carsten