From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jack Steiner Date: Tue, 29 Jul 2003 23:56:15 +0000 Subject: Re: [PATCH] (2.4.x bk) efi_memmap_walk_uc Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org > > >>>>> On Tue, 29 Jul 2003 15:35:16 -0700, Christopher Wedgwood said: > > Christopher> That sounds pretty good. Even a naive bitmap allocator > Christopher> would probably work initially. Might we ever want to > Christopher> allocate 2+ pages? Forcing all allocations to be a > Christopher> single page makes many things easier. > > The allocation granularity should be bytes, in my opinion. The point > of the UC allocator is so that we can share a single 64MB UC granule > across the multiple users (of which there are a grand total of 2, at > the moment...). > > --david > If granularity is bytes, we need to support page-aligned allocations. Fetchop pages are mmap'ed to user space. As far as fetchop is concerned, we always allocate 1 page at a time. -- Thanks Jack Steiner (651-683-5302) (vnet 233-5302) steiner@sgi.com