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Message-ID: <AANLkTi=gAdLEaPfo==AMerh_kE2-+Va2oir-jHrNRu4u@mail.gmail.com> Date: Fri, 6 Aug 2010 10:02:36 +1000 From: Peter Crosthwaite <peter.crosthwaite@...alogix.com> To: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> Cc: linux-kernel@...r.kernel.org, cl@...ux-foundation.org, penberg@...helsinki.fi, mpm@...enic.com, michal.simek@...alogix.com, edgar.iglesias@...alogix.com, john.williams@...alogix.com Subject: Re: Using Bootmem for large DMA buffers in the presence of the slab allocator Hi Everyone, Thanks for your replies. I am going to stick with my start_kernel() edit until this CMA engine comes along. Regards, Peter On Thu, Aug 5, 2010 at 10:16 AM, FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> wrote: > On Wed, 4 Aug 2010 16:07:52 +1000 > Peter Crosthwaite <peter.crosthwaite@...alogix.com> wrote: > >> I am currently developing Kernel code to allocate and reserve a large >> (64MB) contiguous buffer for DMA. > > A buffer needs to be physically continuous (your hardware can't do > scatter gather)? If so, as already pointed out, there is no pretty > solution for it. > > There are some drivers that need to do such so the issue has been > under discussion: > > http://marc.info/?l=linux-mm&m=128015343705933&w=2 > -- 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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