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Date: Sat, 15 Aug 2015 10:59:54 +0200 From: Christoph Hellwig <hch@....de> To: Dan Williams <dan.j.williams@...el.com> Cc: Jerome Glisse <j.glisse@...il.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Boaz Harrosh <boaz@...xistor.com>, Rik van Riel <riel@...hat.com>, "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>, Dave Hansen <dave.hansen@...ux.intel.com>, david <david@...morbit.com>, Ingo Molnar <mingo@...nel.org>, Linux MM <linux-mm@...ck.org>, Ingo Molnar <mingo@...hat.com>, Mel Gorman <mgorman@...e.de>, "H. Peter Anvin" <hpa@...or.com>, Ross Zwisler <ross.zwisler@...ux.intel.com>, "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>, Christoph Hellwig <hch@....de> Subject: Re: [RFC PATCH 1/7] x86, mm: ZONE_DEVICE for "device memory" On Fri, Aug 14, 2015 at 02:52:15PM -0700, Dan Williams wrote: > The idea is that this memory is not meant to be available to the page > allocator and should not count as new memory capacity. We're only > hotplugging it to get struct page coverage. This might need a bigger audit of the max_pfn usages. I remember architectures using it as a decisions for using IOMMUs or similar. -- 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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