On Sun, Jan 22, 2017 at 06:39:28PM +0000, Matthew Wilcox wrote: > Two guests on the same physical machine (or a guest and a host) have access to the same set of physical addresses. This might be an NV-DIMM, or it might just be DRAM (for the purposes of reducing guest overhead). The network filesystem has been enhanced with a call to allow the client to ask the server "What is the physical address for this range of bytes in this file?" > > We don't want to use the guest pagecache here. That's antithetical to the second usage, and it's inefficient for the first usage. And the answer is that you need a dax device for whatever memoery exposed in this way, as it needs to show up in the memory map for example. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
