>>>>> "Christoph" == Christoph Hellwig <hch@xxxxxxxxxxxxx> writes: Christoph> On Tue, Jun 26, 2007 at 10:07:24AM -0700, Jared Hulbert Christoph> wrote: >> If you have a large array of a non-volatile semi-writeable memory >> such as a highspeed NOR Flash or some of the similar emerging >> technologies in a system. It would be useful to use that memory as >> an extension of RAM. One of the ways you could do that is allow >> pages to be swapped out to this memory. Once there these pages >> could be read directly, but would require a COW procedure on a >> write access. The reason why I think this may be a vm/fs topic is >> that the hardware makes writing to this memory efficiently a >> non-trivial operation that requires management just like a >> filesystem. Also it seems to me that there are probably overlaps >> between this topic and the recent filemap_xip.c discussions. Christoph> So what you mean is "swap on flash" ? Defintively sounds Christoph> like an interesting topic, although I'm not too sure it's Christoph> all that filesystem-related. You need either a block translation layer, or a (swap) filesystem that understands flash peculiarities in order to make such a thing work. The standard Linux swap format will not work. -- Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia - 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
