On Fri, Jan 13, 2017 at 05:20:08PM -0700, Ross Zwisler wrote: > We still have a lot of work to do, though, and I'd like to propose a discussion > around what features people would like to see enabled in the coming year as > well as what what use cases their customers have that we might not be aware of. +1 to the discussion > - Jan suggested [2] that we could use the radix tree as a cache to service DAX > faults without needing to call into the filesystem. Are there any issues > with this approach, and should we move forward with it as an optimization? Ahem. I believe I proposed this at last year's LSFMM. And I sent patches to start that work. And Dan blocked it. So I'm not terribly amused to see somebody else given credit for the idea. It's not just an optimisation. It's also essential for supporting filesystems which don't have block devices. I'm aware of at least two customer demands for this in different domains. 1. Embedded uses with NOR flash 2. Cloud/virt uses with multiple VMs on a single piece of hardware -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>