On Mon, Jun 22, 2015 at 12:39:34AM -0700, Dan Williams wrote: > Now I'm confused, you *don't* want the raw device to be hidden *and* > you want to kill the stacking? Something got crossed. The current > implementation hides nothing, you get to see the entire stacked > composition. I'd much prefer to avoid hiding anything. You see it, but you can't actually use it. The proper way to expose it would be to the devices visible in the low-level bus sysfs enumeration logic but only one ULD attach to it. > The sinister aspect of sector tearing is that most applications don't > know they have this dependency. At least today's disk's rarely ever > tear sectors and if they do you almost certainly get a CRC error on > access. NVDIMMs will always tear and always silently. I think not > merging BTT at all to see what happens is simply wrong. So now you leave your users with a choice between a rock and a hard place, that is using BTT to introduce non-significant overhead and not supporting DAX or just use it as-is. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
