On Tue, Oct 02, 2018 at 07:37:13AM -0700, Christoph Hellwig wrote: > No, it should not. DAX is an implementation detail thay may change > or go away at any time. Well we had an issue with an application checking for dax, this is how we landed here in the first place. It's not that I want them to do it, it's more that they're actually doing it in all kinds of interesting ways and then complaining when it doesn't work anymore. So it's less of an "API beauty price problem" but more of a "provide a documented way which we won't break" way. Byte, Johannes -- Johannes Thumshirn Storage jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850