On Fri, Sep 08, 2017 at 04:21:52PM -0700, Hao Chen wrote: > This is expected. To get a better performance of XFS on NVMe drive, it > is advised not use use the realtime discard option. > > https://www.intel.com/content/dam/support/us/en/documents/ssdc/data-center-ssds/Intel_Linux_NVMe_Guide_330602-002.pdf
Again, this will depend on your device. Intel in particular was the example in my presentation for horrible performance of the NVMe discard support - other vendors implement much better discard support, so you'll see much better results.
