Re: [Qemu-devel] [PATCH 4/4] block: Add VFIO based NVMe driver

2016-12-20 Thread Paolo Bonzini
- Original Message - > From: "Fam Zheng" > To: qemu-devel@nongnu.org > Cc: "Paolo Bonzini" , qemu-bl...@nongnu.org, "Karl > Rister" , "Kevin Wolf" > , "Max Reitz" , borntrae...@de.ibm.com, > "Stefan Hajnoczi" > Sent: Tuesday, December 20, 2016 5:31:39 PM > Subject: [PATCH 4/4] block:

[Qemu-devel] [PATCH 4/4] block: Add VFIO based NVMe driver

2016-12-20 Thread Fam Zheng
This is a new protocol driver that exclusively opens a host NVMe controller through VFIO. It achieves better latency than linux-aio. nvme://linux-aio -- fio bs=4k iodepth=1 (IOPS)