[RFC 0/3] nvme uring passthrough diet

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

When you disable all the optional features in your kernel config and
request queue, it looks like the normal request dispatching is just as
fast as any attempts to bypass it. So let's do that instead of
reinventing everything.

This doesn't require additional queues or user setup. It continues to
work with multiple threads and processes, and relies on the well tested
queueing mechanisms that track timeouts, handle tag exhuastion, and sync
with controller state needed for reset control, hotplug events, and
other error handling.

Marked RFC right now because I haven't tested out multipath or teardown.

Keith Busch (3):
  nvme: skip block cgroups for passthrough commands
  nvme: fix cdev name leak
  nvme: create special request queue for cdev

 drivers/nvme/host/core.c  | 39 ++++++++++++++++++++++++++++++++++-----
 drivers/nvme/host/ioctl.c |  6 +++---
 drivers/nvme/host/nvme.h  |  1 +
 include/linux/bio.h       |  7 ++++++-
 4 files changed, 44 insertions(+), 9 deletions(-)

-- 
2.34.1