[RFC 0/2] virtio-pmem: Asynchronous flush

[Pankaj Gupta]

 Jeff reported preflush order issue with the existing implementation
 of virtio pmem preflush. Dan suggested[1] to implement asynchronous flush
 for virtio pmem using work queue as done in md/RAID. This patch series
 intends to solve the preflush ordering issue and also makes the flush
 asynchronous from the submitting thread POV.

 Submitting this patch series for feeback and is in WIP. I have
 done basic testing and currently doing more testing.

Pankaj Gupta (2):
  pmem: make nvdimm_flush asynchronous
  virtio_pmem: Async virtio-pmem flush

 drivers/nvdimm/nd_virtio.c   | 66 ++++++++++++++++++++++++++----------
 drivers/nvdimm/pmem.c        | 15 ++++----
 drivers/nvdimm/region_devs.c |  3 +-
 drivers/nvdimm/virtio_pmem.c |  9 +++++
 drivers/nvdimm/virtio_pmem.h | 12 +++++++
 5 files changed, 78 insertions(+), 27 deletions(-)

[1] https://marc.info/?l=linux-kernel&m=157446316409937&w=2
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2.20.1