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

From: Pankaj Gupta
Date: Mon Apr 20 2020 - 09:20:05 EST


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