[Drbd-dev] [PATCH 01/10] block: make generic_make_request handle arbitrarily sized bios

Keith Busch keith.busch at intel.com
Tue Apr 28 18:01:26 CEST 2015


On Tue, 28 Apr 2015, Christoph Hellwig wrote:
> This seems to lack support for QUEUE_FLAG_SG_GAPS to work around
> the retarded PPR format in the NVMe driver.

Might strong words, sir! I'm missing the context here, but I'll say PRP
is much more efficient for h/w to process over SGL, and the requirement
comes from that h/w rather than the driver.


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