Re: [PATCH 01/10] block: make generic_make_request handle arbitrarily sized bios

From: Keith Busch
Date: Tue Apr 28 2015 - 12:01:37 EST

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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