nvme-pci: optimize mapping single segment requests using SGLs

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If the controller supports SGLs we can take another short cut for single
segment request, given that we can always map those without another
indirection structure, and thus don't need to create a scatterlist
structure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>

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Christoph Hellwig 2019-03-05 05:54:18 -07:00

parent dff824b2aa

commit 297910571f

1 changed files with 22 additions and 0 deletions

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drivers/nvme/host/pci.c

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