nvme: allow user toggling hmb usage

Browse source

The NVMe host memory buffer may consume a non-negligable amount of
memory. Controllers are required to function without the host memory
buffer enabled, but with possibly degraded performance. Export a sysfs
property to toggle this feature on a per-device granularity so users may
choose to reclaim memory at the expense of storage performance.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

...

This commit is contained in:

Keith Busch 2021-07-27 09:40:43 -07:00 • committed by Christoph Hellwig

parent e5ad96f388

commit a5df5e79c4

1 changed files with 44 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

45

drivers/nvme/host/pci.c

View file