RDMA/uverbs: Add new relaxed ordering memory region access flag (2233c660) · Commits · 戴 / test

Add a new relaxed ordering access flag for memory regions. Using memory regions with relaxed ordeing set can enhance performance. This access flag is handled in a best-effort manner, drivers should ignore if they don't support setting relaxed ordering. Link: https://lore.kernel.org/r/1578506740-22188-9-git-send-email-yishaih@mellanox.com Signed-off-by:

Michael Guralnik <michaelgur@mellanox.com> Signed-off-by:

Yishai Hadas <yishaih@mellanox.com> Signed-off-by:

Jason Gunthorpe <jgg@mellanox.com>

include/rdma/ib_verbs.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -1418,6 +1418,7 @@ enum ib_access_flags {
		IB_ZERO_BASED = IB_UVERBS_ACCESS_ZERO_BASED,
		IB_ACCESS_ON_DEMAND = IB_UVERBS_ACCESS_ON_DEMAND,
		IB_ACCESS_HUGETLB = IB_UVERBS_ACCESS_HUGETLB,
		IB_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_RELAXED_ORDERING,

		IB_ACCESS_OPTIONAL = IB_UVERBS_ACCESS_OPTIONAL_RANGE,
		IB_ACCESS_SUPPORTED =

include/uapi/rdma/ib_user_ioctl_verbs.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -54,6 +54,7 @@ enum ib_uverbs_access_flags {
		IB_UVERBS_ACCESS_ON_DEMAND = 1 << 6,
		IB_UVERBS_ACCESS_HUGETLB = 1 << 7,

		IB_UVERBS_ACCESS_RELAXED_ORDERING = IB_UVERBS_ACCESS_OPTIONAL_FIRST,
		IB_UVERBS_ACCESS_OPTIONAL_RANGE =
		((IB_UVERBS_ACCESS_OPTIONAL_LAST << 1) - 1) &
		~(IB_UVERBS_ACCESS_OPTIONAL_FIRST - 1)

Admin message