From: Yuval Shaia <yuval.shaia@oracle.com>
To: berrange@redhat.com, thuth@redhat.com, philmd@redhat.com,
pbonzini@redhat.com, laurent@vivier.eu, qemu-devel@nongnu.org,
yuval.shaia@oracle.com, marcel.apfelbaum@gmail.com
Subject: [Qemu-devel] [PATCH 0/2] rdma: Utilize ibv_reg_mr_iova for memory registration
Date: Sun, 18 Aug 2019 16:21:05 +0300 [thread overview]
Message-ID: <20190818132107.18181-1-yuval.shaia@oracle.com> (raw)
The virtual address that is provided by the guest in post_send and
post_recv operations is related to the guest address space. This
address
space is unknown to the HCA resides on host so extra step in these
operations is needed to adjust the address to host virtual address.
This step, which is done in data-path affects performances.
An enhanced verion of MR registration introduced here
https://patchwork.kernel.org/patch/11044467/ can be used so that the
guest virtual address space for this MR is known to the HCA in host.
This will save the data-path adjustment.
patch #1 deals with what is needed to detect if the library installed in
the host supports this function
patch #2 enhance the data-path ops by utilizing the new function
Yuval Shaia (2):
configure: Check if we can use ibv_reg_mr_iova
hw/rdma: Utilize ibv_reg_mr_iova for memory registration
configure | 28 ++++++++++++++++++++++++++++
hw/rdma/rdma_backend.c | 13 +++++++++++++
hw/rdma/rdma_backend.h | 5 +++++
hw/rdma/rdma_rm.c | 5 +++++
hw/rdma/vmw/pvrdma_main.c | 6 ++++++
5 files changed, 57 insertions(+)
--
2.20.1
next reply other threads:[~2019-08-18 13:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-18 13:21 Yuval Shaia [this message]
2019-08-18 13:21 ` [Qemu-devel] [PATCH 1/2] configure: Check if we can use ibv_reg_mr_iova Yuval Shaia
2019-08-31 19:28 ` Marcel Apfelbaum
2019-09-01 9:25 ` Yuval Shaia
2019-08-18 13:21 ` [Qemu-devel] [PATCH 2/2] hw/rdma: Utilize ibv_reg_mr_iova for memory registration Yuval Shaia
2019-08-31 19:31 ` Marcel Apfelbaum
2019-09-01 9:30 ` Yuval Shaia
2019-08-31 19:26 ` [Qemu-devel] [PATCH 0/2] rdma: " Marcel Apfelbaum
2019-11-05 11:23 ` Marcel Apfelbaum
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