From: Jason Gunthorpe <jgg@nvidia.com>
To: Weihang Li <liweihang@huawei.com>
Cc: <dledford@redhat.com>, <leon@kernel.org>,
<linux-rdma@vger.kernel.org>, <linuxarm@openeuler.org>
Subject: Re: [PATCH v2 RFC 0/7] RDMA/hns: Add support for Dynamic Context Attachment
Date: Fri, 5 Feb 2021 14:03:15 -0400 [thread overview]
Message-ID: <20210205180315.GA969245@nvidia.com> (raw)
In-Reply-To: <1611394994-50363-1-git-send-email-liweihang@huawei.com>
On Sat, Jan 23, 2021 at 05:43:07PM +0800, Weihang Li wrote:
> The hip09 introduces the DCA(Dynamic Context Attachment) feature which
> supports many RC QPs to share the WQE buffer in a memory pool. If a QP
> enables DCA feature, the WQE's buffer will not be allocated when creating
> but when the users start to post WRs. This will reduce the memory
> consumption when there are too many QPs are inactive.
>
> Changes since v1:
> * Replace all GFP_ATOMIC with GFP_NOWAIT, because the former may use
> emergency pool if no regular memory can be found.
> * Change size of cap_flags of alloc_ucontext_resp from 32 to 64 to avoid
> a potential problem when pass it back to the userspace.
> * Move definition of HNS_ROCE_CAP_FLAG_DCA_MODE to hns-abi.h.
> * Rename free_mem_states() to free_dca_states() in #1.
> * Link: https://patchwork.kernel.org/project/linux-rdma/cover/1610706138-4219-1-git-send-email-liweihang@huawei.com/
>
> Xi Wang (7):
> RDMA/hns: Introduce DCA for RC QP
> RDMA/hns: Add method for shrinking DCA memory pool
> RDMA/hns: Configure DCA mode for the userspace QP
> RDMA/hns: Add method for attaching WQE buffer
> RDMA/hns: Setup the configuration of WQE addressing to QPC
> RDMA/hns: Add method to detach WQE buffer
> RDMA/hns: Add method to query WQE buffer's address
>
> drivers/infiniband/hw/hns/Makefile | 2 +-
> drivers/infiniband/hw/hns/hns_roce_dca.c | 1264 +++++++++++++++++++++++++++
> drivers/infiniband/hw/hns/hns_roce_dca.h | 68 ++
> drivers/infiniband/hw/hns/hns_roce_device.h | 31 +
> drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 223 ++++-
> drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 3 +
> drivers/infiniband/hw/hns/hns_roce_main.c | 27 +-
> drivers/infiniband/hw/hns/hns_roce_qp.c | 119 ++-
> include/uapi/rdma/hns-abi.h | 64 ++
Where are the rdma-core changes to go with this?
Jason
next prev parent reply other threads:[~2021-02-05 18:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-23 9:43 [PATCH v2 RFC 0/7] RDMA/hns: Add support for Dynamic Context Attachment Weihang Li
2021-01-23 9:43 ` [PATCH v2 RFC 1/7] RDMA/hns: Introduce DCA for RC QP Weihang Li
2021-01-23 9:43 ` [PATCH v2 RFC 2/7] RDMA/hns: Add method for shrinking DCA memory pool Weihang Li
2021-01-23 9:43 ` [PATCH v2 RFC 3/7] RDMA/hns: Configure DCA mode for the userspace QP Weihang Li
2021-01-23 9:43 ` [PATCH v2 RFC 4/7] RDMA/hns: Add method for attaching WQE buffer Weihang Li
2021-01-23 9:43 ` [PATCH v2 RFC 5/7] RDMA/hns: Setup the configuration of WQE addressing to QPC Weihang Li
2021-01-23 9:43 ` [PATCH v2 RFC 6/7] RDMA/hns: Add method to detach WQE buffer Weihang Li
2021-01-23 9:43 ` [PATCH v2 RFC 7/7] RDMA/hns: Add method to query WQE buffer's address Weihang Li
2021-02-05 18:03 ` Jason Gunthorpe [this message]
2021-02-07 3:34 ` [PATCH v2 RFC 0/7] RDMA/hns: Add support for Dynamic Context Attachment liweihang
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