Re: [PATCH v2 for-next] RDMA/hns: Create CQ with selected CQN for bank load balance

[Jason Gunthorpe <jgg@nvidia.com>]

On Thu, Jan 07, 2021 at 04:36:29PM +0800, Weihang Li wrote:
> From: Yangyang Li <liyangyang20@huawei.com>
> 
> In order to improve performance by balancing the load between different
> banks of cache, the CQC cache is desigend to choose one of 4 banks
> according to lower 2 bits of CQN. The hns driver needs to count the number
> of CQ on each bank and then assigns the CQ being created to the bank with
> the minimum load first.
> 
> Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
> Signed-off-by: Weihang Li <liweihang@huawei.com>
> ---
> Changes since v1:
> - Change GFP_ATOMIC to GFP_KERNEL as there is a chance of memory allocation
>   failure, and change the spin lock to mutex lock because ida_alloc_range()
>   may sleep.
> - Link: https://patchwork.kernel.org/project/linux-rdma/patch/1609742115-47270-1-git-send-email-liweihang@huawei.com/
> 
>  drivers/infiniband/hw/hns/hns_roce_cq.c     | 115 +++++++++++++++++++++++-----
>  drivers/infiniband/hw/hns/hns_roce_device.h |  10 ++-
>  drivers/infiniband/hw/hns/hns_roce_main.c   |   8 +-
>  3 files changed, 105 insertions(+), 28 deletions(-)

Applied to for-next, thanks

Jason