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Due to below reasons, it is better to not support alternate path receive messages for RoCE in near term. 1. Alternate path for RoCE is not supported at rdmacm layer. 2. It is not supported in uverbs/core layer for RoCE. 3. Alternate path for IPv6 for link local address cannot resolve route determinstically without a valid incoming interface id whose usecase make sense only with dual port mode. 4. init_av_from_path while processing LAP messages for IB and RoCE can lead to adding duplicate entry of AV into the port list, leads to list corruption. 5. rdma-core userspace a well known userspace implementation has removed support of libucm which use ucm.ko module, which is the only module that can trigger alternate path related messages. 6. ucm kernel module is requested to be removed from the IB core in patch [1]. [1] https://patchwork.kernel.org/patch/10268503/ Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.