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When sending I/O, if size is larger than rdma_readwrite_threshold we prepare to send SMB write packet for a RDMA read via memory registration. The actual I/O is done by remote peer through local RDMA hardware. Modify the relevant fields in the packet accordingly, and append a smbd_buffer_descriptor_v1 to the end of the SMB write packet. On write I/O finish, deregister the memory region if this was for a RDMA read. If remote invalidation is not used, the call to smbd_deregister_mr will do local invalidation and possibly wait. Memory region is normally deregistered in MID callback as soon as it's used. There are situations where the MID may not be created on I/O failure, under which memory region is deregistered when write data context is released. Signed-off-by: Long Li <longli@microsoft.com> Signed-off-by: Steve French <smfrench@gmail.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.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.