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9636258f10
The s_hdrwords variable was used to indicate whether a packet was already built on a previous iteration of the send engine. This variable assumed the protection of the QP's RVT_S_BUSY flag, which was required since the the QP's s_lock was dropped just prior to the packet being queued on the one of the egress mechanisms. Support for multiple send engine instantiations require that the field not be used due to concurency issues. The ps.txreq signals the "already built" without the potential concurency issues. Fix by getting rid of all s_hdrword usage. A wrapper is added to test for the already built case that used to use s_hdrwords. What used to be stored in s_hdrwords is now in the txreq. The PBC is not counted, but is added in the pio/sdma code paths prior to posting the packet. Reviewed-by: Don Hiatt <don.hiatt@intel.com> Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.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.