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Hairpin entries creation is fully synchronized by hairpin_tbl_lock. In order to allow concurrent initialization of mlx5e_hairpin structure instances and provisioning of hairpin entries to hardware, extend mlx5e_hairpin_entry with 'res_ready' completion. Move call to mlx5e_hairpin_create() out of hairpin_tbl_lock critical section. Modify code that attaches new flows to existing hpe to wait for 'res_ready' completion before using the hpe. Insert hpe to hairpin table before provisioning it to hardware and modify all users of hairpin table to verify that hpe was fully initialized by checking hpe->hp pointer (and to wait for 'res_ready' completion, if necessary). Modify dead peer update event handling function to save hpe's to temporary list with their reference counter incremented. Wait for completion of hpe's in temporary list and update their 'peer_gone' flag outside of hairpin_tbl_lock critical section. Signed-off-by: Vlad Buslov <vladbu@mellanox.com> Reviewed-by: Roi Dayan <roid@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.