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23e967e17c
Currently if there is no room to add a command to the command buffer, the driver performs a "completion wait" which only returns when all commands on the queue have been processed. There is no need to wait for the entire command queue to be executed before adding the next command. Update the driver to perform the same udelay() loop that the "completion wait" performs, but instead re-read the head pointer to determine if sufficient space is available. The very first time it is found that there is no space available, the udelay() will be skipped to immediately perform the opportunistic read of the head pointer. If it is still found that there is not sufficient space, then the udelay() will be performed. Signed-off-by: Leo Duran <leo.duran@amd.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> |
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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.