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If GuC firmware performs an engine reset while that engine had a preemption pending, it will set the terminated attribute bit on our preemption stage descriptor. GuC firmware retains all pending work items for a high-priority GuC client, unlike the normal-priority GuC client where work items are dropped. It wants to make sure the preempt- to-idle work doesn't run when scheduling resumes, and uses this bit to inform its scheduler and presumably us as well. Our job is to clear it for the next preemption after reset, otherwise that and future preemptions will never complete. We'll just clear it every time. Signed-off-by: Jeff McGee <jeff.mcgee@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171101221630.25086-1-jeff.mcgee@intel.com Reviewed-by: Michel Thierry <michel.thierry@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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.