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An interesting snippet from Sandybridge's prm: "Although a Ring Buffer can be enabled in the non-empty state, it must not be disabled unless it is empty. Attempting to disable a Ring Buffer in the non-empty state is UNDEFINED." Let's avoid the undefined behaviour as we disable the rings prior to reset and resume. v2: Tell HEAD to catch up to TAIL (empty ring) first, then reset both to 0 (supposedly while stopped). Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171027094311.30380-1-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.