a97b786bfa
We move the virtual breadcrumb from one physical engine to the next, if the next virtual request is scheduled on a new physical engine. Since the virtual context can only be in one signal queue, we need it to track the current physical engine for the new breadcrumbs. However, to move the list we need both breadcrumb locks -- and since we cannot take both at the same time (unless we are careful and always ensure consistent ordering) stage the movement of the signaler via the current virtual request. Closes: https://gitlab.freedesktop.org/drm/intel/issues/1510 Fixes:6d06779e86("drm/i915: Load balancing across a virtual engine") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200325130059.30600-1-chris@chris-wilson.co.uk (cherry picked from commit6c81e21a47) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.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.