5f03a507b2
Recent patches to the DRM scheduler [1][2] allow for a variable number of run-queues and add support for (shared) workqueues rather than dedicated kthreads per scheduler. This allows us to create a 1:1 relationship between a GPU scheduler and a scheduler entity, in order to properly support firmware schedulers being able to handle an arbitrary amount of dynamically allocated command ring buffers. This perfectly matches Nouveau's needs, hence make use of it. Topology wise we create one scheduler instance per client (handling VM_BIND jobs) and one scheduler instance per channel (handling EXEC jobs). All channel scheduler instances share a workqueue, but every client scheduler instance has a dedicated workqueue. The latter is required to ensure that for VM_BIND job's free_job() work and run_job() work can always run concurrently and hence, free_job() work can never stall run_job() work. For EXEC jobs we don't have this requirement, since EXEC job's free_job() does not require to take any locks which indirectly or directly are held for allocations elsewhere. [1] https://lore.kernel.org/all/8f53f7ef-7621-4f0b-bdef-d8d20bc497ff@redhat.com/T/ [2] https://lore.kernel.org/all/20231031032439.1558703-1-matthew.brost@intel.com/T/ Signed-off-by: Danilo Krummrich <dakr@redhat.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20231114002728.3491-1-dakr@redhat.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.