mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-03 13:32:07 -04:00
e3f3a0f269
The design of our interrupt handlers is that we ack the receipt of the interrupt first, inside the critical section where the master interrupt control is off and other cpus cannot start processing the next interrupt; and then process the interrupt events afterwards. However, Icelake introduced a whole new set of banked GT_IIR that are inherently serialised and slow to retrieve the IIR and must be processed within the critical section. We can still push our breadcrumbs out of this critical section by using our irq_worker. On bdw+, this should not make too much of a difference as we only slightly defer the breadcrumbs, but on icl+ this should make a big difference to our throughput of interrupts from concurrently executing engines. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191127115813.3345823-1-chris@chris-wilson.co.uk
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.