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Some userspace apps make assumptions that rendering against multiple contexts within the same process (from the same thread, with appropriate MakeCurrent() calls) provides sufficient synchronization without any external synchronization (ie. glFenceSync()/glWaitSync()). Since a submitqueue maps to a gl/vk context, having multiple sched entities of the same priority only works with implicit sync enabled. To fix this, limit things to a single sched entity per priority level per process. An alternative would be sharing submitqueues between contexts in userspace, but tracking of per-context faults (ie. GL_EXT_robustness) is already done at the submitqueue level, so this is not an option. Signed-off-by: Rob Clark <robdclark@chromium.org>
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.