004746e4b1
With async migration, the shrinker may end up wanting to release the pages of an object while the migration blit is still running, since the GT migration code doesn't set up VMAs and the shrinker is thus oblivious to the fact that the GPU is still using the pages. Add waiting for gpu in the shrinker_release_pages() op and an argument to that function indicating whether the shrinker expects it to not wait for gpu. In the latter case the shrinker_release_pages() op will return -EBUSY if the object is not idle. Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211122214554.371864-5-thomas.hellstrom@linux.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.