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Pinning lots of small buffer objects, such as cursors or sprites, to video memory can lead to fragmentation, which is a problem for devices with only a small amount of memory. As a result, framebuffer images might not get pinned, even though there's enough space available overall. The flag DRM_GEM_VRAM_PL_FLAG_TOPDOWN marks buffer objects to be pinned at the high end of video memory. This leaves contiguous space available at the memory's low end. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20190923172753.26593-2-tzimmermann@suse.de Reviewed-by: Gerd Hoffmann <kraxel@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.