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ee9bdfedd3
When games, browser, or anything using a lot of GPU buffers exits, there can be many hundreds or thousands of buffers to unmap and free. If the GPU is otherwise suspended, this can cause arm-smmu to resume/suspend for each buffer, resulting 5-10 seconds worth of reprogramming the context bank (arm_smmu_write_context_bank()/arm_smmu_write_s2cr()/etc). To the user it would appear that the system just locked up. A simple solution is to use pm_runtime_put_autosuspend() instead, so we don't immediately suspend the SMMU device. Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Rob Clark <robdclark@chromium.org> Signed-off-by: Will Deacon <will@kernel.org> |
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| README | ||
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.