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When resuming after hibernate sometimes we see hangs in unrelated kernel subsystems. These hangs often result in the following i915 trace: i915 0000:00:02.0: [drm] *ERROR* \ intel_gt_reset_global timed out, cancelling all in-flight rendering implying our reset task has been starved by the hanging kernel subsystem, causing us to inappropiately declare the system as wedged beyond recovery. The trace would be caused by our synchronize_srcu_expedited() taking more than the allowed 5s due to the unrelated kernel hang. But we neither need to perform that synchronisation inside the reset watchdog, nor do we need such a short timeout before declaring the device as unrecoverable. v2: Restore watchdog timeout to the previous 5 seconds (Ashutosh) Bug: https://gitlab.freedesktop.org/drm/intel/-/issues/3575 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220630043959.5708-1-ashutosh.dixit@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.