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[ Upstream commit de20037e1b3c2f2ca97b8c12b8c7bca8abd509a7 ] Warning at every leaking bits can cause a flood of message, triggering various stall-warning mechanisms to fire, including CSD locks, which makes the machine to be unusable. Track the bits that are being leaked, and only warn when a new bit is set. That said, this patch will help with the following issues: 1) It will tell us which bits are being set, so, it is easy to communicate it back to vendor, and to do a root-cause analyzes. 2) It avoid the machine to be unusable, because, worst case scenario, the user gets less than 60 WARNs (one per unhandled bit). Suggested-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Sandipan Das <sandipan.das@amd.com> Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Link: https://lkml.kernel.org/r/20241001141020.2620361-1-leitao@debian.org Signed-off-by: Sasha Levin <sashal@kernel.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.