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[ Upstream commit 3caa973b7a260e7a2a69edc94c300ab9c65148c3 ] When RCU stall warning triggers, it can print out a lot of messages while holding spinlocks. If the console device is slow (e.g. an actual or IPMI serial console), it may end up triggering NMI hard lockup watchdog like the following.
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.