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| Filename | Latest commit message | Latest commit date |
|---|---|---|
5554788e1d
The rcu_lockdep_current_cpu_online() function currently checks only the RCU-sched data structures to determine whether or not RCU believes that a given CPU is offline. Unfortunately, there are multiple flavors of RCU, which means that there is a short window of time during which the various flavors disagree as to whether or not a given CPU is offline. This can result in false-positive lockdep-RCU splats in which some other flavor of RCU tries to do something based on its view that the CPU is online, only to get hit with a lockdep-RCU splat because RCU-sched instead believes that the CPU is offline. This commit therefore changes rcu_lockdep_current_cpu_online() to scan all RCU flavors and to consider a given CPU to be online if any of the RCU flavors believe it to be online, thus preventing these false-positive splats. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> |
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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.
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.