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It is sometimes desirable to run a command on all cpus in xmon. A typical scenario is to obtain the backtrace from all cpus in xmon if there is a soft lockup. Add rudimentary support for the same. The command to be run on all cpus should be prefixed with 'c#'. As an example, 'c#t' will run 't' command and produce a backtrace on all cpus in xmon. Since many xmon commands are not sensible for running in this manner, we only allow a predefined list of commands -- 'r', 'S' and 't' for now. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210601074801.617363-1-naveen.n.rao@linux.vnet.ibm.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.