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Resctrl provides a user-configurable option mbm_assign_on_mkdir that determines if a counter will automatically be assigned to an RMID, event pair when its associated monitor group is created via mkdir. Enable mbm_assign_on_mkdir by default to automatically assign counters to the two default events (MBM total and MBM local) of a new monitoring group created via mkdir. This maintains backward compatibility with original resctrl support for these two events. Unassign and free counters belonging to a monitoring group when the group is deleted. Monitor group creation does not fail if a counter cannot be assigned to one or both events. There may be limited counters and users have the flexibility to modify counter assignments at a later time. Log the error message "Failed to allocate counter for <event> in domain <id>" in /sys/fs/resctrl/info/last_cmd_status when a new monitoring group is created but counter assignment failed. Signed-off-by: Babu Moger <babu.moger@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Link: https://lore.kernel.org/cover.1757108044.git.babu.moger@amd.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 reStructuredText 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.