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The "mbm_event" counter assignment mode offers "num_mbm_cntrs" number of counters that can be assigned to RMID, event pairs and monitor bandwidth usage as long as it is assigned. If all the counters are in use, the kernel logs the error message "Failed to allocate counter for <event> in domain <id>" in /sys/fs/resctrl/info/last_cmd_status when a new assignment is requested. To make space for a new assignment, users must unassign an already assigned counter and retry the assignment again. Add the functionality to unassign and free the counters in the domain. Also, add the helper rdtgroup_unassign_cntrs() to unassign counters in the group. 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 |
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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 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.