Re: [PATCH v5 38/40] fs/resctrl: Add boiler plate for external resctrl code

[Reinette Chatre]

Hi James,

On 10/4/24 11:03 AM, James Morse wrote:
...
> +++ b/fs/resctrl/Kconfig
> @@ -0,0 +1,37 @@
> +config RESCTRL_FS
> +	bool "CPU Resource Control Filesystem (resctrl)"
> +	depends on ARCH_HAS_CPU_RESCTRL
> +	select KERNFS
> +	select PROC_CPU_RESCTRL if PROC_FS
> +	help
> +	  Some architectures provide hardware facilities to group tasks and
> +	  monitor and control their usage of memory system resources such as
> +	  caches and memory bandwidth.  Examples of such facilities include
> +	  Intel's Resource Director Technology (Intel(R) RDT) and AMD's
> +	  Platform Quality of Service (AMD QoS).
> +
> +	  If your system has the necessary support and you want to be able to
> +	  assign tasks to groups and manipulate the associated resource
> +	  monitors and controls from userspace, say Y here to get a mountable
> +	  'resctrl' filesystem that lets you do just that.
> +
> +	  If nothing mounts or prods the 'resctrl' filesystem, resource
> +	  controls and monitors are left in a quiescent, permissive state.
> +
> +	  On architectures where this can be disabled independently, it is
> +	  safe to say N.
> +
> +	  See <file:Documentation/arch/x86/resctrl.rst> for more information.
> +
> +config RESCTRL_FS_PSEUDO_LOCK
> +	bool
> +	help
> +	  Software mechanism to pin data in a cache portion using
> +	  micro-architecture specific knowledge.
> +

There now seems to be two copies of this ... patch #23 added this exact same
"config RESCTRL_FS_PSEUDO_LOCK" snippet to arch/x86/Kconfig

> +config RESCTRL_RMID_DEPENDS_ON_CLOSID
> +	bool
> +	help
> +	  Enable by the architecture when the RMID values depend on the CLOSID.

"Enable by" -> "Enabled by"?

> +	  This causes the closid allocator to search for CLOSID with clean
> +	  RMID.

Reinette