Re: [PATCH v6 10/24] x86/resctrl: Allocate the cleanest CLOSID by searching closid_num_dirty_rmid

Reinette Chatre
2023-10-03T21:14:54Z

Hi James,

On 9/14/2023 10:21 AM, James Morse wrote:
> MPAM's PMG bits extend its PARTID space, meaning the same PMG value can be
> used for different control groups.
>
> This means once a CLOSID is allocated, all its monitoring ids may still be
> dirty, and held in limbo.
>
> Instead of allocating the first free CLOSID, on architectures where
> CONFIG_RESCTRL_RMID_DEPENDS_ON_COSID is enabled, search
> closid_num_dirty_rmid[] to find the cleanest CLOSID.
>
> The CLOSID found is returned to closid_alloc() for the free list
> to be updated.
>
> Reviewed-by: Shaopeng Tan <tan.shaopeng@fujitsu.com>
> Tested-by: Shaopeng Tan <tan.shaopeng@fujitsu.com>
> Tested-By: Peter Newman <peternewman@google.com>
> Signed-off-by: James Morse <james.morse@arm.com>

Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>

Reinette