diff options
| author | Babu Moger <babu.moger@amd.com> | 2025-09-05 16:34:28 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-09-15 12:47:17 +0200 |
| commit | 88bee79640aea6192f98c8faae30e0013453479d (patch) | |
| tree | 640f247ac4d0782102762c313a19491b59c6e2b6 /fs/resctrl/rdtgroup.c | |
| parent | cba8222880b88d96f3ed6c8a115e335e552b83a1 (diff) | |
fs/resctrl: Introduce the interface to modify assignments in a group
Enable the mbm_l3_assignments resctrl file to be used to modify counter
assignments of CTRL_MON and MON groups when the "mbm_event" counter
assignment mode is enabled.
Process the assignment modifications in the following format:
<Event>:<Domain id>=<Assignment state>;<Domain id>=<Assignment state>
Event: A valid MBM event in the
/sys/fs/resctrl/info/L3_MON/event_configs directory.
Domain ID: A valid domain ID. When writing, '*' applies the changes
to all domains.
Assignment states:
_ : Unassign a counter.
e : Assign a counter exclusively.
Examples:
$ cd /sys/fs/resctrl
$ cat /sys/fs/resctrl/mbm_L3_assignments
mbm_total_bytes:0=e;1=e
mbm_local_bytes:0=e;1=e
To unassign the counter associated with the mbm_total_bytes event on
domain 0:
$ echo "mbm_total_bytes:0=_" > mbm_L3_assignments
$ cat /sys/fs/resctrl/mbm_L3_assignments
mbm_total_bytes:0=_;1=e
mbm_local_bytes:0=e;1=e
To unassign the counter associated with the mbm_total_bytes event on
all the domains:
$ echo "mbm_total_bytes:*=_" > mbm_L3_assignments
$ cat /sys/fs/resctrl/mbm_L3_assignments
mbm_total_bytes:0=_;1=_
mbm_local_bytes:0=e;1=e
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
Diffstat (limited to 'fs/resctrl/rdtgroup.c')
| -rw-r--r-- | fs/resctrl/rdtgroup.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index 519aa6acef5b..bd4a115ffea1 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -1939,9 +1939,10 @@ static struct rftype res_common_files[] = { }, { .name = "mbm_L3_assignments", - .mode = 0444, + .mode = 0644, .kf_ops = &rdtgroup_kf_single_ops, .seq_show = mbm_L3_assignments_show, + .write = mbm_L3_assignments_write, }, { .name = "mbm_assign_mode", |