diff options
| author |   Aaron Tomlin <atomlin@atomlin.com> | 2026-03-24 20:11:58 -0400 |
|---|---|---|
| committer |   Borislav Petkov (AMD) <bp@alien8.de> | 2026-04-02 00:11:35 +0200 |
| commit | d06b8e7c97c3290e61006e30b32beb9e715fab82 (patch) | |
| tree | 7fd8728e004431311e7f0516d7158e64f02c3311 /include/uapi/linux/can/ssh:/git@git.zx2c4.com | |
| parent | Linux 7.0-rc6 (diff) | |
fs/resctrl: Report invalid domain ID when parsing io_alloc_cbm
The last_cmd_status file is intended to report details about the most recent
resctrl filesystem operation, specifically to aid in diagnosing failures.
However, when parsing io_alloc_cbm, if a user provides a domain ID that does
not exist in the resource, the operation fails with -EINVAL without updating
last_cmd_status. This results in inconsistent behaviour where the system call
returns an error, but last_cmd_status misleadingly reports "ok", leaving the
user unaware that the failure was caused by an invalid domain ID.
Write an error message to last_cmd_status when the target domain ID cannot
be found.
Fixes: 28fa2cce7a83 ("fs/resctrl: Introduce interface to modify io_alloc capacity bitmasks")
Suggested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Babu Moger <babu.moger@amd.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://patch.msgid.link/20260325001159.447075-2-atomlin@atomlin.com
Diffstat (limited to 'include/uapi/linux/can/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions