diff options
| author | Reinette Chatre <reinette.chatre@intel.com> | 2026-06-30 21:27:08 -0700 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-07-26 21:22:37 -0700 |
| commit | b37678cfe51c21f291caa290d1f0e26c74c65060 (patch) | |
| tree | 448aca5d345b508bb902a3c67c06308d1cf69a27 /fs/resctrl/rdtgroup.c | |
| parent | 242c0ab4d51dec094285fca4e1f55e1a2e923fce (diff) | |
| download | linux-next-b37678cfe51c21f291caa290d1f0e26c74c65060.tar.gz linux-next-b37678cfe51c21f291caa290d1f0e26c74c65060.zip | |
fs/resctrl: Add last_cmd_status support for writes to max_threshold_occupancy
info/last_cmd_status is intended to contain more information if a write to
any resctrl file fails. Writes to max_threshold_occupancy did not receive
last_cmd_status support during initial last_cmd_status enabling. Add it now.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://patch.msgid.link/dfc60cf5324e15612db075b0987bd89c490fbad5.1782857711.git.reinette.chatre@intel.com
Diffstat (limited to 'fs/resctrl/rdtgroup.c')
| -rw-r--r-- | fs/resctrl/rdtgroup.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index 3020f4428b4e..72347d11f0da 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -1299,14 +1299,20 @@ static ssize_t max_threshold_occ_write(struct kernfs_open_file *of, unsigned int bytes; int ret; - ret = kstrtouint(buf, 0, &bytes); - if (ret) - return ret; - if (!info_kn_lock(of->kn)) return -ENOENT; + rdt_last_cmd_clear(); + + ret = kstrtouint(buf, 0, &bytes); + if (ret) { + rdt_last_cmd_puts("max_threshold_occupancy: Invalid input\n"); + goto out_unlock; + } + if (bytes > resctrl_rmid_realloc_limit) { + rdt_last_cmd_printf("max_threshold_occupancy: Exceeds limit (before adjustment) of %u bytes\n", + resctrl_rmid_realloc_limit); ret = -EINVAL; goto out_unlock; } |