---
name: "cxl-set-alert-config"
section: "1"
platform: "linux"
package: "ndctl"
version: "85-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/cxl-set-alert-config"
---

# cxl-set-alert-config(1)

set the warning alert threshold on a CXL memdev

## NAME

cxl-set-alert-config - set the warning alert threshold on a CXL memdev

## SYNOPSIS

```
cxl set-alert-config <mem0> [<mem1>..<memN>] [<options>]
```

## DESCRIPTION

CXL device raises an alert when its health status is changed. Critical alert shall automatically be configured by the device after a device reset. If supported, programmable warning thresholds also be initialized to vendor recommended defaults, then could be configured by the user.

Use this command to configure warning alert thresholds of a device. Having issued this command, the newly requested warning thresholds would override the previously programmed warning thresholds.

To enable warning alert, set both *threshold=value* and *alert=on*. To disable warning alert, set only *alert=off*. Other cases would cause errors.

Use "cxl list -m \<memdev\> -A" to examine the programming warning threshold capabilities of a device.

## EXAMPLES

Set warning threshold to 30 and enable alert for life used.

```
# cxl set-alert-config mem0 --life-used-threshold=30 --life-used-alert=on
{
  "memdev":"mem0",
  "ram_size":"1024.00 MiB (1073.74 MB)",
  "alert_config":{
    "life_used_prog_warn_threshold_valid":true,
    "dev_over_temperature_prog_warn_threshold_valid":false,
    "dev_under_temperature_prog_warn_threshold_valid":false,
    "corrected_volatile_mem_err_prog_warn_threshold_valid":false,
    "corrected_pmem_err_prog_warn_threshold_valid":false,
    "life_used_prog_warn_threshold_writable":true,
    "dev_over_temperature_prog_warn_threshold_writable":true,
    "dev_under_temperature_prog_warn_threshold_writable":true,
    "corrected_volatile_mem_err_prog_warn_threshold_writable":true,
    "corrected_pmem_err_prog_warn_threshold_writable":true,
    "life_used_crit_alert_threshold":75,
    "life_used_prog_warn_threshold":30,
    "dev_over_temperature_crit_alert_threshold":0,
    "dev_under_temperature_crit_alert_threshold":0,
    "dev_over_temperature_prog_warn_threshold":0,
    "dev_under_temperature_prog_warn_threshold":0,
    "corrected_volatile_mem_err_prog_warn_threshold":0,
    "corrected_pmem_err_prog_warn_threshold":0
  },
  "serial":"0",
  "host":"0000:0d:00.0"
}
cxl memdev: cmd_set_alert_config: set alert configuration 1 mem
```

Disable warning alert for life\_used.

```
# cxl set-alert-config mem0 --life-used-alert=off
{
  "memdev":"mem0",
  "ram_size":"1024.00 MiB (1073.74 MB)",
  "alert_config":{
    "life_used_prog_warn_threshold_valid":false,
    "dev_over_temperature_prog_warn_threshold_valid":false,
    "dev_under_temperature_prog_warn_threshold_valid":false,
    "corrected_volatile_mem_err_prog_warn_threshold_valid":false,
    "corrected_pmem_err_prog_warn_threshold_valid":false,
    "life_used_prog_warn_threshold_writable":true,
    "dev_over_temperature_prog_warn_threshold_writable":true,
    "dev_under_temperature_prog_warn_threshold_writable":true,
    "corrected_volatile_mem_err_prog_warn_threshold_writable":true,
    "corrected_pmem_err_prog_warn_threshold_writable":true,
    "life_used_crit_alert_threshold":75,
    "life_used_prog_warn_threshold":30,
    "dev_over_temperature_crit_alert_threshold":0,
    "dev_under_temperature_crit_alert_threshold":0,
    "dev_over_temperature_prog_warn_threshold":0,
    "dev_under_temperature_prog_warn_threshold":0,
    "corrected_volatile_mem_err_prog_warn_threshold":0,
    "corrected_pmem_err_prog_warn_threshold":0
  },
  "serial":"0",
  "host":"0000:0d:00.0"
}
cxl memdev: cmd_set_alert_config: set alert configuration 1 mem
```

## OPTIONS

\<memory device(s)\>

A *memX* device name, or a memdev id number. Restrict the operation to the specified memdev(s). The keyword *all* can be specified to indicate the lack of any restriction.

- \-S, --serial

  Rather an a memdev id number, interpret the \<memdev\> argument(s) as a list of serial numbers.

\-L, --life-used-threshold=

Set \<value\> for the life used warning alert threshold.

\--life-used-alert=

Enable or disable the life used warning alert. Options are *on* or *off*.

\-O, --over-temperature-threshold=

Set \<value\> for the device over temperature warning alert threshold.

\--over-temperature-alert=

Enable or disable the device over temperature warning alert. Options are *on* or *off*.

\-U, --under-temperature-threshold=

Set \<value\> for the device under temperature warning alert threshold.

\--under-temperature-alert=

Enable or disable the device under temperature warning alert. Options are *on* or *off*.

\-V, --volatile-mem-err-threshold=

Set \<value\> for the corrected volatile memory error warning alert threshold.

\--volatile-mem-err-alert=

Enable or disable the corrected volatile memory error warning alert. Options are *on* or *off*.

\-P, --pmem-err-threshold=

Set \<value\> for the corrected persistent memory error warning alert threshold.

\--pmem-err-alert=

Enable or disable the corrected persistent memory error warning alert. Options are *on* or *off*.

- \-v, --verbose

  Turn on verbose debug messages in the library (if libcxl was built with logging and debug enabled).

## SEE ALSO

CXL-3.0 8.2.9.8.3.3