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Notify the user (at kern.emerg) that the system will be shutting down if

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it is still above the critical temperature on the next poll cycle.  This
is a 10 second advance notice by default.  Document the private
(non-standard) notify we will be using with devd(8).
This commit is contained in:
njl 2004-02-03 04:18:56 +00:00
parent 64a45034e6
commit 18d94b8db0
3 changed files with 27 additions and 6 deletions
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10
etc/devd.conf
View File

@ -77,6 +77,16 @@ notify 10 {
action "/etc/rc.d/power_profile $notify";
};
# Notify all users before beginning emergency shutdown when we get
# a _CRT or _HOT thermal event and we're going to power down the system
# very soon.
notify 10 {
match "system" "ACPI";
match "subsystem" "Thermal";
match "notify" "0xcc";
action "logger -p kern.emerg 'WARNING: system temperature too high, shutting down soon!'";
};
/* EXAMPLES TO END OF FILE
# The following might be an example of something that a vendor might

3
share/man/man4/acpi_thermal.4
View File

@ -115,6 +115,9 @@ Current temperature has changed.
One or more trip points (_ACx, _PSV) have changed.
.It Li 0x82
One or more device lists (_ALx, _PSL, _TZD) have changed.
.It Li 0xcc
Non-standard notify that the system will shutdown if the temperature
stays above _CRT or _HOT for one more poll cycle.
.El
.El
.Sh SEE ALSO

18
sys/dev/acpica/acpi_thermal.c
View File

@ -49,9 +49,10 @@ ACPI_MODULE_NAME("THERMAL")
#define TZ_ZEROC 2732
#define TZ_KELVTOC(x) (((x) - TZ_ZEROC) / 10), (((x) - TZ_ZEROC) % 10)
#define TZ_NOTIFY_TEMPERATURE 0x80
#define TZ_NOTIFY_LEVELS 0x81
#define TZ_NOTIFY_DEVICES 0x82
#define TZ_NOTIFY_TEMPERATURE 0x80 /* Temperature changed. */
#define TZ_NOTIFY_LEVELS 0x81 /* Cooling levels changed. */
#define TZ_NOTIFY_DEVICES 0x82 /* Device lists changed. */
#define TZ_NOTIFY_CRITICAL 0xcc /* Fake notify that _CRT/_HOT reached. */
/* Check for temperature changes every 10 seconds by default */
#define TZ_POLLRATE 10
@ -59,6 +60,9 @@ ACPI_MODULE_NAME("THERMAL")
/* Make sure the reported temperature is valid for this number of polls. */
#define TZ_VALIDCHECKS 3
/* Notify the user we will be shutting down in one more poll cycle. */
#define TZ_NOTIFYCOUNT (TZ_VALIDCHECKS - 1)
/* ACPI spec defines this */
#define TZ_NUMLEVELS 10
struct acpi_tz_zone {
@ -481,14 +485,18 @@ acpi_tz_monitor(void *Context)
* for one poll cycle. It is suspected this is due to the embedded
* controller timing out. A typical value is 138C for one cycle on
* a system that is otherwise 65C.
*
* If we're almost at that threshold, notify the user through devd(8).
*/
if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0) {
if (++sc->tz_validchecks == TZ_VALIDCHECKS) {
sc->tz_validchecks++;
if (sc->tz_validchecks == TZ_VALIDCHECKS) {
device_printf(sc->tz_dev,
"WARNING - current temperature (%d.%dC) exceeds safe limits\n",
TZ_KELVTOC(sc->tz_temperature));
shutdown_nice(RB_POWEROFF);
}
} else if (sc->tz_validchecks == TZ_NOTIFYCOUNT)
acpi_UserNotify("Thermal", sc->tz_handle, TZ_NOTIFY_CRITICAL);
} else {
sc->tz_validchecks = 0;
}