diff options
| author |   Douglas Anderson <dianders@chromium.org> | 2025-01-09 12:59:58 -0800 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-01-14 21:23:57 +0100 |
| commit | 56cabb937f8f6091c231bdbc17c0d0a10130fb5d (patch) | |
| tree | 57180784bb7f1b70b16500e30bcb67ad6b4c15da /kernel | |
| parent | PM: sleep: convert comment from kernel-doc to plain comment (diff) | |
| download | wireguard-linux-56cabb937f8f6091c231bdbc17c0d0a10130fb5d.tar.xz wireguard-linux-56cabb937f8f6091c231bdbc17c0d0a10130fb5d.zip | |
PM: sleep: Allow configuring the DPM watchdog to warn earlier than panic
Allow configuring the DPM watchdog to warn about slow suspend/resume
functions without causing a system panic(). This allows you to set the
DPM_WATCHDOG_WARNING_TIMEOUT to something like 5 or 10 seconds to get
warnings about slow suspend/resume functions that eventually succeed.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Link: https://patch.msgid.link/20250109125957.v2.1.I4554f931b8da97948f308ecc651b124338ee9603@changeid
[ rjw: Subject edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/Kconfig | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index afce8130d8b9..ca947ed32e3d 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -257,11 +257,30 @@ config DPM_WATCHDOG boot session. config DPM_WATCHDOG_TIMEOUT - int "Watchdog timeout in seconds" + int "Watchdog timeout to panic in seconds" range 1 120 default 120 depends on DPM_WATCHDOG +config DPM_WATCHDOG_WARNING_TIMEOUT + int "Watchdog timeout to warn in seconds" + range 1 DPM_WATCHDOG_TIMEOUT + default DPM_WATCHDOG_TIMEOUT + depends on DPM_WATCHDOG + help + If the DPM watchdog warning timeout and main timeout are + different then a non-fatal warning (with a stack trace of + the stuck suspend routine) will be printed when the warning + timeout expires. If the suspend routine gets un-stuck + before the main timeout expires then no other action is + taken. If the routine continues to be stuck and the main + timeout expires then an emergency-level message and stack + trace will be printed and the system will panic. + + If the warning timeout is equal to the main timeout (the + default) then the warning will never happen and the system + will jump straight to panic when the main timeout expires. + config PM_TRACE bool help |