On Fri, Nov 13, 2020 at 2:26 PM Greg Kroah-Hartman <gre...@linuxfoundation.org> wrote: > > On Fri, Oct 23, 2020 at 02:04:17PM +0800, Joseph Jang wrote: > > Since dpm_watchdog just cover device power management, we proposed to > > move it to core power suspend.c to cover not only device power management > > hang issues, but also core power management hand issues. > > > > Since dpm_watchdog stands for device pm, we propose to use new name sleep > > timer and new timeout handler to cover more sleep hang issues. The new > > timeout handler will dump disk sleep task at first round timeout and > > trigger kernel panic at second round timeout. > > The default timer for each round is defined in > > CONFIG_PM_SLEEP_TIMER_TIMEOUT. > > > > Signed-off-by: Joseph Jang <josephj...@google.com> > > It still seems odd you can't use a watchdog for this, as you really have > just implemented the same thing here, but "open coded" the logic. > > I'll let Rafael chime in here too, as he knows this area much better > than I as to if this is viable or not.
It is viable AFAICS. Just make the existing thing work with dev == NULL and use it as needed.
