Re: PM regression in next
- Date: Fri, 12 Jan 2018 13:23:54 +0100
- From: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
- Subject: Re: PM regression in next
On Friday, January 12, 2018 2:32:57 AM CET Tony Lindgren wrote:
> * Tony Lindgren <tony@xxxxxxxxxxx> [180111 17:20]:
> > Well I tried to measure suspend power consumption and noticed
> > that system suspend fails too hand hangs the network device:
> > # echo mem > /sys/power/state
> > [ 32.577850] PM: suspend entry (deep)
> > [ 32.582031] PM: Syncing filesystems ... done.
> > [ 32.598083] Freezing user space processes ... (elapsed 0.002 seconds) done.
> > [ 32.608398] OOM killer disabled.
> > [ 32.611846] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done.
> > [ 32.622192] Suspending console(s) (use no_console_suspend to debug)
> > [ 32.651123] dpm_run_callback(): mdio_bus_suspend+0x0/0x24 returns 4352
> > [ 32.651428] PM: Device 2c000000.ethernet-ffffffff:01 failed to suspend: error 4352
This looks totally bogus.
First, "error" should be a negative number and we print it as int.
Second, error codes are not in this range anyway.
> > [ 32.653289] PM: Some devices failed to suspend, or early wake event detected
> > [ 32.685455] OOM killer enabled.
> > [ 32.688629] Restarting tasks ... done.
> > [ 32.695983] PM: suspend exit
> > ash: write error: Bad address
> > That too works just fine at commit 70286688e5ad.
> Suspend fails at commit e2d7fe89e8ae though, so looks like we
> have two separate issues. I'll try to bisect that separately.
BTW, can you please CC PM bug reports to linux-pm? That may help sometimes.