linux-kernel - Re: Machine crashes right *after* ~successful resume

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Date:	Tue, 21 Oct 2014 16:15:07 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Wilmer van der Gaast <wilmer@...st.net>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Pavel Machek <pavel@....cz>,
	Rafael Wysocki <rafael.j.wysocki@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Machine crashes right *after* ~successful resume

On Tue, Oct 21, 2014 at 2:40 PM, Wilmer van der Gaast <wilmer@...st.net> wrote:
> Hello,
>
> Sorry for the delay, finally poked at this again. It looks like the
> no_console_suspend flag was causing troubles, which I didn't really need
> anyway with logging going to my serial port.
>
> This is what I get now on the failing resume:
>
> [  112.879390] PM: resume of devices complete after 2239.905 msecs
> [  112.880068] r8169 0000:07:00.0 eth0: link up
> [  112.880078] Switched to clocksource hpet
> [  116.069248] PM: Finishing wakeup.
> [  116.072574] Restarting tasks ... done.
> [  116.076664] PM: calling nb rcu_pm_notify+0x0/0x60
> [  116.081439] PM: ... nb rcu_pm_notify+0x0/0x60 done
> [  116.086267] PM: calling nb cpu_hotplug_pm_callback+0x0/0x50
> [  116.088526] systemd[1]: Got notification message for unit
> systemd-journald.service
> [  116.099442] PM: ... nb cpu_hotplug_pm_callback+0x0/0x50 done
> [  116.105099] PM: calling nb fw_pm_notify+0x0/0x150
> [  116.109812] PM: ... nb fw_pm_notify+0x0/0x150 done
> [  116.114623] PM: calling nb bsp_pm_callback+0x0/0x50
> [  116.119504] PM: ... nb bsp_pm_callback+0x0/0x50 done
>
> And then nothing, and it's hung. Looks the same to me (apart from the tsc
> issues + hpet switch) as a successful resume:

then it stuck in pm_restore_console()?

Please check attached debut patch.

Thanks

Yinghai

View attachment "debug_suspend_resume_y.patch" of type "text/x-patch" (1770 bytes)