Re: [PlanetCCRMA] Re: 2.6.22.6 + rt9: suspend/hibernate not working

[Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>]

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On Thu, 2007-09-06 at 12:55 -0700, Fernando Lopez-Lezcano wrote:
> On Thu, 2007-09-06 at 11:42 -0700, Fernando Lopez-Lezcano wrote:
> > On Tue, 2007-09-04 at 17:15 -0700, Daniel Walker wrote:
> > > On Tue, 2007-09-04 at 17:12 -0700, Fernando Lopez-Lezcano wrote:
> > > > Hi Ingo... I'm getting reports from some of my Planet CCRMA users (which
> > > > I confirmed) that the latest rt kernel I released has broken suspend
> > > > (tested on fc6 & fc7, stock Fedora kernel works fine - the rt
> > > > configuration files are virtual clones as far as possible of the
> > > > standard Fedora kernel config files). 
> > > > 
> > > > I don't know where to start debugging this. When suspend is initiated it
> > > > freezes with a "Stopping tasks ... " message in the text console - a
> > > > hard power cycle is the only way to get the machine back to normal. 
> > > > 
> > > > kernel/power/process.c seems to contain that string in the
> > > > freeze_processes function so it looks like the freezer is not freezing
> > > > tasks as no "done" message is ever printed. 
> > > > 
> > > > What could we do to help?
> > > 
> > > If you have high resolution timers enabled you could try disabling it,
> > > and see if the problem persists .
> > 
> > The problem is still there ("Stopping tasks ... " and nothing
> > afterwards). 
> 
> Looks like it was a known problem (sorry about the noise), see:
>   http://lkml.org/lkml/2007/8/25/117
> 
> It does fix the problem here as well. 
> Ingo: is this still the right fix for 2.6.22.6 + rt9?

I'm seeing this while going into suspend:

...
Disabling non-boot CPUs ...
Breaking affinity for irq 218
CPU 1 is now offline
SMP alternatives: switching to UP code
BUG: sleeping function called from invalid context pm-suspend(3676) at
kernel/rtmutex.c:636
in_atomic():0 [00000000], irqs_disabled():1
 [<c061c13d>] __rt_spin_lock+0x21/0x3d
 [<c0461b2c>] free_pages_bulk+0x28/0x188
 [<c042653d>] migration_call+0x3a5/0x3be
 [<c0461cd4>] __drain_pages+0x48/0x69
 [<c0461d0a>] page_alloc_cpu_notify+0x15/0x2b
 [<c061e083>] notifier_call_chain+0x2a/0x47
 [<c0435fe8>] raw_notifier_call_chain+0x17/0x1a
 [<c0446869>] _cpu_down+0x17a/0x238
 [<c042b4e5>] printk+0x1f/0x92
 [<c0446ad0>] disable_nonboot_cpus+0x4e/0xd2
 [<c044b673>] enter_state+0x116/0x1d6
 [<c044b831>] state_store+0xc9/0xe0
 [<c044b768>] state_store+0x0/0xe0
 [<c04b44cf>] subsys_attr_store+0x27/0x2b
 [<c04b45db>] sysfs_write_file+0x9a/0xbd
 [<c04b4541>] sysfs_write_file+0x0/0xbd
 [<c047bc97>] vfs_write+0xa8/0x15a
 [<c047c2c0>] sys_write+0x41/0x67
 [<c0404ef6>] syscall_call+0x7/0xb
 =======================
CPU1 is down
PM: Entering mem sleep
thinkpad_acpi thinkpad_acpi: LATE suspend
...

I'm attaching the whole compressed dmesg output to put it in context.
-- Fernando


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