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