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    SubjectKernel BUG during suspend to disk with 2.6.32-rc8-git3
    Using the mainline kernel git describe == v2.6.32-rc8-259-g2127816),
    I get the following BUG and WARNING:

    ================================
    BUG: sleeping function called from invalid context at
    drivers/acpi/acpica/psloop.c:826
    in_atomic(): 0, irqs_disabled(): 1, pid: 3616, name: s2disk

    1 lock held by s2disk/3616:

    #0: (pm_mutex){+.+.+.}, at: [<ffffffff8106ee46>]
    snapshot_ioctl+0x52/0x4ba
    irq event stamp: 742026

    hardirqs last enabled at (742025): [<ffffffff8125af88>]
    __mutex_unlock_slowpath+0x100/0x10b
    hardirqs last disabled at (742026): [<ffffffff8106c22e>]
    hibernation_snapshot+0xa0/0x1be
    softirqs last enabled at (741898): [<ffffffff81041936>]
    __do_softirq+0x127/0x13d
    softirqs last disabled at (741877): [<ffffffff8100cb7c>]
    call_softirq+0x1c/0x28
    Pid: 3616, comm: s2disk Not tainted
    2.6.32-rc8-Linus-00259-g2127816-dirty #127
    Call Trace:

    [<ffffffff8105c810>] ? print_irqtrace_events+0xd0/0xd4
    [<ffffffff81033ff9>] __might_sleep+0xef/0xf4
    [<ffffffff81181a9c>] acpi_ps_complete_op+0x2bc/0x2d6
    [<ffffffff8116baa5>] ? acpi_ds_exec_end_op+0x54d/0x570
    [<ffffffff81182378>] acpi_ps_parse_loop+0x8c2/0xa4e
    [<ffffffff8105da14>] ? trace_hardirqs_off+0xd/0xf
    [<ffffffff810ae5ed>] ? kmem_cache_alloc+0x10e/0x147
    [<ffffffff81181291>] acpi_ps_parse_aml+0x10a/0x3e1
    [<ffffffff81189073>] ? acpi_ut_create_internal_object_dbg+0x22/0x87
    [<ffffffff81182ca0>] acpi_ps_execute_method+0x22a/0x336
    [<ffffffff8117d490>] acpi_ns_evaluate+0x18c/0x2c9
    [<ffffffff81184230>] acpi_rs_set_srs_method_data+0xdd/0x105
    [<ffffffff81183cfd>] acpi_set_current_resources+0x37/0x45
    [<ffffffff81166229>] acpi_pci_link_set+0x128/0x222
    [<ffffffff810533ab>] ? hres_timers_resume+0x3f/0x41
    [<ffffffff81166356>] irqrouter_resume+0x33/0x4b
    [<ffffffff811b5dc9>] __sysdev_resume+0x20/0xc0
    [<ffffffff811b5ecc>] sysdev_resume+0x63/0xa4
    [<ffffffff8106c29f>] hibernation_snapshot+0x111/0x1be
    [<ffffffff8106f01d>] snapshot_ioctl+0x229/0x4ba
    [<ffffffff8105e9bc>] ? trace_hardirqs_on_caller+0x10c/0x130
    [<ffffffff810c0451>] vfs_ioctl+0x1d/0x82
    [<ffffffff810c09b0>] do_vfs_ioctl+0x483/0x4c9
    [<ffffffff810b4d9e>] ? fget_light+0xdd/0xeb
    [<ffffffff810b4d13>] ? fget_light+0x52/0xeb
    [<ffffffff810c0a38>] sys_ioctl+0x42/0x65
    [<ffffffff8100b9eb>] system_call_fastpath+0x16/0x1b
    ------------[ cut here ]------------

    WARNING: at drivers/base/sys.c:353 __sysdev_resume+0x4f/0xc0()
    Hardware name: HP Pavilion dv2700 Notebook PC
    Interrupts enabled after irqrouter_resume+0x0/0x4b
    Modules linked in: aes_x86_64 aes_generic af_packet xt_tcpudp xt_pkttype
    ipt_LOG xt_limit snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device edd
    nfs lockd nfs_acl auth_rpcgss sunrpc cpufreq_conservative
    cpufreq_userspace cpufreq_powersave powernow_k8 xt_NOTRACK ipt_REJECT
    xt_state iptable_raw iptable_filter nf_conntrack_netbios_ns
    nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables fuse
    ext3 jbd loop dm_mod snd_hda_codec_conexant arc4 ecb b43 snd_hda_intel
    mac80211 cfg80211 snd_hda_codec rfkill snd_pcm uvcvideo led_class
    videodev snd_timer v4l1_compat snd i2c_nforce2 v4l2_compat_ioctl32
    ide_cd_mod k8temp soundcore ssb serio_raw ac battery hwmon joydev sg
    forcedeth snd_page_alloc button i2c_core cdrom ext4 mbcache jbd2 crc16
    sd_mod ahci ohci_hcd libata scsi_mod ehci_hcd usbcore fan processor
    ide_pci_generic amd74xx ide_core thermal
    Pid: 3616, comm: s2disk Not tainted
    2.6.32-rc8-Linus-00259-g2127816-dirty #127
    Call Trace:

    [<ffffffff8103c789>] warn_slowpath_common+0x77/0x8f
    [<ffffffff8103c7ee>] warn_slowpath_fmt+0x3c/0x3e
    [<ffffffff81166323>] ? irqrouter_resume+0x0/0x4b
    [<ffffffff811b5df8>] __sysdev_resume+0x4f/0xc0
    [<ffffffff811b5ecc>] sysdev_resume+0x63/0xa4
    [<ffffffff8106c29f>] hibernation_snapshot+0x111/0x1be
    [<ffffffff8106f01d>] snapshot_ioctl+0x229/0x4ba
    [<ffffffff8105e9bc>] ? trace_hardirqs_on_caller+0x10c/0x130
    [<ffffffff810c0451>] vfs_ioctl+0x1d/0x82
    [<ffffffff810c09b0>] do_vfs_ioctl+0x483/0x4c9
    [<ffffffff810b4d9e>] ? fget_light+0xdd/0xeb
    [<ffffffff810b4d13>] ? fget_light+0x52/0xeb
    [<ffffffff810c0a38>] sys_ioctl+0x42/0x65
    [<ffffffff8100b9eb>] system_call_fastpath+0x16/0x1b
    ---[ end trace 2db18c3096add170 ]---
    ==============================

    I do not know if this is a regression, as I just recently tried hibernation.

    The system has x86_64 architecture. The source is "dirty" due to a local
    modification of the rtl8187 driver, which is not even loaded.

    If additional info is needed, please ask.

    Larry



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