On Thu, Mar 1, 2012 at 4:23 PM, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote: > On Sat, 25 Feb 2012, Clark Williams wrote: > >> Thomas, >> >> I just saw the following traceback on my laptop running 3.2.7-rt13: >> >> [32943.463901] Modules linked in: tun vfat fat usb_storage uas tcp_lp >> ppdev parport_pc lp parport fuse be2iscsi iscsi_boot_sysfs bnx2i cnic >> uio cxgb4i cxgb4 lockd cxgb3i libcxgbi cxgb3 mdio iscsi_tcp >> libiscsi_tcp libiscsi scsi_transport_iscsi rfcomm bnep >> nf_conntrack_ipv4 ip6t_REJECT nf_defrag_ipv4 nf_conntrack_ipv6 >> nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables >> snd_hda_codec_hdmi arc4 snd_hda_codec_conexant iwlwifi snd_hda_intel >> snd_hda_codec btusb bluetooth snd_hwdep mac80211 snd_seq uvcvideo >> snd_seq_device snd_pcm thinkpad_acpi snd_timer videodev snd cfg80211 >> e1000e i7core_edac media v4l2_compat_ioctl32 xhci_hcd edac_core >> i2c_i801 snd_page_alloc rfkill iTCO_wdt pcspkr iTCO_vendor_support >> soundcore microcode uinput sunrpc ipv6 sdhci_pci sdhci mmc_core >> ehci_hcd nouveau ttm drm_kms_helper drm i2c_algo_bit i2c_core mxm_wmi >> wmi video [last unloaded: scsi_wait_scan] [32943.463949] Pid: 63, comm: >> irq/9-acpi Tainted: G W 3.2.7-rt13+ #40 [32943.463951] Call >> Trace: [32943.463958] [<ffffffff815ca1b8>] __schedule_bug+0x5e/0x62 >> [32943.463963] [<ffffffff815dedcd>] __schedule+0x6ed/0x760 >> [32943.463966] [<ffffffff815df27e>] schedule+0x2e/0xa0 [32943.463970] >> [<ffffffff815e0951>] rt_spin_lock_slowlock+0x150/0x1ef [32943.463975] >> [<ffffffff81056d01>] ? check_same_owner+0x31/0x80 [32943.463978] >> [<ffffffff815e0ee6>] rt_spin_lock+0x26/0x30 [32943.463983] >> [<ffffffff81160cdc>] kmem_cache_alloc_trace+0x6c/0x320 [32943.463987] >> [<ffffffff8135a307>] ? acpi_hw_write_port+0x43/0x98 [32943.463991] >> [<ffffffff81346714>] ? acpi_ec_sync_query+0x102/0x102 [32943.463995] >> [<ffffffff81340fcd>] __acpi_os_execute+0x35/0xc6 [32943.463998] >> [<ffffffff8134106e>] acpi_os_execute+0x10/0x12 [32943.464001] >> [<ffffffff81346e1f>] acpi_ec_gpe_handler+0xad/0xb6 [32943.464004] >> [<ffffffff81351baa>] acpi_ev_gpe_dispatch+0xc5/0x13e [32943.464007] >> [<ffffffff81351cd8>] acpi_ev_gpe_detect+0xb5/0x10d [32943.464012] >> [<ffffffff810d7560>] ? irq_thread_fn+0x50/0x50 [32943.464015] >> [<ffffffff813502a6>] acpi_ev_sci_xrupt_handler+0x22/0x2b >> [32943.464017] [<ffffffff81341086>] acpi_irq+0x16/0x31 [32943.464020] >> [<ffffffff810d758e>] irq_forced_thread_fn+0x2e/0x70 [32943.464023] >> [<ffffffff810d748a>] irq_thread+0x17a/0x200 [32943.464026] >> [<ffffffff810d7310>] ? irq_finalize_oneshot+0x20/0x20 [32943.464030] >> [<ffffffff81094578>] kthread+0x98/0xa0 [32943.464034] >> [<ffffffff815e9d74>] kernel_thread_helper+0x4/0x10 [32943.464037] >> [<ffffffff810944e0>] ? __init_kthread_worker+0x70/0x70 [32943.464040] >> [<ffffffff815e9d70>] ? gs_change+0x13/0x13 >> >> >> I'll dig into it a bit more but my guess is that it was something >> battery releated (I'd accidentally kicked the power cord out at a >> coffee shop and noticed that I was down to 28% battery, when I then >> noticed that I had a traceback). > > That's a known issue and has been reported over and over. That's due > to making the acpi locks raw. Now I can't find any bug report which > tells me WHY the heck we made those locks raw in the first place. All > I can remember is that the trace back came deep from the idle code. > > That's why I asked to revert the > > acpi-make-gbl-hardware-lock-raw.patch > acpi-make-ec-lock-raw-as-well.patch > > patches, so we can get that information. > > It might be a non issue on 3.2 and only a 3.0 problem, but as I can't > find anything I'm going to drop those patches from the next 3.2 > release and wait for proper bugreports coming again :) > FWIW I believe the latter comes from here: https://lkml.org/lkml/2011/12/3/53 Thanks John -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
