Bug 519536
| Summary: | possible circular locking, kacpi_hotplug in flush_workqueue and worker_thread | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Mads Kiilerich <mads> |
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
| Status: | CLOSED WORKSFORME | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 12 | CC: | itamar, jglisse, kernel-maint |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2010-01-13 23:04:27 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
The kernel version is bit strange what is the output of uname -a and rpm -q ? Sorry missed that date at which point you did the test. Do you still have this issue with a more recent kernel ? If so please gives us kernel version (rpm -q kernel). Thanks. This bug appears to have been reported against 'rawhide' during the Fedora 12 development cycle. Changing version to '12'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping With kernel-PAE-2.6.31.6-145.fc12.i686 nomodeset resume doesn't get as far as this issue. Resuming turns the display on, but nothing is written to /var/log/messages, apparently no disc activity, no reaction to caps-lock, ctrl-alt-f2 ctrl-alt-del does nothing, only a hard power off works. This current problem is covered by bug 521161, so perhaps this issue should be closed? Suspend/resume works for me with 2.6.32 and KMS, and this report is old and it seems like it is of no use, so I will close it. |
Description of problem: resume after suspend failed and I noticed this in the messages from suspend but syslogged on resume: Aug 27 01:56:43 localhost kernel: PM: Syncing filesystems ... done. Aug 27 01:56:43 localhost kernel: Freezing user space processes ... (elapsed 0.00 seconds) done. Aug 27 01:56:43 localhost kernel: Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done. Aug 27 01:56:43 localhost kernel: Suspending console(s) (use no_console_suspend to debug) Aug 27 01:56:43 localhost kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache Aug 27 01:56:43 localhost kernel: sd 0:0:0:0: [sda] Stopping disk Aug 27 01:56:43 localhost kernel: eth1: Going into suspend... Aug 27 01:56:43 localhost kernel: ipw2200 0000:03:03.0: PCI INT A disabled Aug 27 01:56:43 localhost kernel: pci 0000:01:00.0: PCI INT A disabled Aug 27 01:56:43 localhost kernel: ata_piix 0000:00:1f.2: PCI INT B disabled Aug 27 01:56:43 localhost kernel: Intel ICH 0000:00:1e.2: PCI INT A disabled Aug 27 01:56:43 localhost kernel: ehci_hcd 0000:00:1d.7: PCI INT A disabled Aug 27 01:56:43 localhost kernel: uhci_hcd 0000:00:1d.3: PCI INT D disabled Aug 27 01:56:43 localhost kernel: uhci_hcd 0000:00:1d.2: PCI INT C disabled Aug 27 01:56:43 localhost kernel: uhci_hcd 0000:00:1d.1: PCI INT B disabled Aug 27 01:56:43 localhost kernel: uhci_hcd 0000:00:1d.0: PCI INT A disabled Aug 27 01:56:43 localhost kernel: PM: suspend devices took 1.208 seconds Aug 27 01:56:43 localhost kernel: ehci_hcd 0000:00:1d.7: PME# disabled Aug 27 01:56:43 localhost kernel: ACPI: Preparing to enter system sleep state S3 Aug 27 01:56:43 localhost kernel: Disabling non-boot CPUs ... Aug 27 01:56:43 localhost kernel: ACPI: Waking up from system sleep state S3 Aug 27 01:56:43 localhost kernel: ehci_hcd 0000:00:1d.7: PME# disabled Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: ======================================================= Aug 27 01:56:43 localhost kernel: [ INFO: possible circular locking dependency detected ] Aug 27 01:56:43 localhost kernel: 2.6.31-0.174.rc7.git2.fc12.i686.PAE #1 Aug 27 01:56:43 localhost kernel: ------------------------------------------------------- Aug 27 01:56:43 localhost kernel: kacpi_hotplug/15 is trying to acquire lock: Aug 27 01:56:43 localhost kernel: (kacpid){+.+.+.}, at: [<c0461413>] flush_workqueue+0x0/0xab Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: but task is already holding lock: Aug 27 01:56:43 localhost kernel: (&dpc->work){+.+.+.}, at: [<c0460844>] worker_thread+0x152/0x275 Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: which lock already depends on the new lock. Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: the existing dependency chain (in reverse order) is: Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: -> #1 (&dpc->work){+.+.+.}: Aug 27 01:56:43 localhost kernel: [<c0479733>] __lock_acquire+0x9b3/0xb25 Aug 27 01:56:43 localhost kernel: [<c047995c>] lock_acquire+0xb7/0xeb Aug 27 01:56:43 localhost kernel: [<c0460880>] worker_thread+0x18e/0x275 Aug 27 01:56:43 localhost kernel: [<c0465459>] kthread+0x7b/0x80 Aug 27 01:56:43 localhost kernel: [<c040af3f>] kernel_thread_helper+0x7/0x10 Aug 27 01:56:43 localhost kernel: [<ffffffff>] 0xffffffff Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: -> #0 (kacpid){+.+.+.}: Aug 27 01:56:43 localhost kernel: [<c047963a>] __lock_acquire+0x8ba/0xb25 Aug 27 01:56:43 localhost kernel: [<c047995c>] lock_acquire+0xb7/0xeb Aug 27 01:56:43 localhost kernel: [<c046146b>] flush_workqueue+0x58/0xab Aug 27 01:56:43 localhost kernel: [<c064de28>] acpi_os_wait_events_complete+0x20/0x3d Aug 27 01:56:43 localhost kernel: [<c064de7a>] acpi_os_execute_hp_deferred+0x35/0x5a Aug 27 01:56:43 localhost kernel: [<c0460886>] worker_thread+0x194/0x275 Aug 27 01:56:43 localhost kernel: [<c0465459>] kthread+0x7b/0x80 Aug 27 01:56:43 localhost kernel: [<c040af3f>] kernel_thread_helper+0x7/0x10 Aug 27 01:56:43 localhost kernel: [<ffffffff>] 0xffffffff Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: other info that might help us debug this: Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: 2 locks held by kacpi_hotplug/15: Aug 27 01:56:43 localhost kernel: #0: (kacpi_hotplug){+.+...}, at: [<c0460844>] worker_thread+0x152/0x275 Aug 27 01:56:43 localhost kernel: #1: (&dpc->work){+.+.+.}, at: [<c0460844>] worker_thread+0x152/0x275 Aug 27 01:56:43 localhost kernel: Aug 27 01:56:43 localhost kernel: stack backtrace: Aug 27 01:56:43 localhost kernel: Pid: 15, comm: kacpi_hotplug Not tainted 2.6.31-0.174.rc7.git2.fc12.i686.PAE #1 Aug 27 01:56:43 localhost kernel: Call Trace: Aug 27 01:56:43 localhost kernel: [<c083701e>] ? printk+0x22/0x3c Aug 27 01:56:43 localhost kernel: [<c0478a68>] print_circular_bug_tail+0x68/0x84 Aug 27 01:56:43 localhost kernel: [<c047963a>] __lock_acquire+0x8ba/0xb25 Aug 27 01:56:43 localhost kernel: [<c047995c>] lock_acquire+0xb7/0xeb Aug 27 01:56:43 localhost kernel: [<c0461413>] ? flush_workqueue+0x0/0xab Aug 27 01:56:43 localhost kernel: [<c0461413>] ? flush_workqueue+0x0/0xab Aug 27 01:56:43 localhost kernel: [<c046146b>] flush_workqueue+0x58/0xab Aug 27 01:56:43 localhost kernel: [<c0461413>] ? flush_workqueue+0x0/0xab Aug 27 01:56:43 localhost kernel: [<c064de28>] acpi_os_wait_events_complete+0x20/0x3d Aug 27 01:56:43 localhost kernel: [<c064de7a>] acpi_os_execute_hp_deferred+0x35/0x5a Aug 27 01:56:43 localhost kernel: [<c0460886>] worker_thread+0x194/0x275 Aug 27 01:56:43 localhost kernel: [<c0460844>] ? worker_thread+0x152/0x275 Aug 27 01:56:43 localhost kernel: [<c064de45>] ? acpi_os_execute_hp_deferred+0x0/0x5a Aug 27 01:56:43 localhost kernel: [<c04657b6>] ? autoremove_wake_function+0x0/0x55 Aug 27 01:56:43 localhost kernel: [<c04606f2>] ? worker_thread+0x0/0x275 Aug 27 01:56:43 localhost kernel: [<c0465459>] kthread+0x7b/0x80 Aug 27 01:56:43 localhost kernel: [<c04653de>] ? kthread+0x0/0x80 Aug 27 01:56:43 localhost kernel: [<c040af3f>] kernel_thread_helper+0x7/0x10 Are these messages related to the failing resume? Version-Release number of selected component (if applicable): kernel-PAE-2.6.31-0.174.rc7.git2.fc12.i686