Bug 729904
| Summary: | INFO: possible recursive locking detected - btrfs | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Matthias Runge <mrunge> |
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
| Status: | CLOSED DUPLICATE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 16 | CC: | aquini, gansalmon, itamar, jbacik, jonathan, jwboyer, kernel-maint, madhu.chinakonda |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-09-06 15:38:00 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: | |||
*** This bug has been marked as a duplicate of bug 731361 *** |
Description of problem: Aug 11 06:38:12 localhost kernel: [ 2464.037255] Aug 11 06:38:12 localhost kernel: [ 2464.037258] ============================================= Aug 11 06:38:12 localhost kernel: [ 2464.038052] [ INFO: possible recursive locking detected ] Aug 11 06:38:12 localhost kernel: [ 2464.038052] 3.0.1-3.fc16.i686.PAE #1 Aug 11 06:38:12 localhost kernel: [ 2464.038052] --------------------------------------------- Aug 11 06:38:12 localhost kernel: [ 2464.038052] updatedb/30000 is trying to acquire lock: Aug 11 06:38:12 localhost kernel: [ 2464.038052] (&(&eb->lock)->rlock){+.+...}, at: [<f7b5340c>] btrfs_try_spin_lock+0x20/0x6f [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] Aug 11 06:38:12 localhost kernel: [ 2464.038052] but task is already holding lock: Aug 11 06:38:12 localhost kernel: [ 2464.038052] (&(&eb->lock)->rlock){+.+...}, at: [<f7b533e4>] btrfs_clear_lock_blocking+0x1a/0x22 [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] Aug 11 06:38:12 localhost kernel: [ 2464.038052] other info that might help us debug this: Aug 11 06:38:12 localhost kernel: [ 2464.038052] Possible unsafe locking scenario: Aug 11 06:38:12 localhost kernel: [ 2464.038052] Aug 11 06:38:12 localhost kernel: [ 2464.038052] CPU0 Aug 11 06:38:12 localhost kernel: [ 2464.038052] ---- Aug 11 06:38:12 localhost kernel: [ 2464.038052] lock(&(&eb->lock)->rlock); Aug 11 06:38:12 localhost kernel: [ 2464.038052] lock(&(&eb->lock)->rlock); Aug 11 06:38:12 localhost kernel: [ 2464.038052] Aug 11 06:38:12 localhost kernel: [ 2464.038052] *** DEADLOCK *** Aug 11 06:38:12 localhost kernel: [ 2464.038052] Aug 11 06:38:12 localhost kernel: [ 2464.038052] May be due to missing lock nesting notation Aug 11 06:38:12 localhost kernel: [ 2464.038052] Aug 11 06:38:12 localhost kernel: [ 2464.038052] 2 locks held by updatedb/30000: Aug 11 06:38:12 localhost kernel: [ 2464.038052] #0: (&sb->s_type->i_mutex_key#13){+.+.+.}, at: [<c0512762>] vfs_readdir+0x4d/0x91 Aug 11 06:38:12 localhost kernel: [ 2464.038052] #1: (&(&eb->lock)->rlock){+.+...}, at: [<f7b533e4>] btrfs_clear_lock_blocking+0x1a/0x22 [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] Aug 11 06:38:12 localhost kernel: [ 2464.038052] stack backtrace: Aug 11 06:38:12 localhost kernel: [ 2464.038052] Pid: 30000, comm: updatedb Not tainted 3.0.1-3.fc16.i686.PAE #1 Aug 11 06:38:12 localhost kernel: [ 2464.038052] Call Trace: Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c084512a>] ? printk+0x2d/0x2f Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c04731d7>] __lock_acquire+0x805/0xb57 Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<f7b5340c>] ? btrfs_try_spin_lock+0x20/0x6f [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c047393d>] lock_acquire+0xad/0xe4 Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<f7b5340c>] ? btrfs_try_spin_lock+0x20/0x6f [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c084d915>] _raw_spin_lock+0x3b/0x68 Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<f7b5340c>] ? btrfs_try_spin_lock+0x20/0x6f [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<f7b5340c>] btrfs_try_spin_lock+0x20/0x6f [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<f7b10b6c>] btrfs_search_slot+0x330/0x436 [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<f7b6497d>] ? btrfs_get_delayed_node+0xb2/0xbc [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<f7b29519>] btrfs_real_readdir+0x20d/0x4ed [btrfs] Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c05124c8>] ? sys_ioctl+0x6a/0x6a Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c0473cda>] ? trace_hardirqs_on_caller+0xfe/0x11f Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c084cb00>] ? __mutex_lock_common+0x2e4/0x2ee Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c0512762>] ? vfs_readdir+0x4d/0x91 Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c084cb96>] ? mutex_lock_killable_nested+0x43/0x49 Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c0512781>] vfs_readdir+0x6c/0x91 Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c05124c8>] ? sys_ioctl+0x6a/0x6a Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c051290a>] sys_getdents64+0x66/0xa8 Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c084e354>] syscall_call+0x7/0xb Aug 11 06:38:12 localhost kernel: [ 2464.038052] [<c0840000>] ? timer_cpu_notify+0x1c5/0x201 Aug 11 06:38:13 localhost abrt-dump-oops: Reported 1 kernel oopses to Abrt Aug 11 06:38:13 localhost abrtd: Directory 'oops-2011-08-11-06:38:13-630-0' creation detected Aug 11 06:38:13 localhost abrtd: Can't open file '/var/spool/abrt/oops-2011-08-11-06:38:13-630-0/uid': No such file or directory Aug 11 06:38:13 localhost abrtd: New dump directory /var/spool/abrt/oops-2011-08-11-06:38:13-630-0, processing Version-Release number of selected component (if applicable): 3.0.1-3.fc16.i686.PAE btrfs-progs-0.19-13.fc15.i686 Steps to Reproduce: 1. did a fresh install of f16 alpha rc3 in a kvm, I specified to use one of two cpus. 2. file system is btrfs (if that matters) 3.