Messages in this thread | | | Date | Thu, 7 Apr 2011 15:44:03 -0400 | From | Nick Bowler <> | Subject | Lockdep splat in autofs with 2.6.39-rc2 |
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Just saw this on 2.6.39-rc2 after half a day or so of uptime. I've never seen it before today so it may be a regression from 2.6.38. Nothing seems have failed as a result. Please let me know if you need any more info.
============================================= [ INFO: possible recursive locking detected ] 2.6.39-rc2 #177 --------------------------------------------- automount/23324 is trying to acquire lock: (&(&dentry->d_lock)->rlock/1){+.+...}, at: [<ffffffffa034ea28>] autofs4_expire_indirect+0x307/0x484 [autofs4] but task is already holding lock: (&(&dentry->d_lock)->rlock/1){+.+...}, at: [<ffffffffa034ea28>] autofs4_expire_indirect+0x307/0x484 [autofs4] other info that might help us debug this: 2 locks held by automount/23324: #0: (&(&sbi->lookup_lock)->rlock){+.+...}, at: [<ffffffffa034e9aa>] autofs4_expire_indirect+0x289/0x484 [autofs4] #1: (&(&dentry->d_lock)->rlock/1){+.+...}, at: [<ffffffffa034ea28>] autofs4_expire_indirect+0x307/0x484 [autofs4] stack backtrace: Pid: 23324, comm: automount Not tainted 2.6.39-rc2 #177 Call Trace: [<ffffffff81061dc7>] __lock_acquire+0xc83/0xcfa [<ffffffff8105f200>] ? static_obj+0x3d/0x4d [<ffffffff81062073>] ? lock_release_non_nested+0x1c8/0x227 [<ffffffffa034ea28>] ? autofs4_expire_indirect+0x307/0x484 [autofs4] [<ffffffffa034ea28>] ? autofs4_expire_indirect+0x307/0x484 [autofs4] [<ffffffff81061e95>] lock_acquire+0x57/0x6d [<ffffffffa034ea28>] ? autofs4_expire_indirect+0x307/0x484 [autofs4] [<ffffffff8131f4e3>] _raw_spin_lock_nested+0x39/0x48 [<ffffffffa034ea28>] ? autofs4_expire_indirect+0x307/0x484 [autofs4] [<ffffffff8131fb10>] ? _raw_spin_unlock+0x3e/0x4b [<ffffffffa034ea28>] autofs4_expire_indirect+0x307/0x484 [autofs4] [<ffffffffa034f184>] ? autofs_dev_ioctl_askumount+0x2d/0x2d [autofs4] [<ffffffffa034edbd>] autofs4_do_expire_multi+0x30/0xe9 [autofs4] [<ffffffffa034f184>] ? autofs_dev_ioctl_askumount+0x2d/0x2d [autofs4] [<ffffffffa034f184>] ? autofs_dev_ioctl_askumount+0x2d/0x2d [autofs4] [<ffffffffa034f19e>] autofs_dev_ioctl_expire+0x1a/0x1c [autofs4] [<ffffffffa034f738>] _autofs_dev_ioctl+0x2a3/0x348 [autofs4] [<ffffffffa034f7eb>] autofs_dev_ioctl+0xe/0x12 [autofs4] [<ffffffff810c750d>] do_vfs_ioctl+0x45f/0x4ae [<ffffffff810bab4e>] ? rcu_read_unlock+0x21/0x23 [<ffffffff810c759e>] sys_ioctl+0x42/0x65 [<ffffffff8132463b>] system_call_fastpath+0x16/0x1b
-- Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
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