Messages in this thread | | | Date | Sun, 14 Nov 2010 15:51:04 +0200 | From | Avi Kivity <> | Subject | Re: autofs4 hang in 2.6.37-rc1 |
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On 11/14/2010 02:55 PM, Avi Kivity wrote: > A 2.6.37-rc1 (f6614b7bb405a) setup hangs in autofs4: > > INFO: task automount:10399 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > automount D 0000000000000000 0 10399 1 0x00000000 > ffff88012a059da8 0000000000000082 0000000000000000 0000000000000000 > ffff88012a058010 ffff88012a059fd8 0000000000011800 ffff8801290f2c40 > ffff8801290f2fb0 ffff8801290f2fa8 0000000000011800 0000000000011800 > Call Trace: > [<ffffffff813a3c3c>] __mutex_lock_common+0x126/0x18b > [<ffffffff813a3cb5>] __mutex_lock_slowpath+0x14/0x16 > [<ffffffff813a3dbc>] mutex_lock+0x31/0x4b > [<ffffffff811b17f7>] autofs4_root_ioctl+0x28/0x53 > [<ffffffff810f5e5c>] do_vfs_ioctl+0x557/0x5bb > [<ffffffff810eca65>] ? sys_newlstat+0x2d/0x38 > [<ffffffff810f5f02>] sys_ioctl+0x42/0x65 > [<ffffffff81002b42>] system_call_fastpath+0x16/0x1b > > This is a simple /home automount. More info on request. >
Likely culprit:
automount S ffff88012a28a680 0 399 1 0x00000000 ffff88012a07bd08 0000000000000082 0000000000000000 0000000000000000 ffff88012a07a010 ffff88012a07bfd8 0000000000011800 ffff88012693c260 ffff88012693c5d0 ffff88012693c5c8 0000000000011800 0000000000011800 Call Trace: [<ffffffff81056197>] ? prepare_to_wait+0x67/0x74 [<ffffffff811b23eb>] autofs4_wait+0x5a4/0x6d5 [<ffffffff81055f25>] ? autoremove_wake_function+0x0/0x34 [<ffffffff811b2ba5>] autofs4_do_expire_multi+0x5b/0xa3 [<ffffffff811b2c39>] autofs4_expire_multi+0x4c/0x54 [<ffffffff811b1750>] autofs4_root_ioctl_unlocked+0x23e/0x252 [<ffffffff811b1808>] autofs4_root_ioctl+0x39/0x53 [<ffffffff810f5e5c>] do_vfs_ioctl+0x557/0x5bb [<ffffffff810ca644>] ? remove_vma+0x6e/0x76 [<ffffffff810cb6a2>] ? do_munmap+0x31c/0x33e [<ffffffff810f5f02>] sys_ioctl+0x42/0x65 [<ffffffff81002b42>] system_call_fastpath+0x16/0x1b
Shouldn't we drop autofs4_ioctl_mutex while we wait?
-- error compiling committee.c: too many arguments to function
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