linux-kernel - autofs4 hang in 2.6.37-rc1

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Date:	Sun, 14 Nov 2010 14:55:07 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Ian Kent <raven@...maw.net>, autofs@...ux.kernel.org
CC:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: autofs4 hang in 2.6.37-rc1

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.

-- 
error compiling committee.c: too many arguments to function

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