[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-594-g12aa5f9

[fche@sourceware.org]

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- Log -----------------------------------------------------------------
commit 12aa5f9c1d9ac3dc7003f9c0e0b8e34c23d67407
Author: Frank Ch. Eigler <fche@redhat.com>
Date:   Tue Dec 13 17:27:38 2011 -0500

    PR13489/PR11671: more lockdep antihistamines
    
    * runtime/task_finder_vma.c (__stp_tf_vma_new_entry): Use
      STP_ALLOC_FLAGS for new vma entry memory allocation needs.

commit b9527ce55abb46cb0b2cb778bec7c2bb53788f26
Author: Frank Ch. Eigler <fche@redhat.com>
Date:   Tue Dec 13 16:02:33 2011 -0500

    PR13386: move _stp_kill_time out of preemption-disabled interval at shutdown
    
    Without this change, it was possible to get this warning:
    
    [ 2083.250059] stap_76e60190a026972913d9501600bceb0a_767363: systemtap: 1.7/0.152, base: fffffff
    fa066f000, memory: 4269data/40text/62ctx/2058net/377alloc kb, probes: 5474
    [ 2085.743714] BUG: sleeping function called from invalid context at kernel/mutex.c:271
    [ 2085.747088] in_atomic(): 1, irqs_disabled(): 0, pid: 31536, name: stapio
    [ 2085.749797] no locks held by stapio/31536.
    [ 2085.751520] Pid: 31536, comm: stapio Tainted: G           O 3.2.0-rc5-next-20111213 #1
    [ 2085.754634] Call Trace:
    [ 2085.756109]  [<ffffffff81094f35>] __might_sleep+0x135/0x1f0
    [ 2085.758339]  [<ffffffff81670c5f>] mutex_lock_nested+0x2f/0x3a0
    [ 2085.760624]  [<ffffffff810c14ed>] ? trace_hardirqs_on+0xd/0x10
    [ 2085.763117]  [<ffffffff81072482>] ? try_to_del_timer_sync+0xb2/0x1a0
    [ 2085.765854]  [<ffffffff8108ff6f>] srcu_notifier_chain_unregister+0x2f/0xf0
    [ 2085.771204]  [<ffffffff81072570>] ? try_to_del_timer_sync+0x1a0/0x1a0
    [ 2085.774824]  [<ffffffff814f462c>] cpufreq_unregister_notifier+0x1c/0x40
    [ 2085.780119]  [<ffffffffa06717ce>] _stp_kill_time+0x9e/0xa0 [stap_76e60190a026972913d9501600bceb0a_767363]
    [ 2085.785254]  [<ffffffffa0677a15>] _stp_cleanup_and_exit+0x375/0x430 [stap_76e60190a026972913d9501600bceb0a_767363]
    [ 2085.790342]  [<ffffffffa0677d82>] _stp_ctl_write_cmd+0x272/0xbb5 [stap_76e60190a026972913d9501600bceb0a_767363]
    [ 2085.794189]  [<ffffffff811ac4a6>] vfs_write+0xb6/0x180
    [ 2085.796239]  [<ffffffff81677579>] kretprobe_trampoline_holder+0x9/0x9
    [ 2085.798521]  [<ffffffff81677579>] kretprobe_trampoline_holder+0x9/0x9
    
    * translate.cxx (c_unparser::emit_module_exit): Move _stp_kill_time up a wee.

-----------------------------------------------------------------------

Summary of changes:
 runtime/task_finder_vma.c |    4 +++-
 translate.cxx             |   10 +++++-----
 2 files changed, 8 insertions(+), 6 deletions(-)


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