* [Bug runtime/13868] New: Use UTRACE_ATTACH_ATOMIC when calling utrace create under lock.
@ 2012-03-19 19:28 mjw at redhat dot com
2012-03-19 19:30 ` [Bug runtime/13868] " fche at redhat dot com
2012-03-19 19:44 ` fche at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: mjw at redhat dot com @ 2012-03-19 19:28 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13868
Bug #: 13868
Summary: Use UTRACE_ATTACH_ATOMIC when calling utrace create
under lock.
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: runtime
AssignedTo: systemtap@sourceware.org
ReportedBy: mjw@redhat.com
Classification: Unclassified
commit e46635d5571a655868c2fd57e186fb6edbe77d78
Author: Mark Wielaard <mjw@redhat.com>
Date: Tue Jan 31 23:06:30 2012 +0100
Use UTRACE_ATTACH_ATOMIC when calling utrace create under lock.
UTRACE_ATTACH_ATOMIC is very new, but we need it when calling
utrace create while holding a lock or in interrupt context.
If it doesn't exist we do as before (define it as zero).
See http://sourceware.org/ml/systemtap/2011-q4/msg00340.html
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* [Bug runtime/13868] Use UTRACE_ATTACH_ATOMIC when calling utrace create under lock.
2012-03-19 19:28 [Bug runtime/13868] New: Use UTRACE_ATTACH_ATOMIC when calling utrace create under lock mjw at redhat dot com
@ 2012-03-19 19:30 ` fche at redhat dot com
2012-03-19 19:44 ` fche at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fche at redhat dot com @ 2012-03-19 19:30 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13868
Frank Ch. Eigler <fche at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fche at redhat dot com
--- Comment #1 from Frank Ch. Eigler <fche at redhat dot com> 2012-03-19 19:29:21 UTC ---
See required utrace patch at
https://www.redhat.com/archives/utrace-devel/2012-January/msg00001.html
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* [Bug runtime/13868] Use UTRACE_ATTACH_ATOMIC when calling utrace create under lock.
2012-03-19 19:28 [Bug runtime/13868] New: Use UTRACE_ATTACH_ATOMIC when calling utrace create under lock mjw at redhat dot com
2012-03-19 19:30 ` [Bug runtime/13868] " fche at redhat dot com
@ 2012-03-19 19:44 ` fche at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fche at redhat dot com @ 2012-03-19 19:44 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13868
Frank Ch. Eigler <fche at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #2 from Frank Ch. Eigler <fche at redhat dot com> 2012-03-19 19:41:48 UTC ---
Sample kernel BUG backtrace that is fixed by this work:
<3>[ 5423.930203] BUG: sleeping function called from invalid context at
xxx/intel/linux/mm/slub.c:847
<3>[ 5423.948137] in_atomic(): 0, irqs_disabled(): 0, pid: 3196, name: stapio
<4>[ 5423.956007] 1 lock held by stapio/3196:
<4>[ 5423.959994] #0: (rcu_read_lock){.+.+.+}, at: [<f1600603>]
rcu_read_lock+0x0/0x26 [utracetestgdwv2]
<4>[ 5423.969609] Pid: 3196, comm: stapio Tainted: G WC 3.0.8-dirty #1
<4>[ 5423.976924] Call Trace:
<4>[ 5423.979413] [<c10795e2>] ? utrace_attach_task+0x140/0x369
<4>[ 5423.984939] [<c102aad7>] __might_sleep+0xee/0xf5
<4>[ 5423.989736] [<c10d17f6>] kmem_cache_alloc+0x37/0x132
<4>[ 5423.994824] [<c10795e2>] utrace_attach_task+0x140/0x369
<4>[ 5424.000240] [<f1600603>] ? next_thread+0x2b/0x2b [utracetestgdwv2]
<4>[ 5424.006553] [<f1603007>] T.1331+0x41/0x15b [utracetestgdwv2]
<4>[ 5424.012425] [<f1603b65>] _stp_ctl_write_cmd+0x56a/0xac4
[utracetestgdwv2]
<4>[ 5424.019349] [<c11f9f1a>] ? security_file_permission+0x22/0x26
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2012-03-19 19:28 [Bug runtime/13868] New: Use UTRACE_ATTACH_ATOMIC when calling utrace create under lock mjw at redhat dot com
2012-03-19 19:30 ` [Bug runtime/13868] " fche at redhat dot com
2012-03-19 19:44 ` fche at redhat dot com
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