From: "H. Peter Anvin" <hpa@zytor.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
Frederic Weisbecker <fweisbec@gmail.com>,
Hendrik Brueckner <brueckner@linux.vnet.ibm.com>,
Jason Baron <jbaron@redhat.com>,
linux-kernel@vger.kernel.org, mingo@elte.hu,
laijs@cn.fujitsu.com, rostedt@goodmis.org, jiayingz@google.com,
mbligh@google.com, lizf@cn.fujitsu.com,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 08/12] add trace events for each syscall entry/exit
Date: Wed, 26 Aug 2009 10:24:03 -0700 [thread overview]
Message-ID: <4A956FB3.5030400@zytor.com> (raw)
In-Reply-To: <1251270602.7538.1228.camel@twins>
On 08/26/2009 12:10 AM, Peter Zijlstra wrote:
> On Tue, 2009-08-25 at 14:31 -0400, Mathieu Desnoyers wrote:
>> For instance, some
>> proprietary Linux driver does very odd things with system calls within
>> kernel threads, like invoking them with int 0x80.
>
> So who is going to send the x86 patch to make int 0x80 from kernel space
> panic the machine? :-)
Panicing might be a pretty darn good idea, since $DEITY knows what state
your stacks are in at that point, and if it is about to overflow.
... besides all the other evilness that entails.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-08-26 17:29 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-10 20:52 [PATCH 00/12] add syscall tracepoints V3 Jason Baron
2009-08-10 20:52 ` [PATCH 01/12] map syscall name to number Jason Baron
2009-08-10 20:52 ` [PATCH 02/12] call arch_init_ftrace_syscalls at boot Jason Baron
2009-08-10 20:52 ` [PATCH 03/12] add DECLARE_TRACE_WITH_CALLBACK() macro Jason Baron
2009-08-10 20:52 ` [PATCH 04/12] add syscall tracepoints Jason Baron
2009-08-10 20:52 ` [PATCH 05/12] update FTRACE_SYSCALL_MAX Jason Baron
2009-08-11 11:00 ` Frederic Weisbecker
2009-08-11 19:39 ` Matt Fleming
2009-08-24 13:41 ` Paul Mundt
2009-08-24 14:06 ` Jason Baron
2009-08-24 14:15 ` Paul Mundt
2009-08-24 14:34 ` Frederic Weisbecker
2009-08-24 14:37 ` Paul Mundt
2009-08-24 14:42 ` Jason Baron
2009-08-24 14:50 ` Paul Mundt
2009-08-24 18:34 ` Ingo Molnar
2009-08-10 20:52 ` [PATCH 06/12] trace_event - raw_init bailout Jason Baron
2009-08-10 20:52 ` [PATCH 07/12] add ftrace_event_call void * 'data' field Jason Baron
2009-08-11 10:09 ` Frederic Weisbecker
2009-08-17 22:19 ` Steven Rostedt
2009-08-17 23:09 ` Frederic Weisbecker
2009-08-18 0:06 ` Steven Rostedt
2009-08-10 20:52 ` [PATCH 08/12] add trace events for each syscall entry/exit Jason Baron
2009-08-11 10:50 ` Frederic Weisbecker
2009-08-11 11:45 ` Ingo Molnar
2009-08-11 12:01 ` Frederic Weisbecker
2009-08-25 12:50 ` Hendrik Brueckner
2009-08-25 14:15 ` Frederic Weisbecker
2009-08-25 16:02 ` Hendrik Brueckner
2009-08-25 16:20 ` Mathieu Desnoyers
2009-08-25 16:59 ` Frederic Weisbecker
2009-08-25 17:31 ` Frederic Weisbecker
2009-08-25 18:31 ` Mathieu Desnoyers
2009-08-25 19:42 ` Frederic Weisbecker
2009-08-25 19:51 ` Mathieu Desnoyers
2009-08-26 0:19 ` Frederic Weisbecker
2009-08-26 0:42 ` Mathieu Desnoyers
2009-08-26 7:28 ` Ingo Molnar
2009-08-26 17:11 ` Mathieu Desnoyers
2009-08-26 6:48 ` Peter Zijlstra
2009-08-25 22:04 ` Martin Schwidefsky
2009-08-26 7:38 ` Heiko Carstens
2009-08-26 12:32 ` Frederic Weisbecker
2009-08-26 6:21 ` Peter Zijlstra
2009-08-26 17:08 ` Mathieu Desnoyers
2009-08-26 18:41 ` Christoph Hellwig
2009-08-26 18:42 ` Christoph Hellwig
2009-08-26 19:01 ` Mathieu Desnoyers
2009-08-26 7:10 ` Peter Zijlstra
2009-08-26 17:10 ` Mathieu Desnoyers
2009-08-26 17:24 ` H. Peter Anvin [this message]
2009-08-25 17:04 ` Jason Baron
2009-08-25 18:15 ` Mathieu Desnoyers
2009-08-26 12:35 ` Frederic Weisbecker
2009-08-26 12:59 ` Heiko Carstens
2009-08-26 13:30 ` Frederic Weisbecker
2009-08-26 13:48 ` Steven Rostedt
2009-08-26 13:53 ` Frederic Weisbecker
2009-08-26 14:44 ` Steven Rostedt
2009-08-26 13:56 ` Peter Zijlstra
2009-08-26 14:41 ` Steven Rostedt
2009-08-26 14:10 ` Heiko Carstens
2009-08-26 14:27 ` Frederic Weisbecker
2009-08-26 14:43 ` Steven Rostedt
2009-08-26 16:14 ` Frederic Weisbecker
2009-08-26 14:43 ` Steven Rostedt
2009-08-26 14:41 ` Hendrik Brueckner
2009-08-28 12:28 ` [tip:tracing/core] tracing: Don't trace kernel thread syscalls tip-bot for Hendrik Brueckner
2009-08-25 21:40 ` [PATCH 08/12] add trace events for each syscall entry/exit Frederic Weisbecker
2009-08-25 22:09 ` Frederic Weisbecker
2009-08-26 7:47 ` Heiko Carstens
2009-08-28 12:27 ` [tip:tracing/core] tracing: Check invalid syscall nr while tracing syscalls tip-bot for Hendrik Brueckner
2009-08-10 20:52 ` [PATCH 09/12] add support traceopint ids Jason Baron
2009-08-11 11:28 ` Frederic Weisbecker
2009-08-10 20:53 ` [PATCH 10/12] add perf counter support Jason Baron
2009-08-11 12:12 ` Frederic Weisbecker
2009-08-11 12:17 ` Ingo Molnar
2009-08-11 12:25 ` Frederic Weisbecker
2009-08-10 20:53 ` [PATCH 11/12] add more namespace area to 'perf list' output Jason Baron
2009-08-10 20:53 ` [PATCH 12/12] convert x86_64 mmap and uname to use DEFINE_SYSCALL Jason Baron
2009-08-25 12:31 ` [PATCH 00/12] add syscall tracepoints V3 - s390 arch update Hendrik Brueckner
2009-08-25 13:52 ` Frederic Weisbecker
2009-08-25 14:39 ` Heiko Carstens
2009-08-25 19:52 ` Frederic Weisbecker
2009-08-25 15:38 ` Hendrik Brueckner
2009-08-26 16:53 ` Frederic Weisbecker
2009-08-27 7:27 ` [PATCH]: tracing: s390 arch updates for tracing syscalls Hendrik Brueckner
2009-08-28 12:27 ` [tip:tracing/core] tracing: Add syscall tracepoints - s390 arch update tip-bot for Hendrik Brueckner
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