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From: "Frank Ch. Eigler" <fche@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: ananth@in.ibm.com, Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
	Ingo Molnar <mingo@elte.hu>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Masami Hiramatsu <mhiramat@redhat.com>,
	Mel Gorman <mel@csn.ul.ie>,
	Jim Keniston <jkenisto@linux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	LKML <linux-kernel@vger.kernel.org>,
	Roland McGrath <roland@redhat.com>,
	Oleg Nesterov <oleg@redhat.com>,
	Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH v1 7/10] Uprobes Implementation
Date: Tue, 23 Mar 2010 11:26:08 -0400	[thread overview]
Message-ID: <20100323152608.GC2975@redhat.com> (raw)
In-Reply-To: <1269357354.5109.83.camel@twins>

Hi -

> > Now the question is, where the complexity needs to be.
> 
> Both in-tree consumers of uprobes (ftrace and perf) are capable of task
> filters. [...]

If you wish this new uprobes to be useful to tools such as gdb,
remember the value of preserving the property that processes not being
debugged are not to be interfered with.  You don't want a DoS due to
some guy setting ten thousand breakpoints on glibc.  Such
considerations should overrule perf/ftrace's simplifying assumptions
that after-the-fact event filtering is surely always sufficient.

- FChE

  reply	other threads:[~2010-03-23 15:27 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-20 14:24 [PATCH v1 0/10] Uprobes patches Srikar Dronamraju
2010-03-20 14:25 ` [PATCH v1 1/10] Move Macro W to insn.h Srikar Dronamraju
2010-03-20 15:50   ` Masami Hiramatsu
2010-03-22  6:24     ` Srikar Dronamraju
2010-03-22 14:11       ` Masami Hiramatsu
2010-03-20 14:25 ` [PATCH v1 2/10] Move replace_page() to mm/memory.c Srikar Dronamraju
2010-03-20 14:25 ` [PATCH v1 3/10] Enhance replace_page() to support pagecache Srikar Dronamraju
2010-03-20 14:25 ` [PATCH v1 4/10] User Space Breakpoint Assistance Layer Srikar Dronamraju
2010-03-23  1:40   ` Andrew Morton
2010-03-23  4:48     ` Randy Dunlap
2010-03-23 11:26     ` Srikar Dronamraju
2010-03-20 14:25 ` [PATCH v1 5/10] X86 details for user space breakpoint assistance Srikar Dronamraju
2010-03-20 14:26 ` [PATCH v1 6/10] Slot allocation for Execution out of line Srikar Dronamraju
2010-03-20 14:26 ` [PATCH v1 7/10] Uprobes Implementation Srikar Dronamraju
2010-03-23 11:01   ` Peter Zijlstra
2010-03-23 11:04     ` Peter Zijlstra
2010-03-23 12:23     ` Srikar Dronamraju
2010-03-23 13:46       ` Peter Zijlstra
2010-03-23 14:20         ` Masami Hiramatsu
2010-03-23 15:15           ` Peter Zijlstra
2010-03-23 17:36             ` Masami Hiramatsu
2010-03-24 10:22           ` Srikar Dronamraju
2010-03-23 15:05         ` Ananth N Mavinakayanahalli
2010-03-23 15:15           ` Peter Zijlstra
2010-03-23 15:26             ` Frank Ch. Eigler [this message]
2010-03-24  5:59             ` Ananth N Mavinakayanahalli
2010-03-24  7:58         ` Srikar Dronamraju
2010-03-24 13:00           ` Peter Zijlstra
2010-03-25  7:56             ` Srikar Dronamraju
2010-03-25  8:41             ` Srikar Dronamraju
2010-03-20 14:26 ` [PATCH v1 8/10] X86 details for uprobes Srikar Dronamraju
2010-03-20 14:26 ` [PATCH v1 9/10] Uprobes Documentation patch Srikar Dronamraju
2010-03-22  3:00   ` Randy Dunlap
2010-03-22  5:34     ` Srikar Dronamraju
2010-03-22 14:51       ` Randy Dunlap
2010-03-20 14:26 ` [PATCH v1 10/10] Uprobes samples Srikar Dronamraju
2010-03-23  1:38 ` [PATCH v1 0/10] Uprobes patches Andrew Morton
2010-03-23 10:55   ` Srikar Dronamraju

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