linux-kernel - Re: [PATCH] tracer for sys_open()

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Message-ID: <c62985530901280558o7b7572efl8afeebb33b463e2b@mail.gmail.com>
Date:	Wed, 28 Jan 2009 14:58:28 +0100
From:	Frédéric Weisbecker <fweisbec@...il.com>
To:	"Frank Ch. Eigler" <fche@...hat.com>
Cc:	"Kok, Auke" <auke-jan.h.kok@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	powertop ml <power@...host.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>, srostedt@...hat.com,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Neil Horman <nhorman@...driver.com>, utrace-devel@...hat.com
Subject: Re: [PATCH] tracer for sys_open() - sreadahead

2009/1/28 Frank Ch. Eigler <fche@...hat.com>:
> Frederic Weisbecker <fweisbec@...il.com> writes:
>
>> [...]
>> Speaking about a global syscall tracer, I made a patch to trace only the syscalls
>> with the function-graph-tracer.
>> http://lkml.org/lkml/2008/12/30/267 This low-level part can easily
>> be used by all tracers that would like to inspect syscalls.
>> [...]
>> Just a change is needed: Steven requested that the part inside
>> syscall_trace_enter become a tracepoint, making it totally shareable
>> between tracers and easy to turn on and off.
>
> Alternately, you could just rely on utrace's hooks.  They were thought
> out more fully with respect to parameter access, manipulation, and
> programmatic control befitting even a debugger.
>
>
> - FChE
>

I don't know much it. But I will soon have some time to look at your
patch which uses ftrace from utrace.
Anyway, are there some plans about utrace to be merged? Unless I
couldn't be able to use
it...
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