linux-kernel - Re: Re: [PATCH] kprobe: initialize kprobe

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Message-ID: <515AD3CC.9040208@hitachi.com>
Date:	Tue, 02 Apr 2013 21:49:16 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	oskar.andero@...ymobile.com
Cc:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	"Collett, Toby" <Toby.Collett@...ymobile.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: Re: [PATCH] kprobe: initialize kprobe_blacklist when it is
 used firstly

(2013/04/02 21:16), oskar.andero@...ymobile.com wrote:
> On 12:49 Tue 02 Apr     , Masami Hiramatsu wrote:
>> Hi,
>>
>> (2013/04/01 15:55), Joonsoo Kim wrote:
>>> Currently, initializing kprobe_blacklist is done during boot process.
>>> It takes 230 ms on our android platform and this is significant amount
>>> for our use case. We can disable CONFIG_KPROBES for production kernel,
>>> but it is hassle. This kprobe functionality is not commonly used,
>>> so we don't need to pay this cost at all times. With this rationale,
>>> change code to initialize kprobe_blacklist when it is used firstly.
>>
>> I saw similar patch from Oskar and Toby, and I decided to wait
>> until his blacklist separating work. I'd like to ask Oskar
>> how the patch is going first.
>>
> 
> I am currently preparing a series of 4 patches including the move of
> blacklist initialization (same as Joonsoo's patch) and separation of
> architecture specific blackpoints.
> The patches are dependent, so I appreciate if you wait a bit.
> 
> You can expect the series at latest tomorrow.

Thanks! I'd like to see such general solution :)

Thank you,

-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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