From: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@intel.com>
To: "Roland McGrath" <roland@redhat.com>
Cc: "Mathieu Desnoyers" <compudj@krystal.dyndns.org>,
"Andi Kleen" <ak@suse.de>, "Karim Yaghmour" <karim@opersys.com>,
"Masami Hiramatsu" <masami.hiramatsu@gmail.com>,
"Masami Hiramatsu" <hiramatu@sdl.hitachi.co.jp>,
"Richard J Moore" <richardj_moore@uk.ibm.com>,
<systemtap@sources.redhat.com>, <sugita@sdl.hitachi.co.jp>,
"Satoshi Oshima" <soshima@redhat.com>,
<michel.dagenais@polymtl.ca>
Subject: RE: Hitachi djprobe mechanism
Date: Mon, 01 Aug 2005 22:41:00 -0000 [thread overview]
Message-ID: <44BDAFB888F59F408FAE3CC35AB4704101E98DEA@orsmsx409> (raw)
>It's OK for probe insertion to be slow.
Yes, slow is okay as long as you are *not* taking the full
system down during probe inserting/removal time. Halting full
system during probe insertion/removal might not be acceptable
at least on IA64.
>So why not use RCU to
>synchronize
>other processors?
The thing here is while we are trying to modify the section of code say
couple of instructions to accommodate 5 bytes(jmp inst), during this
period
we don't want any cpu to be in the middle of this area and to be
*really*
sure they(other CPU's) don't get half backed instruction, we must
place all of the other CPU's in a known location. So in this scenario,
I doubt how RCU synchronization can help.
If I am wrong please educate me.
Cheers,
-Anil
next reply other threads:[~2005-08-01 22:41 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-01 22:41 Keshavamurthy, Anil S [this message]
2005-08-02 3:21 ` Roland McGrath
2005-08-02 3:35 ` Karim Yaghmour
-- strict thread matches above, loose matches on Subject: below --
2005-08-01 22:49 Keshavamurthy, Anil S
2005-08-01 23:05 ` Karim Yaghmour
2005-08-01 23:18 ` Karim Yaghmour
2005-08-01 20:46 Keshavamurthy, Anil S
2005-08-01 21:08 ` Karim Yaghmour
2005-08-01 16:14 Keshavamurthy, Anil S
2005-08-01 20:31 ` Roland McGrath
2005-08-04 0:28 ` Mathieu Desnoyers
2005-08-04 10:01 ` Andi Kleen
2005-08-05 16:25 ` Mathieu Desnoyers
2005-08-05 16:39 ` Andi Kleen
2005-08-01 15:50 Keshavamurthy, Anil S
2005-08-01 16:03 ` Mathieu Desnoyers
2005-07-29 0:18 Keshavamurthy, Anil S
2005-07-29 1:48 ` Karim Yaghmour
2005-07-29 3:41 ` Mathieu Desnoyers
2005-07-29 3:47 ` Karim Yaghmour
2005-07-29 1:53 ` Frank Ch. Eigler
2005-08-01 9:02 ` Mathieu Lacage
2005-08-01 13:18 ` Mathieu Desnoyers
2005-08-02 7:07 ` Mathieu Lacage
2005-07-27 21:05 Keshavamurthy, Anil S
2005-07-28 1:51 ` Karim Yaghmour
2005-07-28 2:10 ` Karim Yaghmour
2005-07-28 16:23 ` Masami Hiramatsu
2005-07-28 16:28 ` Karim Yaghmour
2005-07-28 17:36 ` Mathieu Desnoyers
[not found] ` <20050728110717.A30199@unix-os.sc.intel.com>
2005-07-28 18:33 ` Mathieu Desnoyers
[not found] ` <20050728133456.A32210@unix-os.sc.intel.com>
2005-07-28 23:53 ` Richard J Moore
2005-07-29 5:59 ` Mathieu Desnoyers
2005-07-29 7:55 ` Andi Kleen
2005-07-29 8:44 ` Richard J Moore
2005-07-29 8:46 ` Andi Kleen
2005-07-29 15:51 ` Mathieu Desnoyers
2005-07-30 15:55 ` Andi Kleen
2005-07-30 16:54 ` Mathieu Desnoyers
2005-07-31 22:03 ` Andi Kleen
2005-07-31 23:11 ` Mathieu Desnoyers
2005-08-01 15:37 ` Andi Kleen
2005-08-01 8:44 ` Richard J Moore
2005-08-01 13:21 ` Mathieu Desnoyers
2005-08-01 19:57 ` Satoshi Oshima
2005-08-01 20:21 ` Karim Yaghmour
2005-08-01 22:12 ` Satoshi Oshima
2005-08-01 22:54 ` Karim Yaghmour
2005-08-02 18:42 ` Satoshi Oshima
2005-08-03 14:50 ` Karim Yaghmour
2005-08-04 1:19 ` Mathieu Desnoyers
2005-08-04 3:31 ` Mathieu Desnoyers
2005-08-02 9:42 ` Mathieu Lacage
2005-08-02 15:09 ` Karim Yaghmour
2005-10-07 15:35 ` Richard J Moore
2005-10-08 18:33 ` mathieu lacage
2005-10-08 21:59 ` Richard J Moore
2005-10-08 23:24 ` Roland McGrath
2005-10-22 11:49 ` mathieu lacage
2005-10-22 22:09 ` Roland McGrath
2005-10-24 6:33 ` Mathieu Lacage
2005-10-24 19:48 ` Roland McGrath
[not found] ` <43621B0D.70204@sophia.inria.fr>
2005-11-07 10:04 ` mathieu lacage
2005-11-07 10:06 ` mathieu lacage
2005-11-08 9:49 ` Richard J Moore
2005-10-09 16:47 ` mathieu lacage
2005-08-02 15:33 ` Mathieu Lacage
2005-08-02 15:36 ` Mathieu Lacage
2005-08-02 16:12 ` Karim Yaghmour
2005-08-02 16:30 ` Mathieu Lacage
2005-08-02 16:46 ` Karim Yaghmour
2005-08-04 17:09 ` Mathieu Lacage
2005-08-03 14:46 ` Andi Kleen
2005-07-29 16:06 ` Frank Ch. Eigler
2005-07-29 18:24 ` sugita
2005-07-28 18:13 ` Richard J Moore
2005-07-22 18:09 Frank Ch. Eigler
2005-07-21 22:32 Richard J Moore
2005-07-21 22:52 ` Roland McGrath
2005-07-22 2:52 ` Richard J Moore
2005-07-26 7:14 ` Masami Hiramatsu
2005-07-26 7:53 ` Roland McGrath
2005-07-27 13:02 ` Masami Hiramatsu
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