From: Thomas Gleixner <tglx@linutronix.de>
To: karim@opersys.com
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.11-rc1-mm1
Date: Sat, 15 Jan 2005 10:57:12 +0100 [thread overview]
Message-ID: <1105783032.13265.207.camel@tglx.tec.linutronix.de> (raw)
In-Reply-To: <41E86E6F.6090004@opersys.com>
Hi Karim,
On Fri, 2005-01-14 at 20:14 -0500, Karim Yaghmour wrote:
> Gee Thomas, I guess you really want to take this one until the last
> man is standing. Feel free to use the ad-hominem tone if it suits
> you. Don't hold it against me though if I don't bite :)
No personal offence was intended.
> Thomas Gleixner wrote:
> > It's not only me, who needs constant time. Everybody interested in
> > tracing will need that. In my opinion its a principle of tracing.
>
> relayfs is a generalized buffering mechanism. Tracing is one application
> it serves. Check out the web site: "high-speed data-relay filesystem."
> Fancy name huh ...
I do not doubt that.
But hardwiring an instrumentation framework on it is also hardwiring
implicit restrictions on the usability of the instrumentation for
certain purposes.
> > The "lockless" mechanism is _FAKE_ as I already pointed out. It replaces
> > locks by do { } while loops. So what ?
>
> Well for one thing, a portion of code running in user-context won't
> disable interrupts while it's attempting to get buffer space, and
> therefore won't impact on interrupt delivery.
The do {} while loops are in the fast ltt_log_event path
> Clearly you haven't read the implementation and/or aren't familiar with
> its use. Usually, what you want to do is open(), mmap(), write(), there
> is no "conversion" to a file. The filesystem abstraction is just a
> namespace holder for us.
I have read it and tried it. I don't see a point why I can't map a
ringbuffer into user space.
I'm not beating on the ringbuffer, but I'm using it as an example. :)
> That's not the point. You're bending backwards as far as you can reach
> trying to raise as much mud as you can, but when pressed for actual
> constructive input you hide behind a strawman argument. If you don't
> have anything to say, then stop whining.
I gave constructive criticism along with points, where I just point on
the restrictions and weakness of the implementation.
tglx
next prev parent reply other threads:[~2005-01-15 9:57 UTC|newest]
Thread overview: 142+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-14 8:23 2.6.11-rc1-mm1 Andrew Morton
2005-01-14 8:47 ` 2.6.11-rc1-mm1 Andi Kleen
2005-01-14 9:27 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-14 10:27 ` 2.6.11-rc1-mm1 Nikita Danilov
2005-01-14 10:38 ` 2.6.11-rc1-mm1 Andi Kleen
2005-01-14 11:06 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-14 15:31 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-14 21:11 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-14 22:58 ` 2.6.11-rc1-mm1 Tim Bird
2005-01-15 0:20 ` 2.6.11-rc1-mm1 Andi Kleen
2005-01-15 4:25 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-15 1:06 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-15 4:18 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-16 2:38 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-16 6:00 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-16 16:52 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-16 21:18 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-17 1:37 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-17 2:24 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-17 12:20 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-17 20:32 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-17 22:31 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-17 22:42 ` 2.6.11-rc1-mm1 Robert Wisniewski
2005-01-17 23:26 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-17 23:41 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-18 0:02 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-18 3:05 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-17 13:54 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-17 21:27 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-17 23:57 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-18 4:03 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-18 4:30 ` 2.6.11-rc1-mm1 Aaron Cohen
2005-01-18 4:46 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-18 8:07 ` 2.6.11-rc1-mm1 Tom Zanussi
2005-01-18 16:40 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-18 19:37 ` 2.6.11-rc1-mm1 Tom Zanussi
2005-01-18 15:31 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-21 6:26 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-21 22:23 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-23 7:43 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-23 7:52 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-23 8:28 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-24 0:38 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-25 9:12 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-18 1:13 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-18 2:52 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-17 17:02 ` 2.6.11-rc1-mm1 Tom Zanussi
2005-01-16 19:05 ` 2.6.11-rc1-mm1 Tom Zanussi
2005-01-19 11:14 ` 2.6.11-rc1-mm1 Christoph Hellwig
2005-01-19 16:53 ` 2.6.11-rc1-mm1 Tom Zanussi
2005-01-16 16:14 ` 2.6.11-rc1-mm1 Christoph Hellwig
2005-01-16 19:47 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-16 20:30 ` 2.6.11-rc1-mm1 Tom Zanussi
2005-01-19 11:11 ` 2.6.11-rc1-mm1 Christoph Hellwig
2005-01-14 15:24 ` 2.6.11-rc1-mm1 Roman Zippel
2005-01-18 11:19 ` 2.6.11-rc1-mm1 Masami Hiramatsu
2005-01-18 11:46 ` 2.6.11-rc1-mm1 Andi Kleen
2005-01-18 14:52 ` [Lkst-develop] 2.6.11-rc1-mm1 Masami Hiramatsu
2005-01-14 12:36 ` 2.6.11-rc1-mm1 Miklos Szeredi
2005-01-14 13:04 ` 2.6.11-rc1-mm1 Kasper Sandberg
2005-01-14 18:35 ` 2.6.11-rc1-mm1 Andrew Morton
2005-01-14 19:08 ` 2.6.11-rc1-mm1 Rogério Brito
2005-01-14 19:41 ` 2.6.11-rc1-mm1 Peter Buckingham
2005-01-17 17:04 ` 2.6.11-rc1-mm1 Matthias Urlichs
2005-01-14 19:02 ` 2.6.11-rc1-mm1 Bill Davidsen
2005-01-14 15:07 ` 2.6.11-rc1-mm1 Barry K. Nathan
2005-01-14 16:56 ` 2.6.11-rc1-mm1 Dave Jones
2005-01-14 17:55 ` 2.6.11-rc1-mm1 Barry K. Nathan
2005-01-19 23:06 ` 2.6.11-rc1-mm1 Marcos D. Marado Torres
2005-01-19 23:54 ` 2.6.11-rc1-mm1 Barry K. Nathan
2005-01-14 15:35 ` 2.6.11-rc1-mm1 Zwane Mwaikambo
2005-01-14 22:03 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-14 17:35 ` [patch] 2.6.11-rc1-mm1: ip_tables.c: ipt_find_target must be EXPORT_SYMBOL'ed Adrian Bunk
2005-01-14 17:43 ` Patrick McHardy
2005-01-14 22:41 ` 2.6.11-rc1-mm1 Tim Bird
2005-01-14 22:46 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-14 23:22 ` 2.6.11-rc1-mm1 Tim Bird
2005-01-15 0:24 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-15 1:27 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-16 16:18 ` 2.6.11-rc1-mm1 Christoph Hellwig
2005-01-15 13:08 ` [RFC] Instrumentation (was Re: 2.6.11-rc1-mm1) Thomas Gleixner
2005-01-16 2:09 ` Karim Yaghmour
2005-01-16 3:11 ` Roman Zippel
2005-01-16 4:23 ` Karim Yaghmour
2005-01-16 23:43 ` Thomas Gleixner
2005-01-17 1:54 ` Karim Yaghmour
2005-01-17 10:26 ` Thomas Gleixner
2005-01-17 20:34 ` Karim Yaghmour
2005-01-17 22:18 ` Thomas Gleixner
2005-01-17 23:57 ` Karim Yaghmour
2005-01-18 8:46 ` Thomas Gleixner
2005-01-18 16:31 ` Karim Yaghmour
2005-01-19 7:13 ` Werner Almesberger
2005-01-19 17:38 ` Karim Yaghmour
2005-01-14 22:48 ` 2.6.11-rc1-mm1 Andre Eisenbach
2005-01-15 8:42 ` 2.6.11-rc1-mm1 Miklos Szeredi
2005-01-15 8:45 ` 2.6.11-rc1-mm1 Miklos Szeredi
[not found] ` <1105740276.8604.83.camel@tglx.tec.linutronix.de>
2005-01-14 23:09 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-15 0:01 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-15 0:26 ` 2.6.11-rc1-mm1 Andrew Morton
2005-01-15 1:00 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-15 1:25 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-15 10:20 ` 2.6.11-rc1-mm1 Thomas Gleixner
2005-01-16 4:13 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-16 15:19 ` 2.6.11-rc1-mm1 Robert Wisniewski
2005-01-15 1:14 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-15 9:57 ` Thomas Gleixner [this message]
2005-01-16 16:21 ` 2.6.11-rc1-mm1 Christoph Hellwig
2005-01-16 19:49 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-16 20:11 ` 2.6.11-rc1-mm1 Robert Wisniewski
2005-01-16 20:32 ` 2.6.11-rc1-mm1 Andrew Morton
2005-01-16 21:06 ` 2.6.11-rc1-mm1 Robert Wisniewski
2005-01-16 21:40 ` 2.6.11-rc1-mm1 Arjan van de Ven
2005-01-17 15:48 ` 2.6.11-rc1-mm1 Robert Wisniewski
2005-01-17 16:13 ` 2.6.11-rc1-mm1 Christoph Hellwig
2005-01-17 21:38 ` 2.6.11-rc1-mm1 Karim Yaghmour
2005-01-16 20:39 ` 2.6.11-rc1-mm1 Christoph Hellwig
2005-01-16 21:14 ` 2.6.11-rc1-mm1 Robert Wisniewski
2005-01-15 2:58 ` 2.6.11-rc1-mm1 William Lee Irwin III
2005-01-17 22:19 ` 2.6.11-rc1-mm1 William Lee Irwin III
2005-01-16 0:59 ` 2.6.11-rc1-mm1 Joseph Fannin
2005-01-16 19:09 ` 2.6.11-rc1-mm1 Daniel Drake
2005-01-16 19:20 ` 2.6.11-rc1-mm1 William Lee Irwin III
2005-01-16 21:09 ` 2.6.11-rc1-mm1 Daniel Drake
2005-01-17 23:31 ` 2.6.11-rc1-mm1 J.A. Magallon
2005-01-18 2:35 ` 2.6.11-rc1-mm1 Daniel Drake
2005-01-18 2:54 ` [PATCH] Wait and retry mounting root device (revised) Daniel Drake
2005-01-18 0:34 ` Al Viro
2005-01-18 0:02 ` Randy.Dunlap
2005-01-18 8:05 ` Andries Brouwer
2005-01-18 8:28 ` Helge Hafting
2005-01-18 8:49 ` Andrew Morton
2005-01-18 13:20 ` Helge Hafting
2005-01-20 20:55 ` [PATCH] Configurable delay before mounting root device Daniel Drake
2005-01-20 20:24 ` Andrew Morton
2005-01-21 18:15 ` Daniel Drake
2005-01-20 22:49 ` William Park
2005-01-18 1:03 ` [PATCH] Wait and retry mounting root device (revised) William Park
2005-01-19 0:43 ` Werner Almesberger
2005-01-18 8:02 ` Andries Brouwer
2005-01-19 20:11 ` Frank van Maarseveen
2005-01-17 6:49 2.6.11-rc1-mm1 Prasanna S Panchamukhi
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