From: Victor Yodaiken <yodaiken@fsmlabs.com>
To: BALBIR SINGH <balbir.singh@wipro.com>
Cc: Linus Torvalds <torvalds@transmeta.com>, linux-kernel@vger.kernel.org
Subject: Re: [Lse-tech] Re: RFC: patch to allow lock-free traversal of lists with insertion
Date: Wed, 10 Oct 2001 09:23:00 -0600 [thread overview]
Message-ID: <20011010092300.A8389@hq2> (raw)
In-Reply-To: <3BC3E424.1070901@wipro.com>
On Wed, Oct 10, 2001 at 11:31:08AM +0530, BALBIR SINGH wrote:
> Linus Torvalds wrote:
> >I can't think of many lists like that. The PCI lists certainly are both
> >add/remove: cardbus bridges and hotplug-PCI means that they are not just
> >purely "enumerate at bootup".
> >
>
> I agree, I just thought of one case quickly. Assume that somebody did a cat /proc/pci.
> Meanwhile somebody is adding a new pci device (hotplug PCI) simultaneously (which is very rare).
> I would not care if the new device showed up in the output of /proc/pci this time. It would
> definitely show up next time. Meanwhile locking the list (just in case it changes) is an
> overhead in the case above. I was referring to these cases in my earlier mail.
So you make the data structure and algorithms more complex and hard to maintain in
order to get an undetectable improvement in the speed of something that almost
never happens and and that is not even in the same neighborhood as being a
bottleneck?
next prev parent reply other threads:[~2001-10-10 15:28 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-09 15:45 RFC: patch to allow lock-free traversal of lists with insertion Paul McKenney
2001-10-09 17:00 ` Richard Henderson
2001-10-10 3:33 ` Paul Mackerras
2001-10-10 17:02 ` Richard Henderson
2001-10-10 2:05 ` [Lse-tech] " Andrea Arcangeli
2001-10-10 5:05 ` Linus Torvalds
2001-10-10 5:17 ` BALBIR SINGH
2001-10-10 5:29 ` Davide Libenzi
2001-10-10 5:46 ` Linus Torvalds
2001-10-10 6:01 ` BALBIR SINGH
2001-10-10 15:23 ` Victor Yodaiken [this message]
2001-10-10 7:14 ` kdb requires kallsyms Kirill Ratkin
2001-10-10 7:38 ` BALBIR SINGH
2001-10-10 6:16 ` [Lse-tech] Re: RFC: patch to allow lock-free traversal of lists with insertion Paul Mackerras
2001-10-10 6:30 ` Linus Torvalds
2001-10-10 7:36 ` Paul Mackerras
2001-10-10 15:54 ` Victor Yodaiken
2001-10-10 21:56 ` Keith Owens
2001-10-10 22:24 ` Victor Yodaiken
2001-10-10 23:46 ` David S. Miller
2001-10-11 0:24 ` Davide Libenzi
2001-10-10 11:54 ` Keith Owens
2001-10-10 13:42 ` AIC7XXX war
2001-10-10 21:40 ` AIC7XXX Luigi Genoni
2001-10-10 13:24 ` [Lse-tech] Re: RFC: patch to allow lock-free traversal of lists with insertion Ivan Kokshaysky
2001-10-10 13:41 ` Andrea Arcangeli
-- strict thread matches above, loose matches on Subject: below --
2001-10-10 4:43 Paul McKenney
2001-10-10 6:54 Dipankar Sarma
2001-10-10 7:06 Dipankar Sarma
2001-10-10 7:21 ` BALBIR SINGH
2001-10-10 9:06 ` Dipankar Sarma
2001-10-10 7:58 Dipankar Sarma
[not found] <20011010182730.0077454b.rusty@rustcorp.com.au>
2001-10-10 9:36 ` Linus Torvalds
2001-10-11 6:50 ` Rusty Russell
2001-10-10 10:06 Dipankar Sarma
2001-10-10 10:18 ` Linus Torvalds
2001-10-10 11:43 ` Dipankar Sarma
2001-10-12 3:27 ` Rusty Russell
2001-10-12 16:56 ` Linus Torvalds
2001-10-12 18:53 ` Dipankar Sarma
2001-10-13 7:25 ` Rusty Russell
2001-10-10 15:24 Paul McKenney
2001-10-10 16:58 ` Andrea Arcangeli
2001-10-10 17:25 ` Linus Torvalds
2001-10-12 5:06 ` Rusty Russell
2001-10-12 16:28 ` Linus Torvalds
2001-10-12 19:50 ` Al Dunsmuir
2001-10-13 1:07 ` Paul Mackerras
2001-10-13 1:54 ` Davide Libenzi
2001-10-13 2:04 ` Linus Torvalds
2001-10-13 2:31 ` Davide Libenzi
2001-10-13 2:46 ` Davide Libenzi
2001-10-13 3:30 ` Linus Torvalds
2001-10-13 2:49 ` Paul Mackerras
2001-10-13 2:00 ` Linus Torvalds
2001-10-13 7:38 ` Rusty Russell
2001-10-10 16:00 Paul McKenney
2001-10-10 21:44 Paul McKenney
2001-10-11 10:34 Dipankar Sarma
2001-10-13 14:42 Paul McKenney
2001-10-13 17:23 ` Linus Torvalds
2001-10-13 17:28 ` Linus Torvalds
2001-10-14 7:25 ` Dipankar Sarma
2001-10-13 18:42 ` Andi Kleen
2001-10-13 19:15 ` Alexander Viro
2001-10-13 20:44 ` Rusty Russell
2001-10-13 21:19 ` Rusty Russell
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