From: Richard Henderson <rth@twiddle.net>
To: "Paul E. McKenney" <pmckenne@us.ibm.com>
Cc: lse-tech@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: RFC: patch to allow lock-free traversal of lists with insertion
Date: Mon, 8 Oct 2001 23:52:08 -0700 [thread overview]
Message-ID: <20011008235208.A26109@twiddle.net> (raw)
In-Reply-To: <200110090155.f991tPt22329@eng4.beaverton.ibm.com>
In-Reply-To: <200110090155.f991tPt22329@eng4.beaverton.ibm.com>; from pmckenne@us.ibm.com on Mon, Oct 08, 2001 at 06:55:24PM -0700
On Mon, Oct 08, 2001 at 06:55:24PM -0700, Paul E. McKenney wrote:
> This is a proposal to provide a wmb()-like primitive that enables
> lock-free traversal of lists while elements are concurrently being
> inserted into these lists.
I've discussed this with you before and you continue to have
completely missed the point.
Alpha requires that you issue read-after-read memory barriers on
the reader side if you require ordering between reads. That is
the extent of the weakness of the memory ordering.
Sparc64 is the same way.
This crap will never be applied. Your algorithms are simply broken
if you do not ensure proper read ordering via the rmb() macro.
r~
next prev parent reply other threads:[~2001-10-09 6:52 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-09 1:55 RFC: patch to allow lock-free traversal of lists with insertion Paul E. McKenney
2001-10-09 2:18 ` David S. Miller
2001-10-09 6:52 ` Richard Henderson [this message]
2001-10-09 9:03 ` Rusty Russell
2001-10-09 16:11 ` Richard Henderson
2001-10-10 1:39 ` Rusty Russell
2001-10-09 7:13 ` BALBIR SINGH
2001-10-09 7:46 ` Dipankar Sarma
2001-10-09 8:21 ` BALBIR SINGH
2001-10-09 8:48 ` Dipankar Sarma
-- strict thread matches above, loose matches on Subject: below --
2001-10-09 5:27 Paul McKenney
2001-10-09 5:56 ` David S. Miller
2001-10-09 6:43 ` Richard Henderson
2001-10-09 15:24 Paul McKenney
2001-10-09 15:28 Paul McKenney
2001-10-09 15:45 Paul McKenney
2001-10-09 17:00 ` Richard Henderson
2001-10-10 3:33 ` Paul Mackerras
2001-10-10 17:02 ` Richard Henderson
2001-10-09 16:51 Manfred Spraul
2001-10-09 17:46 Paul McKenney
2001-10-09 18:01 Paul McKenney
2001-10-10 1:19 Paul McKenney
2001-10-10 1:43 ` Andrea Arcangeli
2001-10-10 21:47 Paul McKenney
2001-10-10 22:22 ` Richard Henderson
2001-10-10 22:27 ` Richard Henderson
2001-10-11 1:56 Paul E. McKenney
2001-10-12 4:14 ` Rusty Russell
2001-10-13 14:48 ` Paul E. McKenney
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