From: Andi Kleen <ak@muc.de>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-kernel@vger.kernel.org, lse-tech@sourceforge.net,
Paul.McKenney@us.ibm.com, rusty@rustcorp.com.au
Subject: Re: [Lse-tech] Re: RFC: patch to allow lock-free traversal of lists with insertion
Date: 13 Oct 2001 20:42:34 +0200 [thread overview]
Message-ID: <k23d4njs9x.fsf@zero.aec.at> (raw)
In-Reply-To: <Pine.LNX.4.33.0110131015410.8707-100000@penguin.transmeta.com>
In-Reply-To: Linus Torvalds's message of "Sat, 13 Oct 2001 10:23:23 -0700 (PDT)"
In article <Pine.LNX.4.33.0110131015410.8707-100000@penguin.transmeta.com>,
Linus Torvalds <torvalds@transmeta.com> writes:
> - nobody has shown a case where existing normal locking ends up being
> really a huge problem, and where RCU clearly helps.
The poster child of such a case is module unloading. Keeping reference
counts for every even non sleeping use of a module is very painful.
The current "fix" -- putting module count increases in all possible module
callers to fix the unload races is slow and ugly and far too subtle to
get everything right. Waiting quiescent periods before unloading is a nice
alternative.
-Andi
next prev parent reply other threads:[~2001-10-13 18:42 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-13 14:42 [Lse-tech] Re: RFC: patch to allow lock-free traversal of lists with insertion Paul McKenney
2001-10-13 17:23 ` Linus Torvalds
2001-10-13 17:28 ` Linus Torvalds
2001-10-14 2:04 ` Re: RFC: patch to allow lock-free traversal of lists Paul E. McKenney
2001-10-14 7:25 ` [Lse-tech] Re: RFC: patch to allow lock-free traversal of lists with insertion Dipankar Sarma
2001-10-13 18:42 ` Andi Kleen [this message]
2001-10-13 19:15 ` Alexander Viro
2001-10-13 20:44 ` Rusty Russell
2001-10-13 21:19 ` Rusty Russell
2001-10-14 1:37 ` Paul E. McKenney
-- strict thread matches above, loose matches on Subject: below --
2001-10-11 10:34 [Lse-tech] " Dipankar Sarma
2001-10-10 21:44 Paul McKenney
2001-10-10 16:00 Paul McKenney
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 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
[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 7:58 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 6:54 Dipankar Sarma
2001-10-10 4:43 Paul McKenney
2001-10-09 15:45 Paul McKenney
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
2001-10-10 6:16 ` 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 13:24 ` Ivan Kokshaysky
2001-10-10 13:41 ` Andrea Arcangeli
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