From: paulmck@linux.vnet.ibm.com (Paul E. McKenney)
Subject: [ltt-dev] lock-free data structures (was Re: [PATCH 12/12] centralize definition of BITS_PER_LONG)
Date: Fri, 19 Feb 2010 16:44:27 -0800 [thread overview]
Message-ID: <20100220004427.GJ6778@linux.vnet.ibm.com> (raw)
In-Reply-To: <4B7F2885.50505@redhat.com>
On Sat, Feb 20, 2010 at 01:10:45AM +0100, Paolo Bonzini wrote:
> On 02/20/2010 12:51 AM, Paul E. McKenney wrote:
>> Doesn't the use of RCU prevent the ABA scenario, and doesn't that make
>> DCAS unnecessary?
>
> Yeah, looks like it's so! So by wrapping enqueue/dequeue with RCU you
> could strip the generation counts (giving the algorithm that is usually
> taught for garbage-collected environments only)... nice, I guess DCAS is
> not so much needed in the context of liburcu.
>
> I'll try to write an example.
I look forward to seeing it!
Thanx, Paul
next prev parent reply other threads:[~2010-02-20 0:44 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-15 19:04 [ltt-dev] [PATCH 00/12] provide default definition of uatomic builtins Paolo Bonzini
2010-02-15 19:04 ` [ltt-dev] [PATCH 01/12] use kernel style makefile output Paolo Bonzini
2010-02-15 19:04 ` [ltt-dev] [PATCH 02/12] use autoconf symbolic linking Paolo Bonzini
2010-02-15 19:04 ` [ltt-dev] [PATCH 03/12] add urcu/arch_defaults.h Paolo Bonzini
2010-02-18 2:57 ` Mathieu Desnoyers
2010-02-15 19:04 ` [ltt-dev] [PATCH 04/12] define sync_core for x86 PIC Paolo Bonzini
2010-02-15 19:04 ` [ltt-dev] [PATCH 05/12] remove compat_uatomic_cmpxchg #define from non-x86 Paolo Bonzini
2010-02-15 19:04 ` [ltt-dev] [PATCH 06/12] add uatomic_defaults.h, use it for default definitions Paolo Bonzini
2010-02-18 3:10 ` Mathieu Desnoyers
2010-02-15 19:04 ` [ltt-dev] [PATCH 07/12] use uatomic_defaults.h for common fallback implementations Paolo Bonzini
2010-02-15 19:04 ` [ltt-dev] [PATCH 08/12] move whether atomic byte/short exists to uatomic_arch_*.h Paolo Bonzini
2010-02-18 3:12 ` Mathieu Desnoyers
2010-02-15 19:04 ` [ltt-dev] [PATCH 09/12] add Alpha support Paolo Bonzini
2010-02-18 3:21 ` Mathieu Desnoyers
2010-02-15 19:04 ` [ltt-dev] [PATCH 10/12] support compiling on unknown architectures Paolo Bonzini
2010-02-18 3:22 ` Mathieu Desnoyers
2010-02-15 19:04 ` [ltt-dev] [PATCH 11/12] avoid multiple evaluation of STORE_SHARED argument Paolo Bonzini
2010-02-18 3:28 ` Mathieu Desnoyers
2010-02-18 8:45 ` Paolo Bonzini
2010-02-15 19:04 ` [ltt-dev] [PATCH 12/12] centralize definition of BITS_PER_LONG Paolo Bonzini
2010-02-18 3:25 ` Mathieu Desnoyers
2010-02-18 8:45 ` Paolo Bonzini
2010-02-18 13:46 ` Mathieu Desnoyers
2010-02-18 15:27 ` Paolo Bonzini
2010-02-18 16:09 ` Mathieu Desnoyers
2010-02-19 19:25 ` [ltt-dev] lock-free data structures (was Re: [PATCH 12/12] centralize definition of BITS_PER_LONG) Paolo Bonzini
2010-02-19 23:51 ` Paul E. McKenney
2010-02-20 0:10 ` Paolo Bonzini
2010-02-20 0:44 ` Paul E. McKenney [this message]
2010-02-15 19:04 ` [ltt-dev] [PATCH 13/12] test uatomic_defaults.h Paolo Bonzini
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