From: "H. Peter Anvin" <hpa@zytor.com>
To: paulmck@linux.vnet.ibm.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-kernel@vger.kernel.org
Subject: Re: sequence lock in Linux
Date: Fri, 11 Jun 2010 14:38:59 -0700 [thread overview]
Message-ID: <4C12ACF3.8000007@zytor.com> (raw)
In-Reply-To: <20100611213602.GI2394@linux.vnet.ibm.com>
On 06/11/2010 02:36 PM, Paul E. McKenney wrote:
> Memory barriers in the sequence-lock code prevent this, assuming, as
> you point out, that memory clobber works (but if it doesn't, it should
> be fixed):
The constness is my main concern. It's not clear to me that "memory" is
meant to imply that const memory areas without volatile can be clobbered.
-hpa
next prev parent reply other threads:[~2010-06-11 21:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-11 19:40 sequence lock in Linux Mathieu Desnoyers
2010-06-11 20:07 ` Paul E. McKenney
2010-06-11 20:46 ` Mathieu Desnoyers
2010-06-11 20:07 ` Linus Torvalds
2010-06-11 20:36 ` Paul E. McKenney
2010-06-11 21:06 ` H. Peter Anvin
2010-06-11 21:36 ` Paul E. McKenney
2010-06-11 21:38 ` H. Peter Anvin [this message]
2010-06-11 22:04 ` Paul E. McKenney
2010-06-11 22:41 ` H. Peter Anvin
2010-06-11 21:09 ` Mathieu Desnoyers
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