From: Nick Piggin <nickpiggin@yahoo.com.au>
To: linux-ia64@vger.kernel.org
Subject: Re: Fix ia64 bit ops: Full barriers for bit operations returning
Date: Tue, 04 Apr 2006 01:05:43 +0000 [thread overview]
Message-ID: <4431C667.7090301@yahoo.com.au> (raw)
In-Reply-To: <Pine.LNX.4.64.0604031129510.21064@schroedinger.engr.sgi.com>
Chen, Kenneth W wrote:
>Christoph Lameter wrote on Monday, April 03, 2006 11:33 AM
>
>>
>>Note that this only fixes up the bit operations if used together with the
>>earlier fix for the clear_bit barriers. We still need a fix for general
>>atomic operations.
>>
>>Signed-off-by: Christoph Lameter <clameter@sgi.com>
>>
>
>
>Looks good to me.
>Acked-by: Ken Chen <kenneth.w.chen@intel.com>
>
I don't think my concern about this approach was ever answered: an
acquire + release combination will always allow memory operations to
move past the atomic operation, won't it?
I would have thought you'd need release + acquire.
--
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next prev parent reply other threads:[~2006-04-04 1:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-03 18:32 Fix ia64 bit ops: Full barriers for bit operations returning a value Christoph Lameter
2006-04-03 23:11 ` Chen, Kenneth W
2006-04-04 1:05 ` Nick Piggin [this message]
2006-04-04 2:11 ` Fix ia64 bit ops: Full barriers for bit operations returning a Christoph Lameter
2006-04-04 13:30 ` Fix ia64 bit ops: Full barriers for bit operations returning a value Chen, Kenneth W
2006-04-04 14:40 ` Fix ia64 bit ops: Full barriers for bit operations returning a Christoph Lameter
2006-04-04 16:48 ` Fix ia64 bit ops: Full barriers for bit operations returning Zoltan Menyhart
2006-04-05 15:30 ` Zoltan Menyhart
2006-04-05 16:17 ` Fix ia64 bit ops: Full barriers for bit operations returning a Christoph Lameter
2006-04-05 16:44 ` Fix ia64 bit ops: Full barriers for bit operations returning Zoltan Menyhart
2006-04-05 17:31 ` Fix ia64 bit ops: Full barriers for bit operations returning a Christoph Lameter
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