From: "David S. Miller" <davem@davemloft.net>
To: nickpiggin@yahoo.com.au
Cc: linux-arch@vger.kernel.org
Subject: Re: [Fwd: [PATCH 2.6.13] lockless pagecache 2/7]
Date: Fri, 02 Sep 2005 00:39:40 -0700 (PDT) [thread overview]
Message-ID: <20050902.003940.68050984.davem@davemloft.net> (raw)
In-Reply-To: <4317F2FE.8030109@yahoo.com.au>
Sparc32 lacks compare and exchange. I think PARISC lacks it
as well.
For these older SMP systems, at best you can assume there
is some kind of spinlock and perhaps a straight atomic
exchange instruction. You really can't assume the existance
of compare-and-swap.
next prev parent reply other threads:[~2005-09-02 7:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-02 6:36 [Fwd: [PATCH 2.6.13] lockless pagecache 2/7] Nick Piggin
2005-09-02 7:39 ` David S. Miller [this message]
2005-09-02 8:05 ` Nick Piggin
2005-09-04 13:28 ` Matthew Wilcox
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