From: "Stephen C. Tweedie" <sct@dcs.ed.ac.uk>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: "Stephen C. Tweedie" <sct@dcs.ed.ac.uk>,
linux-mm@kvack.org, linux-smp@vger.rutgers.edu
Subject: Re: Lazy page reclamation on SMP machines: memory barriers
Date: Tue, 24 Mar 1998 22:54:18 GMT [thread overview]
Message-ID: <199803242254.WAA03274@dax.dcs.ed.ac.uk> (raw)
In-Reply-To: <Pine.LNX.3.95.980323151332.431D-100000@penguin.transmeta.com>
Hi,
On Mon, 23 Mar 1998 15:20:11 -0800 (PST), Linus Torvalds
<torvalds@transmeta.com> said:
> Intel guarantees total ordering around any locked instruction, so the
> spinlocks themselves act as the barriers.
Fine. Can we assume that spinlocks and atomic set/clear_bit
instructions have the same semantics on other CPUs?
I'm in London until the weekend, but I hope to have the lazy page
stealing in a fit state to release shortly after getting back thanks to
this.
--Stephen
next prev parent reply other threads:[~1998-03-24 23:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-03-23 22:49 Stephen C. Tweedie
1998-03-23 23:20 ` Linus Torvalds
1998-03-24 22:54 ` Stephen C. Tweedie [this message]
1998-03-24 23:45 ` David S. Miller
1998-03-25 0:11 ` Linus Torvalds
1998-03-25 9:08 ` Rik van Riel
1998-03-23 23:37 ` Linus Torvalds
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