From: Anton Blanchard <anton@samba.org>
To: Kanoj Sarcar <kanojsarcar@yahoo.com>
Cc: Andi Kleen <ak@suse.de>,
William Lee Irwin III <wli@holomorphy.com>,
linux-mm@kvack.org
Subject: Re: smp_rmb in mm/memory.c in 2.6.10
Date: Fri, 14 Jan 2005 08:59:55 +1100 [thread overview]
Message-ID: <20050113215955.GB6309@krispykreme.ozlabs.ibm.com> (raw)
In-Reply-To: <20050113212912.93033.qmail@web14308.mail.yahoo.com>
Hi Kanoj,
> Okay, I think I see what you and wli meant. But the assumption that
> spin_lock will order memory operations is still correct, right?
A spin_lock will only guarantee loads and stores inside the locked
region dont leak outside. Loads and stores before the spin_lock may leak
into the critical region. Likewise loads and stores after the
spin_unlock may leak into the critical region.
Also they dont guarantee ordering for cache inhibited loads and stores.
Anton
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next prev parent reply other threads:[~2005-01-13 21:59 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-13 20:26 Kanoj Sarcar
2005-01-13 20:39 ` William Lee Irwin III
2005-01-13 21:02 ` Kanoj Sarcar
2005-01-13 21:06 ` Andi Kleen
2005-01-13 21:29 ` Kanoj Sarcar
2005-01-13 21:59 ` Anton Blanchard [this message]
2005-01-13 23:22 ` Kanoj Sarcar
2005-01-14 20:37 ` Hugh Dickins
2005-01-14 21:14 ` Kanoj Sarcar
2005-01-14 21:38 ` Andrea Arcangeli
2005-01-14 22:09 ` Hugh Dickins
2005-01-14 22:34 ` Andrea Arcangeli
2005-01-14 21:25 ` Andrea Arcangeli
2005-01-14 21:32 ` Andrea Arcangeli
2005-01-14 22:22 ` Kanoj Sarcar
2005-01-14 22:47 ` Hugh Dickins
2005-01-14 22:51 ` Andrea Arcangeli
2005-01-14 23:14 ` Kanoj Sarcar
2005-01-14 23:26 ` Andrea Arcangeli
2005-01-14 22:36 ` Hugh Dickins
2005-01-14 23:01 ` Andrea Arcangeli
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