From: Alan Cox <alan@redhat.com>
To: Paul Mackerras <paulus@samba.org>
Cc: David Howells <dhowells@redhat.com>,
torvalds@osdl.org, akpm@osdl.org, mingo@redhat.com,
alan@redhat.com, linux-arch@vger.kernel.org,
linuxppc64-dev@ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Document Linux's memory barriers [try #4]
Date: Thu, 9 Mar 2006 19:48:15 -0500 [thread overview]
Message-ID: <20060310004815.GD24904@devserv.devel.redhat.com> (raw)
In-Reply-To: <17424.48029.481013.502855@cargo.ozlabs.ibm.com>
On Fri, Mar 10, 2006 at 10:34:53AM +1100, Paul Mackerras wrote:
> MMIO accesses are done under a spinlock, and that if your driver is
> missing them then that is a bug. I don't think it makes sense to say
> that mmiowb is required "on some systems".
Agreed. But if it is missing it may not be a bug. It depends what the lock
actually protects.
next prev parent reply other threads:[~2006-03-10 0:48 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-09 20:29 [PATCH] Document Linux's memory barriers [try #4] David Howells
2006-03-09 23:34 ` Paul Mackerras
2006-03-09 23:45 ` Michael Buesch
2006-03-09 23:56 ` Linus Torvalds
2006-03-10 0:07 ` Michael Buesch
2006-03-10 0:48 ` Alan Cox [this message]
2006-03-10 0:54 ` Paul Mackerras
2006-03-10 15:19 ` David Howells
2006-03-11 0:01 ` Paul Mackerras
2006-03-10 5:28 ` Nick Piggin
2006-03-15 11:10 ` David Howells
2006-03-15 11:51 ` Nick Piggin
2006-03-15 13:47 ` David Howells
2006-03-15 23:21 ` Nick Piggin
2006-03-12 17:15 ` Eric W. Biederman
2006-03-14 21:26 ` David Howells
2006-03-14 21:26 ` David Howells
2006-03-14 21:48 ` Paul Mackerras
2006-03-14 21:48 ` Paul Mackerras
2006-03-14 23:59 ` David Howells
2006-03-14 23:59 ` David Howells
2006-03-15 0:20 ` Linus Torvalds
2006-03-15 1:19 ` David Howells
2006-03-15 1:47 ` Linus Torvalds
2006-03-15 1:25 ` Nick Piggin
2006-03-15 0:54 ` Paul Mackerras
2006-03-15 0:54 ` Paul Mackerras
2006-03-13 12:32 ` Sergei Organov
2006-03-14 20:31 ` David Howells
2006-03-14 21:11 ` linux-os (Dick Johnson)
2006-03-15 9:09 ` Sergei Organov
2006-03-15 9:04 ` Sergei Organov
2006-03-14 20:35 ` David Howells
2006-03-15 9:11 ` Sergei Organov
2006-03-15 14:23 ` [PATCH] Document Linux's memory barriers [try #5] David Howells
[not found] ` <20060315200956.4a9e2cb3.akpm@osdl.org>
2006-03-16 11:50 ` David Howells
2006-03-16 17:18 ` Linus Torvalds
2006-03-17 1:20 ` Nick Piggin
2006-03-16 23:17 ` Paul E. McKenney
2006-03-16 23:55 ` Linus Torvalds
2006-03-17 1:29 ` Paul E. McKenney
2006-03-17 5:32 ` Linus Torvalds
2006-03-17 6:23 ` Paul E. McKenney
2006-03-23 18:34 ` David Howells
2006-03-23 18:34 ` David Howells
2006-03-23 19:28 ` Linus Torvalds
2006-03-23 19:28 ` Linus Torvalds
2006-03-23 22:26 ` Paul E. McKenney
2006-03-23 22:26 ` Paul E. McKenney
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