From: Oliver Neukum <oliver@neukum.name>
To: Tom Rini <trini@kernel.crashing.org>, Roland Dreier <roland@topspin.com>
Cc: "David S. Miller" <davem@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: PCI DMA to small buffers on cache-incoherent arch
Date: Mon, 10 Jun 2002 19:22:26 +0200 [thread overview]
Message-ID: <200206101922.26985.oliver@neukum.name> (raw)
In-Reply-To: <52d6v19r9n.fsf@topspin.com> <523cvv9laj.fsf@topspin.com> <20020610170309.GC14252@opus.bloom.county>
> > So is the consensus now that in general drivers should make sure any
> > buffers passed to pci_map/unmap are aligned to SMP_CACHE_BYTES (and a
> > multiple of SMP_CACHE_BYTES in size)? In other words if a driver uses
> > an unaligned buffer it should be fixed unless we can prove (and
> > document in a comment :) that it won't cause problems on an arch
> > without cache coherency and with a writeback cache.
>
> And how about we don't call it SMP_CACHE_BYTES too? The processors
> where this matters certainly aren't doing SMP...
Definitely we should call it something different so we can limit it to
architectures that need it.
Regards
Oliver
next prev parent reply other threads:[~2002-06-10 17:22 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-08 20:38 PCI DMA to small buffers on cache-incoherent arch Roland Dreier
2002-06-08 13:58 ` Anton Blanchard
2002-06-09 0:52 ` Roland Dreier
2002-06-08 23:03 ` David S. Miller
2002-06-09 0:40 ` Roland Dreier
2002-06-09 0:53 ` David S. Miller
2002-06-09 1:26 ` Roland Dreier
2002-06-09 5:29 ` David S. Miller
2002-06-09 6:16 ` Roland Dreier
2002-06-10 16:03 ` Roland Dreier
2002-06-11 14:04 ` David Woodhouse
2002-06-09 6:45 ` Oliver Neukum
2002-06-10 4:24 ` David S. Miller
2002-06-10 10:00 ` Oliver Neukum
2002-06-10 10:24 ` David S. Miller
2002-06-09 9:51 ` Paul Mackerras
2002-06-09 10:54 ` Benjamin Herrenschmidt
2002-06-10 4:27 ` David S. Miller
2002-06-10 15:59 ` Roland Dreier
2002-06-10 17:03 ` Tom Rini
2002-06-10 17:22 ` Oliver Neukum [this message]
2002-06-10 17:29 ` Tom Rini
2002-06-10 17:39 ` Oliver Neukum
2002-06-10 19:03 ` Roland Dreier
2002-06-10 19:14 ` Tom Rini
2002-06-10 19:21 ` Roland Dreier
2002-06-10 19:26 ` Tom Rini
2002-06-10 17:57 ` Russell King
2002-06-10 17:28 ` Roland Dreier
2002-06-10 18:07 ` William Jhun
2002-06-10 18:29 ` William Jhun
2002-06-10 18:33 ` Mark Zealey
2002-06-10 18:44 ` Oliver Neukum
2002-06-11 3:10 ` David S. Miller
2002-06-11 4:04 ` Roland Dreier
2002-06-11 4:16 ` Brad Hards
2002-06-11 4:24 ` Roland Dreier
2002-06-11 4:24 ` David S. Miller
2002-06-11 4:21 ` David S. Miller
2002-06-11 4:39 ` Roland Dreier
2002-06-11 4:38 ` David S. Miller
2002-06-11 6:23 ` Oliver Neukum
2002-06-11 6:38 ` David S. Miller
2002-06-11 7:38 ` Oliver Neukum
2002-06-11 7:36 ` David S. Miller
2002-06-11 7:43 ` David S. Miller
2002-06-11 8:07 ` Oliver Neukum
2002-06-11 8:15 ` David S. Miller
2002-06-11 12:06 ` Oliver Neukum
2002-06-11 12:04 ` David S. Miller
2002-06-11 14:23 ` Oliver Neukum
2002-06-14 4:14 ` David S. Miller
2002-06-11 18:26 ` Roland Dreier
2002-06-11 17:29 ` Benjamin Herrenschmidt
2002-06-12 12:02 ` Oliver Neukum
2002-06-11 20:06 ` Benjamin Herrenschmidt
2002-06-12 12:02 ` David S. Miller
2002-06-11 23:00 ` Thunder from the hill
2002-06-11 23:56 ` Roland Dreier
2002-06-12 0:09 ` Thunder from the hill
2002-06-11 15:57 ` William Jhun
2002-06-12 9:06 ` Pavel Machek
2002-06-12 20:16 ` David S. Miller
2002-06-12 11:47 ` David S. Miller
2002-06-12 12:08 ` Oliver Neukum
2002-06-14 4:41 ` David S. Miller
2002-06-12 16:09 ` William Jhun
2002-06-09 1:30 ` Albert D. Cahalan
2002-06-09 5:29 ` David S. Miller
2002-06-09 6:33 ` Albert D. Cahalan
2002-06-09 6:50 ` Oliver Neukum
2002-06-09 6:57 ` Albert D. Cahalan
2002-06-09 7:15 ` Oliver Neukum
2002-06-09 8:48 ` Russell King
2002-06-09 15:42 ` Albert D. Cahalan
2002-06-09 23:26 ` Oliver Neukum
-- strict thread matches above, loose matches on Subject: below --
2002-06-11 5:31 David Brownell
2002-06-11 5:44 ` David S. Miller
2002-06-11 15:12 ` David Brownell
2002-06-11 15:44 ` Oliver Neukum
2002-06-12 3:25 ` David S. Miller
2002-06-11 17:33 ` Benjamin Herrenschmidt
2002-06-12 9:42 ` David S. Miller
2002-06-12 14:14 ` David Brownell
2002-06-12 15:00 ` Benjamin Herrenschmidt
2002-06-12 18:44 ` Roland Dreier
2002-06-12 19:13 ` David Brownell
2002-06-12 19:58 ` Oliver Neukum
2002-06-12 22:51 ` David S. Miller
2002-06-12 23:17 ` Oliver Neukum
2002-06-13 4:57 ` David Brownell
2002-06-12 22:46 ` David S. Miller
2002-06-13 5:13 ` David Brownell
2002-06-13 9:38 ` David S. Miller
2002-06-12 22:50 ` David S. Miller
2002-06-12 6:25 ` David Brownell
2002-06-12 6:24 ` David S. Miller
2002-06-12 7:06 ` David Brownell
2002-06-12 9:22 ` David S. Miller
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