From: Pete Zaitcev <zaitcev@redhat.com>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: zaitcev@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: How to replace bus_to_virt()?
Date: Mon, 1 May 2006 11:27:11 -0700 [thread overview]
Message-ID: <20060501112711.934f7e02.zaitcev@redhat.com> (raw)
In-Reply-To: <mailman.1146409020.11659.linux-kernel2news@redhat.com>
On Sun, 30 Apr 2006 16:52:37 +0200, Stefan Richter <stefanr@s5r6.in-berlin.de> wrote:
> The current implementation is this: Sbp2 uses bus_to_virt() to map from
> 1394 bus addresses (which are currently identical to local host bus
> addresses) to virtual addresses. [...]
Why do you think that virtual addresses must exist? In case of highmem,
most of the system memory is not even mapped anywhere. So, there's no
possible translation. However, the SCSI stack will make requests for I/O
into those unmapped areas, if your host template allows it.
-- Pete
next parent reply other threads:[~2006-05-01 18:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1146409020.11659.linux-kernel2news@redhat.com>
2006-05-01 18:27 ` Pete Zaitcev [this message]
2006-04-30 14:52 How to replace bus_to_virt()? Stefan Richter
2006-04-30 15:50 ` Arjan van de Ven
2006-04-30 23:40 ` Stefan Richter
2006-05-03 19:11 ` Guennadi Liakhovetski
2006-05-03 20:35 ` linux-os (Dick Johnson)
2006-05-03 21:01 ` Arjan van de Ven
2006-05-01 12:30 ` Segher Boessenkool
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