From: Grant Grundler <iod00d@hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: dma restriction on Itanium 2
Date: Sat, 17 Jan 2004 03:58:54 +0000 [thread overview]
Message-ID: <20040117035854.GH18103@cup.hp.com> (raw)
In-Reply-To: <1074304095.6384.13.camel@kbiswas-dt.s2iotech.com>
Kallol,
please continue to include the linux-ia64 list in your replies.
On Fri, Jan 16, 2004 at 06:35:53PM -0800, Kallol Biswas wrote:
> Yes, I was talking about under HP-UX.
>
> Just to verify, inability to do DMA over page boundary on PA-RISC
> running HP-UX was a software limitation or hardware? You are saying
> it was a hp-ux(software) limitation, right?
Yes. HPUX has a similar interface for DMA mapping but a completely
different VM subsystem. Linux guarantees contiguous physical blocks
for multi-page memory allocations. HPUX does not. The linux DMA
subsystem uses that assumption.
I'm hoping someone who is better at decoding MCA data can
take a quick look at the data you posted earlier. If no one
else does by next week, I'll work on it then.
grant
next prev parent reply other threads:[~2004-01-17 3:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-17 1:48 dma restriction on Itanium 2 Kallol Biswas
2004-01-17 2:14 ` Grant Grundler
2004-01-17 3:58 ` Grant Grundler [this message]
2004-01-17 18:47 ` Christian Hinkelbein
2004-01-19 6:14 ` Grant Grundler
2004-01-19 16:00 ` Alex Williamson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040117035854.GH18103@cup.hp.com \
--to=iod00d@hp.com \
--cc=linux-ia64@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.