From: Ralf Baechle <ralf@linux-mips.org>
To: Hartvig Ekner <hartvige@mips.com>
Cc: Dominic Sweetman <dom@algor.co.uk>,
Carsten Langgaard <carstenl@mips.com>,
linux-mips@linux-mips.org
Subject: Re: Promblem with PREF (prefetching) in memcpy
Date: Fri, 4 Oct 2002 14:38:45 +0200 [thread overview]
Message-ID: <20021004143845.A15883@linux-mips.org> (raw)
In-Reply-To: <200210041233.g94CXrQ29071@copfs01.mips.com>; from hartvige@mips.com on Fri, Oct 04, 2002 at 02:33:53PM +0200
On Fri, Oct 04, 2002 at 02:33:53PM +0200, Hartvig Ekner wrote:
> this problem occurs in kernel space (kseg0), not user space. In user space
> there is no problem due to the TLB "protection" of PREFs going outside the
> process working set, but that doesn't help in kernel mode.
Assume a userspace device driver having some hardware mapped immediately
following a ordinary memory mapping. In that case it would be possible
for prefetch to run from the one into the next mapping - boom.
Ralf
next prev parent reply other threads:[~2002-10-04 12:39 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-04 7:50 Promblem with PREF (prefetching) in memcpy Carsten Langgaard
2002-10-04 11:53 ` Dominic Sweetman
2002-10-04 12:11 ` Carsten Langgaard
2002-10-04 12:35 ` Dr. David Alan Gilbert
2002-10-04 12:36 ` Alan Cox
2002-10-04 12:35 ` Carsten Langgaard
2002-10-04 13:09 ` Alan Cox
2002-10-04 13:07 ` Hartvig Ekner
2002-10-04 13:07 ` Hartvig Ekner
2002-10-04 13:00 ` Kevin D. Kissell
2002-10-04 13:00 ` Kevin D. Kissell
2002-10-04 13:15 ` Alan Cox
2002-10-04 13:15 ` Kevin D. Kissell
2002-10-04 13:15 ` Kevin D. Kissell
2002-10-04 13:44 ` Alan Cox
2002-10-04 14:17 ` Kevin D. Kissell
2002-10-04 14:17 ` Kevin D. Kissell
2002-10-04 14:54 ` Alan Cox
2002-10-04 13:01 ` Maciej W. Rozycki
2002-10-04 13:17 ` Ralf Baechle
2002-10-04 13:32 ` Maciej W. Rozycki
2002-10-04 13:29 ` Dominic Sweetman
2002-10-04 13:46 ` Maciej W. Rozycki
2002-10-04 12:33 ` Hartvig Ekner
2002-10-04 12:33 ` Hartvig Ekner
2002-10-04 12:38 ` Ralf Baechle [this message]
2002-10-04 12:36 ` Kevin D. Kissell
2002-10-04 12:36 ` Kevin D. Kissell
2002-10-04 14:24 ` Dominic Sweetman
2002-10-04 14:24 ` Dominic Sweetman
2002-10-04 23:43 ` Ralf Baechle
2002-10-05 15:12 ` Hartvig Ekner
2002-10-05 15:12 ` Hartvig Ekner
2002-10-05 15:56 ` Alan Cox
2002-10-04 12:37 ` Kevin D. Kissell
2002-10-04 12:37 ` Kevin D. Kissell
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=20021004143845.A15883@linux-mips.org \
--to=ralf@linux-mips.org \
--cc=carstenl@mips.com \
--cc=dom@algor.co.uk \
--cc=hartvige@mips.com \
--cc=linux-mips@linux-mips.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.