From: Ralf Baechle <ralf@linux-mips.org>
To: Fuxin Zhang <fxzhang@ict.ac.cn>
Cc: Dominic Sweetman <dom@mips.com>,
Adam Kiepul <Adam_Kiepul@pmc-sierra.com>,
linux-mips@linux-mips.org
Subject: Re: RM7k cache_flush_sigtramp
Date: Sat, 2 Aug 2003 19:02:46 +0200 [thread overview]
Message-ID: <20030802170245.GA19401@linux-mips.org> (raw)
In-Reply-To: <3F2A76CA.4080904@ict.ac.cn>
On Fri, Aug 01, 2003 at 10:18:50PM +0800, Fuxin Zhang wrote:
> I just run a fresh new 2.4.21 kernel on my board, no luck. The problem
> remains. But I notice that my hardware may have some problems,
> especially with the add-on ide card. Keep headaching...
>
> As to the discussion of SYNC, I can't help wondering whether the cache
> management should be totally hidden from programmers. People tends to
> write "safetest" code because of all kinds of brain-damage different
> hardware, which leads to inefficient code. And this will cancel out the
> potential speed benefit of simpler hardware. Also today's hardware seems
> not as expensive as it was before...
Cache managment needs to be somehow hidden from programmers as well as
possible - the average programmer has no clue about how caches work.
We've come up with an API that hides the actual functioning of caches
pretty well for DMA devices, see Documentation/DMA-mapping.txt and in
2.6 also a more generalized version documented in Documentation/DMA-API.txt.
Ralf
next prev parent reply other threads:[~2003-08-02 17:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-31 16:50 RM7k cache_flush_sigtramp Adam Kiepul
2003-08-01 0:40 ` Fuxin Zhang
2003-08-01 3:01 ` Ralf Baechle
2003-08-01 4:59 ` Fuxin Zhang
2003-08-01 7:51 ` Dominic Sweetman
2003-08-01 7:51 ` Dominic Sweetman
2003-08-01 9:26 ` Ralf Baechle
2003-08-01 14:18 ` Fuxin Zhang
2003-08-02 17:02 ` Ralf Baechle [this message]
2003-08-04 8:45 ` Dominic Sweetman
2003-08-04 11:51 ` Maciej W. Rozycki
-- strict thread matches above, loose matches on Subject: below --
2003-08-01 15:42 Adam Kiepul
2003-08-04 3:38 ` Fuxin Zhang
2003-08-06 11:00 ` Fuxin Zhang
2003-08-06 11:55 ` Ralf Baechle
2003-08-06 12:52 ` Fuxin Zhang
2003-08-06 14:45 ` Ralf Baechle
2003-08-06 15:04 ` Fuxin Zhang
2003-08-06 22:30 ` Ralf Baechle
2003-07-31 1:56 Fuxin Zhang
2003-07-31 11:46 ` Ralf Baechle
2003-07-31 12:57 ` Fuxin Zhang
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=20030802170245.GA19401@linux-mips.org \
--to=ralf@linux-mips.org \
--cc=Adam_Kiepul@pmc-sierra.com \
--cc=dom@mips.com \
--cc=fxzhang@ict.ac.cn \
--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.