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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox