From: "Joakim Tjernlund" <Joakim.Tjernlund@lumentis.se>
To: "Dan Malek" <dan@embeddededge.com>,
"Tom Rini" <trini@kernel.crashing.org>
Cc: "Jean-Denis Boyer" <jdboyer@m5t.com>,
"Steffen Rumler" <Steffen.Rumler@siemens.com>,
"linuxppc" <linuxppc-embedded@lists.linuxppc.org>
Subject: Re: Problem of concurrency in arch/ppc/8260_io/uart.c
Date: Sat, 27 Sep 2003 00:39:48 +0200 [thread overview]
Message-ID: <006f01c3847f$17943dd0$020120b0@jockeXP> (raw)
In-Reply-To: 3F74BBC5.3010302@embeddededge.com
> Tom Rini wrote:
>
> > KGDB still works for me. Dan, any final thoughts / comments /
> > objections?
>
> In the last patch I saw, we are blocking interrupts for quite a while,
> across a copy_from_user(), in 8xx_write().
Yes, thats correct. I did try different ways around that but the only thing that
would work is to make copy_from_user() copy to i tmp buf and then copy the
tmp buf into the BD. Would that be better?
Jocke
> This can cause large
> interrupt latencies due to page faults, it would be nice if could fix that.
>
> -- Dan
>
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-09-26 22:39 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-15 16:26 Problem of concurrency in arch/ppc/8260_io/uart.c Jean-Denis Boyer
2003-09-15 18:37 ` Joakim Tjernlund
2003-09-15 18:53 ` Dan Malek
2003-09-15 20:02 ` Joakim Tjernlund
2003-09-16 12:25 ` Joakim Tjernlund
2003-09-17 9:33 ` Joakim Tjernlund
2003-09-17 13:38 ` Joakim Tjernlund
2003-09-17 14:58 ` Dan Malek
2003-09-17 15:22 ` Joakim Tjernlund
2003-09-17 16:33 ` Joakim Tjernlund
2003-09-23 8:28 ` Joakim Tjernlund
2003-09-26 16:31 ` Tom Rini
2003-09-26 18:34 ` Joakim Tjernlund
2003-09-26 18:38 ` Tom Rini
2003-09-26 21:24 ` Tom Rini
2003-09-26 22:20 ` Dan Malek
2003-09-26 22:39 ` Joakim Tjernlund [this message]
2003-09-26 23:12 ` Dan Malek
2003-09-27 8:07 ` Joakim Tjernlund
2003-09-27 13:43 ` Joakim Tjernlund
2003-09-29 15:33 ` Tom Rini
2003-09-30 15:28 ` Dan Malek
2003-10-01 14:26 ` Kumar Gala
2003-10-01 14:32 ` Tom Rini
2003-10-01 14:48 ` Gary Thomas
2003-10-01 21:20 ` Joakim Tjernlund
2003-10-01 21:32 ` Tom Rini
2003-10-01 21:51 ` Joakim Tjernlund
2003-10-01 22:00 ` Tom Rini
2003-10-01 22:17 ` Joakim Tjernlund
2003-10-01 22:31 ` Tom Rini
2003-10-01 23:23 ` Robin Gilks
2003-10-01 23:51 ` Tom Rini
2003-10-02 0:47 ` Wolfgang Denk
2003-10-02 6:03 ` Dan Kegel
2003-10-02 19:15 ` Tom Rini
[not found] <3F8E8817.5ACD7ACB@siemens.com>
2003-10-16 14:11 ` Joakim Tjernlund
-- strict thread matches above, loose matches on Subject: below --
2003-09-15 10:18 Steffen Rumler
2003-09-15 13:30 ` Joakim Tjernlund
2003-03-07 15:18 Jean-Denis Boyer
2003-03-07 12:52 Dayton, Dean
2003-03-06 21:39 Jean-Denis Boyer
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