From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Ingo Molnar <mingo@elte.hu>
Cc: William Lee Irwin III <wli@holomorphy.com>, V13 <v13@priest.com>,
Jesse Barnes <jbarnes@engr.sgi.com>,
Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org,
Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: 2.6.8-rc3-mm2
Date: Tue, 10 Aug 2004 14:39:40 +0100 [thread overview]
Message-ID: <20040810143940.D20890@flint.arm.linux.org.uk> (raw)
In-Reply-To: <20040810131628.GA28167@elte.hu>; from mingo@elte.hu on Tue, Aug 10, 2004 at 03:16:28PM +0200
On Tue, Aug 10, 2004 at 03:16:28PM +0200, Ingo Molnar wrote:
>
> * Russell King <rmk+lkml@arm.linux.org.uk> wrote:
>
> > Except serial console IO does not generate _any_ IRQ traffic - it
> > purposely disables IRQs on the device before starting any IO to
> > prevent any user-level IO interfering with the console output.
>
> indeed - but it does generate _some_ IRQ traffic still:
>
> 3: 251 IO-APIC-edge serial
>
> this is from a box that uses the serial line only for the kernel
> console.
If the IRQ is claimed, userspace has opened the port. Is a getty
running on the port? If so, it would've written some messages to
the port, which would have caused these interrupts.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/
2.6 Serial core
next prev parent reply other threads:[~2004-08-10 13:52 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-08 22:29 2.6.8-rc3-mm2 Andrew Morton
2004-08-08 22:55 ` 2.6.8-rc3-mm2 Brice Goglin
2004-08-08 23:04 ` 2.6.8-rc3-mm2 Andrew Morton
2004-08-08 23:17 ` 2.6.8-rc3-mm2 Andrew Morton
2004-08-09 2:17 ` [patch] 2.6.8-rc3-mm2: sk98lin/skge.c doesn't compile with PROC_FS=n Adrian Bunk
2004-08-09 5:14 ` 2.6.8-rc3-mm2 (compile stats) John Cherry
2004-08-09 8:20 ` 2.6.8-rc3-mm2 Rick Lindsley
2004-08-09 8:25 ` 2.6.8-rc3-mm2 Andrew Morton
2004-08-09 8:29 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-09 8:33 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-09 8:43 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-09 8:49 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-09 10:36 ` 2.6.8-rc3-mm2 Espen Fjellvær Olsen
2004-08-09 12:14 ` 2.6.8-rc3-mm2 Vladimir V. Saveliev
2004-08-09 17:51 ` 2.6.8-rc3-mm2 Hans Reiser
2004-08-09 17:50 ` 2.6.8-rc3-mm2 Johannes Stezenbach
2004-08-09 18:22 ` 2.6.8-rc3-mm2 Jesse Barnes
2004-08-09 18:25 ` 2.6.8-rc3-mm2 Andrew Morton
2004-08-09 18:32 ` 2.6.8-rc3-mm2 Jesse Barnes
2004-08-09 19:17 ` 2.6.8-rc3-mm2 Jesse Barnes
2004-08-09 19:53 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-09 20:43 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-09 21:10 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-09 22:45 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 6:34 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 8:02 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 8:30 ` 2.6.8-rc3-mm2 Ingo Molnar
2004-08-10 8:56 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 9:00 ` 2.6.8-rc3-mm2 Ingo Molnar
2004-08-10 9:06 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 8:04 ` 2.6.8-rc3-mm2 Ingo Molnar
2004-08-10 8:08 ` 2.6.8-rc3-mm2 Ingo Molnar
2004-08-10 8:17 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 8:23 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 9:00 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 9:38 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 10:02 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 11:53 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 12:52 ` 2.6.8-rc3-mm2 V13
2004-08-10 12:51 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 12:55 ` 2.6.8-rc3-mm2 Ingo Molnar
2004-08-10 12:56 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 13:01 ` 2.6.8-rc3-mm2 Ingo Molnar
2004-08-10 13:10 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 13:12 ` 2.6.8-rc3-mm2 Russell King
2004-08-10 13:16 ` 2.6.8-rc3-mm2 Ingo Molnar
2004-08-10 13:39 ` Russell King [this message]
2004-08-10 13:48 ` 2.6.8-rc3-mm2 Ingo Molnar
2004-08-10 6:32 ` 2.6.8-rc3-mm2 William Lee Irwin III
2004-08-10 8:34 ` 2.6.8-rc3-mm2 Rick Lindsley
2004-08-10 14:55 ` 2.6.8-rc3-mm2 Martin J. Bligh
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