From: Michel Bouissou <michel@bouissou.net>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>,
linux-kernel@vger.kernel.org
Subject: Re: VIA KT400 + Kernel 2.6.12 + IO-APIC + uhci_hcd = IRQ trouble
Date: Tue, 26 Jul 2005 00:29:41 +0200 [thread overview]
Message-ID: <200507260029.41709@totor.bouissou.net> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0507251635510.8043-100000@iolanthe.rowland.org>
Le Lundi 25 Juillet 2005 22:44, Alan Stern a écrit :
>
> Now that's strange. When you plug the high-speed device into the
> integrated ports, which IRQ counter changes? Since nothing is using IRQ
> 21, it should be disabled and its counter should remain constant. Does
> this mean the interrupts show up on IRQ 19 (used by ehci-hcd), or do they
> not show up at all (i.e., is the USB connection just being polled)?
I assume it's IRQ 19.
cat /proc/interrupts doesn't show IRQ21 at all when uhci isn't loaded.
IRQ 19 being shared with 4 IDE controllers that controls my hard drives,
that's hard to isolate interrupts counts due to USB activity from interrupts
counts due to disks activity...
--
Michel Bouissou <michel@bouissou.net> OpenPGP ID 0xDDE8AC6E
next prev parent reply other threads:[~2005-07-25 22:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <19D0D50E9B1D0A40A9F0323DBFA04ACCE04C5D@USRV-EXCH4.na.uis.unisys.com>
2005-07-17 17:58 ` Michel Bouissou
2005-07-17 20:36 ` Alan Stern
2005-07-17 21:20 ` Michel Bouissou
2005-07-17 21:51 ` Michel Bouissou
2005-07-18 16:12 ` Alan Stern
2005-07-25 18:06 ` Michel Bouissou
2005-07-25 19:18 ` Alan Stern
2005-07-25 19:31 ` Michel Bouissou
2005-07-25 20:14 ` Michel Bouissou
2005-07-25 20:44 ` Alan Stern
2005-07-25 22:29 ` Michel Bouissou [this message]
2005-07-26 1:56 ` Alan Stern
[not found] ` <200507172022.46975@totor.bouissou.net>
2005-07-19 23:09 ` Mathieu Bérard
2005-07-26 2:13 Protasevich, Natalie
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