From: Rene Herman <rene.herman@keyaccess.nl>
To: Mark Lord <lkml@rtr.ca>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: External USB2 HDD affects speed hda
Date: Wed, 01 Jun 2005 20:30:23 +0200 [thread overview]
Message-ID: <429DFEBF.8090908@keyaccess.nl> (raw)
In-Reply-To: <429DA0A9.6010808@rtr.ca>
Mark Lord wrote:
> Look at "cat /proc/interrupts" and see if the USB is sharing
> an IRQ line with ide0. If so, then the best explanation I can
> see is that the USB driver must have a *really slow* interrupt
> handler up to the point where it determines that the interrupt
> is not for it.
No, that's not it. Both ide0 (14) and EHCI (3) are on private, unshared
IRQs. rmmodding ehci_hcd as per Pavel's sugestion gets me back my speed.
Exactly _why_ I've no idea though. I've just added you to the CC on that
reply...
Rene.
next prev parent reply other threads:[~2005-06-01 18:50 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-30 23:21 External USB2 HDD affects speed hda Rene Herman
2005-06-01 8:18 ` Pavel Machek
2005-06-01 18:25 ` Rene Herman
2005-06-01 19:40 ` David Brownell
2005-06-01 22:14 ` Rene Herman
2005-06-01 22:33 ` Rene Herman
2005-06-01 23:43 ` David Brownell
2005-06-02 1:23 ` Mikulas Patocka
2005-06-02 2:17 ` David Brownell
2005-06-02 13:19 ` Rene Herman
2005-08-05 22:34 ` Rene Herman
2005-09-17 2:36 ` David Brownell
2005-09-17 14:45 ` Rene Herman
2005-12-12 23:24 ` Rene Herman
2005-06-02 13:57 ` Lennart Sorensen
2005-06-02 13:11 ` Rene Herman
2005-06-02 20:37 ` Lennart Sorensen
2005-06-02 22:49 ` Grant Coady
2005-06-02 23:56 ` Rene Herman
2005-06-03 0:54 ` David Brownell
2005-06-01 11:48 ` Mark Lord
2005-06-01 18:30 ` Rene Herman [this message]
2005-06-01 19:15 ` Petr Vandrovec
2005-06-01 19:45 ` Rene Herman
2005-06-01 20:37 ` David Brownell
2005-06-01 22:24 ` Rene Herman
2005-06-01 23:40 ` David Brownell
-- strict thread matches above, loose matches on Subject: below --
2005-12-21 7:08 Helmut Toplitzer
2005-12-21 8:10 ` Rene Herman
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