From: Oliver Neukum <oliver@neukum.org>
To: Alexander Hoogerhuis <alexh@ihatent.com>
Cc: David Brownell <david-b@pacbell.net>, linux-kernel@vger.kernel.org
Subject: Re: USB 2.0 with 250Gb disk and insane loads
Date: Sun, 1 Jun 2003 20:21:40 +0200 [thread overview]
Message-ID: <200306012021.41147.oliver@neukum.org> (raw)
In-Reply-To: <87k7c5g738.fsf@lapper.ihatent.com>
> > Probably the block layer as it waits for free io slots.
> > But that doesn't tell us why the requests are not executed.
> > Where is SCSI timeout kicking in?
>
> I'm not seeing any scsi timeouts in the logs.
So it seems that the driver doesn't fail utterly, but crawls along.
Storage's debugging output should clarify the situation.
[..]
> > Could you try on USB1.1 only?
>
> Stuck it in an older machine on USB 1.1 and it foudn the disk fine
> (redhat 9, 2.4.20-13.9 kernel on that machine), and ditto result:
>
> 19:15:16 up 2 days, 20:23, 4 users, load average: 6.02, 2.41, 0.89
> 58 processes: 55 sleeping, 3 running, 0 zombie, 0 stopped
> CPU states: 0.2% user 4.0% system 0.0% nice 0.0% iowait 95.8% idle
> Mem: 385040k av, 380820k used, 4220k free, 0k shrd, 67368k
> buff 224720k active, 69412k inactive
> Swap: 521632k av, 80k used, 521552k free 237452k
> cached
>
> and generating about 2500 interrupts for the usb controller per 10
> seconds and when i finally break it off and give it "sync" it uses
> about two minutes with about 4500 per 10 seconds to get it all on
> disk. On 2.4 the machine becomes more and more sluggish if I let it go
> more than a short minute.
Which 2.4 ?
Regards
Oliver
next prev parent reply other threads:[~2003-06-01 18:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-01 14:31 USB 2.0 with 250Gb disk and insane loads David Brownell
2003-06-01 14:53 ` Oliver Neukum
2003-06-01 15:17 ` Alexander Hoogerhuis
2003-06-01 18:21 ` Oliver Neukum [this message]
2003-06-02 6:51 ` Alexander Hoogerhuis
2003-06-02 14:03 ` Alexander Hoogerhuis
2003-06-02 17:13 ` David Brownell
2003-06-02 17:17 ` Alexander Hoogerhuis
2003-06-03 11:49 ` Terje Malmedal
2003-06-01 14:57 ` Alexander Hoogerhuis
2003-06-13 20:19 ` David Brownell
-- strict thread matches above, loose matches on Subject: below --
2003-06-01 13:47 Alexander Hoogerhuis
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