USB I/O draining my userspace (Ubuntu Natty 64b)

[Raz]

i suggest you trace it. use blktrace.

On Wed, Jun 15, 2011 at 5:42 PM, Ira Abramov <Lists-Linux-IL at ira.abramov.org
> wrote:

> Quoting Yedidyah Bar-David, from the post of Wed, 15 Jun:
> >
> > Perhaps it uses USB1 and not 2?
>
> nope, I had that problem when I accidentally switched ports to a USB1
> port, the 22 minute burn took over 113 minutes before I noticed it was
> still writing and killed it.
>
> also, to answer Geoff - nothing else is on the USB, the M/K are on PS/2
> connectors. Maybe the same controller chip, but not the same bus or
> kernel module.
>
> at least with oflag=dsync it doesn't get the entire userspace stuck,
> whatever that does.
>
> bs=8M is the next parameter I'll try, or maybe I should go for 32M?
>
> > Can you rmmod all *hci_ucd modules except for ehci_hcd and see what
> > happens?
>
> nope, I assumed Ubuntu would have taken precautions not to insmod
> anything useless for my hardware...
>
> >
> > Did you try cp (or cp --sparse=always if you really want to) and
> > see if it helps? I don't know of a similar option for dd.
>
> I have here an image with partitions in it, which is why I use DD. cp
> can't help me, sadly.
>
> --
> A fetus who made it
> Ira Abramov
> http://ira.abramov.org/email/
>
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