Re: [Bugme-new] [Bug 34132] New: System is unresponsive while using dd to copy DVD ISO to USB stick/key

Re: [Bugme-new] [Bug 34132] New: System is unresponsive while using dd to copy DVD ISO to USB stick/key

[Andrew Morton]

In case anyone was wondering if we've stopped sucking yet.

On Sat, 30 Apr 2011 16:12:15 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=34132
> 
>            Summary: System is unresponsive while using dd to copy DVD ISO
>                     to USB stick/key
>            Product: IO/Storage
>            Version: 2.5
>     Kernel Version: 2.6.38.2
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: high
>           Priority: P1
>          Component: Other
>         AssignedTo: io_other@kernel-bugs.osdl.org
>         ReportedBy: jlp.bugs@gmail.com
>         Regression: No
> 
> 
> When I use
> 
> dd if=<some_iso_file> of=<device_of_usb_key>
> 
> The system becomes very unresponsive. X is almost completely unusable, maybe
> you can move a mouse for some time but click do nothing. Even togling the Caps
> Lock doesn't do anything. Trying to SSH is also almost impossible during this.
> System is like this all the time while using the dd command. After it finishes
> system again becomes responsive. I've noticed this on two of my computers:
> 1: AMD Athlon 64 3000+, 2 GB of memory, kernel 2.6.38.2
> 2: AMD Athlon II P320 Dual-Core, 4 GB of memory, kernel 2.6.39-rc2
> The USB key is this one:
> http://www.takems.com/products.php?categ=usb&prod=MEM-Drive_Easy_II
> 
> What I expected was that the doing dd wouldn't have a noticable impact on
> responsivness of the rest of the system.
> 

Maybe it's not VM-related.  This time.  Maybe.

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