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kern/39298: dd brings system to knees

>Number:         39298
>Category:       kern
>Synopsis:       dd brings system to knees
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 06 13:35:00 +0000 2008
>Originator:     Jonathan A. Kollasch
>Release:        NetBSD 4.99.71 (August 1st)
System: NetBSD 4.99.71 NetBSD 4.99.71 (SIWENNA) #0: Fri 
Aug 1 05:06:05 UTC 2008 i386
Architecture: i386
Machine: i386
System responsiveness can be significantly hindered by certian usage patterns,
such as moving a large number of large chunks of /dev/zero to /dev/null.
dd if=/dev/zero of=/dev/null bs=100m count=1000

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