i386/66966: MD devices trash system
Wim
wim at q-prime.net
Thu May 20 16:10:19 PDT 2004
>Number: 66966
>Category: i386
>Synopsis: MD devices trash system
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu May 20 16:10:19 PDT 2004
>Closed-Date:
>Last-Modified:
>Originator: Wim
>Release: 5.2.1, 5.2, 5.0
>Organization:
>Environment:
DEFAULT kernels on 5 machines
>Description:
MD devices lock up when beeing used intensively, eating up all CPU time and disabeling other programs to be executed; in the end the machines just hang; rebooting is not possible unless done by physically resetting the server by turning it off and back one. Terminating the MD device or unmounting it seems to be impossible.
>How-To-Repeat:
Manifests on all Intel P2 Celeron, P3 and P4 I've tested, but not on AMD; simply create an MD-virtual disk and use it intensively by compiling a program on it for example or building a world to it.
Tested on multiple BSD installations; though BSD 5.0 seems to have less problems with it then 5.2.1.
>Fix:
Unkown
>Release-Note:
>Audit-Trail:
>Unformatted:
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