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SubjectRe: 2.6.23.1: mdadm/raid5 hung/d-state
Justin Piszcz wrote:
> # ps auxww | grep D
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
> root 273 0.0 0.0 0 0 ? D Oct21 14:40 [pdflush]
> root 274 0.0 0.0 0 0 ? D Oct21 13:00 [pdflush]
>
> After several days/weeks, this is the second time this has happened,
> while doing regular file I/O (decompressing a file), everything on the
> device went into D-state.

The next time you come across something like that, do a SysRq-T dump and
post that. It shows a stack trace of all processes - and in particular,
where exactly each task is stuck.

/mjt
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