Re: Raid reconstructing and process hanging in D state

[Holger Kiehl]

On Fri, 16 Oct 2009, Justin Piszcz wrote:
> Hi,
>
> I have the same problem with mdadm/raid-1, if you do not limit the speed in 
> the speed_limit_min paramter, it will starve the I/O from all other processes 
> and result in the same problem you are having.
But in my case speed_limit_min was set to 1000 and speed_limit_max was 200000
(ie. the default) and this still caused all process to hang in D-state. Only
lowering speed_limit_max helped to make the system responsive again.

> But for me I'm not sure about the reconstruction-- this happens for me during 
> a raid verify/check.
This was also the case for me, during a raid verify/check.

Holger
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