Re: CentOS 5 - problem with kernel/process: task blocked for more than 120 seconds.

[m.roth@xxxxxxxxx]

Steve Thompson wrote:
> On Wed, 11 Apr 2012, m.roth@xxxxxxxxx wrote:
>
>> Been seeing that on 6.2, also, though I've not noticed them locking up
>> (the ones that have were in a cluster, and someone could have hosed
>> memory). It got less with the latest kernel, but I'm still seeing them
>> occasionally.
>
> This is most likely a problem due to data arriving too quickly for the VM
> subsystem to flush dirty pages to disk to keep up; the kernel switches to
> synchronous mode when the dirty_ratio percentage of memory pages is used.
> You might try upping your dirty_ratio, or reducing it drastically.
>
But mine are *not* VMs.

      mark

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