> > Why are there over-limit dirty pages that no one is writing?
quoted text
> 
> Please do a sysrq-t, and cat /proc/vmstat during the hang.  Those
> will show us what exactly is happening.

I did and I posted relevant information from my finding --- it looped in 
balance_dirty_pages.

quoted text
> I've seen this type of hang many times, and I agree with Peter, that
> it's probably about loopback, and is fixed in 2.6.24-rc.

On 2.6.23 it could happen even without loopback --- loopback just made it 
happen very often. 2.6.24 seems ok.

Mikulas

quoted text
> Thanks,
> Miklos
> 
> 
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