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SubjectRe: Temporary lockup on loopback block device
> > Why are there over-limit dirty pages that no one is writing?
>
> 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.

> 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

> Thanks,
> Miklos
>
>
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