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SubjectRe: [BUG] fatal hang untarring 90GB file, possibly writeback related.
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On Wed, 2011-04-27 at 12:50 -0500, James Bottomley wrote:
> To test the theory, Chris asked me to try with data=ordered.
> Unfortunately, the deadlock still shows up. This is what I get.

As another data point: I'm trying the same kernel with CONFIG_PREEMPT
enabled. This time the deadlock doesn't happen. Instead, kswapd0 gets
pegged at 99% CPU for much of the untar, but it does eventually
complete.

James




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