Re: [LSF/MM TOPIC] Congestion

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On Tue, Dec 31, 2019 at 04:59:08AM -0800, Matthew Wilcox wrote:
> 
> I don't want to present this topic; I merely noticed the problem.
> I nominate Jens Axboe and Michael Hocko as session leaders.  See the
> thread here:
> 
> https://lore.kernel.org/linux-mm/20190923111900.GH15392@xxxxxxxxxxxxxxxxxxxxxx/
> 
> Summary: Congestion is broken and has been for years, and everybody's
> system is sleeping waiting for congestion that will never clear.

Another symptom: system does not sleep because there is no recorded
congestion so it doesn't back off when it should (the
wait_iff_congested() backoff case).

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx



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