Re: [PATCH 14/26] mm: back off direct reclaim on excessive shrinker deferral

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On Wed, Oct 09, 2019 at 02:21:12PM +1100, Dave Chinner wrote:
> +			if ((reclaim_state->deferred_objects >
> +					sc->nr_scanned - nr_scanned) &&
> +			    (reclaim_state->deferred_objects >
> +					reclaim_state->scanned_objects)) {
> +				wait_iff_congested(BLK_RW_ASYNC, HZ/50);

Unfortunately, Jens broke wait_iff_congested() recently, and doesn't plan
to fix it.  We need to come up with another way to estimate congestion.



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