Btrfs: unplug every once and a while
The btrfs io submission threads can build up massive plug lists. This keeps things more reasonable so we don't hand over huge dumps of IO at once. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -295,6 +295,12 @@ loop_lock:
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btrfs_requeue_work(&device->work);
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goto done;
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}
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/* unplug every 64 requests just for good measure */
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if (batch_run % 64 == 0) {
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blk_finish_plug(&plug);
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blk_start_plug(&plug);
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sync_pending = 0;
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}
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}
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cond_resched();
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