Don Brady

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Per @amotin -- add a zpool wait for ARC teardown

To address concerns of re-importing after the pool was changed on another host: Save txg at export and compare to imported txg - if same, then cancel the teardown (ARC...

Update on re-import while ARC tear-down in progress Ever since the commit that added `zpool reguid` feature, the ARC uses the `spa_load_guid`, not the spa's actual guid for identification. This...

> Have you looked at having `arc_evict` prioritize evicting from flushed pools vs trying to evict buffers from active pools? @grwilson I hadn't considered it other than if it was...

Rebased to fix merge conflicts. Eviction thread nows considers active spa flushes and targets those spas (if any).

Removed last commit and rebased to latest master branch.

Rebased to latest master and switched to use `taskq_dispatch_ent()`.

fixed a leak in `arc_async_flush_list()` found during module unload by `ztest`

Note that it randomly chooses the parity for each run so the ones that fail could have different parity than the ones that succeed. Looks like parity=2 is common to...

Seems to always be one 8K block that has unexpected zeros inside it on 512 byte boundaries.