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2014-07-17T23:05:20.260824Z
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MFC:

>r267118 | imp | 2014-06-05 11:13:42 -0600 (Thu, 05 Jun 2014) | 9 lines
>The code that combines adjacent ranges for BIO_DELETEs to optimize
>trims to the device assumes the list is sorted. Don't apply the
>optimization of not sorting the queue when we have SSDs to the
>delete_queue, since it causes more discard traffic to the drive. While
>one could argue that the higher levels should coalesce the trims,
>that's not done today, so some optimization at this level is needed.
>CR: https://phabric.freebsd.org/D142

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