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Date:      Fri, 10 Nov 2023 15:20:34 -0500
From:      Michael Butler <imb@protected-networks.net>
To:        freebsd-current <freebsd-current@freebsd.org>
Subject:   mrsas scatter/gather tunable?
Message-ID:  <4912d86e-1a0a-48a9-b2f9-44f5241243d6@protected-networks.net>

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I have a couple of RAID arrays attached to an old(-ish) LSI 9285CV-8e 
controller and, while doing a backup between them, I seem to be running 
into a driver/controller resource issue :-(

Every 5 minutes when a 'health check' runs, it logs a shower of "mrsas0: 
Cannot allocate ioctl data mem" messages. This seems to be as a result 
of running into the 16 s/g buffer limit for pass-through IOCTLs used by 
smartd and/or storcli.

There doesn't appear to be any data corruption, just annoying log lines.

Has anyone else run into this?

	Michael



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