From owner-freebsd-scsi@FreeBSD.ORG  Wed Oct 17 21:52:08 2012
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From: Matthew Jacob <mj@feral.com>
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Subject: Re: bioq_disksort() on SSDs
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This may be a good idea- but I think it needs a tunable. Not all SSDs 
actually want or should be given an 'as arrived' order of execution. So 
much so in fact that my $JOB is having me do log structured writes to an 
SSD.