On Thu, 14 Apr 2016 16:42:33 -0600
Warner Losh <i...@bsdimp.com> wrote:

> The CAM I/O scheduler has been committed to current. This work is
> described in
> https://people.freebsd.org/~imp/bsdcan2015/iosched-v3.pdf though the
> default scheduler doesn't change the default (old) behavior.
> One possible issue, however, is that it also enables NCQ Trims on ada
> SSDs. There are a few rogue drives that claim support for this
> feature, but actually implement data corrupt instead of queued trims.
> The list of known rogues is believed to be complete, but some caution
> is in order.
> Warner

Thanks for you work.
But i have problem with VirtualBox if i use the kernel with option
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