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Date:      Fri, 1 May 2020 17:20:00 -0700
From:      Matthew Macy <mmacy@freebsd.org>
To:        Graham Perrin <grahamperrin@gmail.com>
Cc:        freebsd-current <freebsd-current@freebsd.org>
Subject:   Re: vfs.zfs.min_auto_ashift and OpenZFS
Message-ID:  <CAPrugNpXXPjdoLsszZwwkpooDrt44gfguJfvK4qQWEUSD7%2BhZg@mail.gmail.com>
In-Reply-To: <9592fb23-ef97-f0a2-5968-f10ae404e761@gmail.com>
References:  <9592fb23-ef97-f0a2-5968-f10ae404e761@gmail.com>

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OpenZFS doesn't have the same ashift optimization logic that FreeBSD
has. It's something that needs to be resolved before the code can be
integrated downstream.

-M

On Fri, May 1, 2020 at 11:04 AM Graham Perrin <grahamperrin@gmail.com> wrot=
e:
>
> In my sysctl.conf:
>
> vfs.zfs.min_auto_ashift=3D12
>
> =E2=80=93 if I recall correctly, the line was written automatically when =
I
> installed FreeBSD-CURRENT a year or so ago.
>
> With OpenZFS enabled:
>
> root@momh167-gjp4-8570p:~ # sysctl vfs.zfs.min_auto_ashift
> sysctl: unknown oid 'vfs.zfs.min_auto_ashift'
>
> Should I have a different line in sysctl.conf, or is
> vfs.zfs.min_auto_ashift not required with OpenZFS?
>
> Hardware: HP EliteBook 8570p, circa 2013
> <https://web.archive.org/web/20150906211950/http://www8.hp.com:80/h20195/=
v2/GetPDF.aspx/c04163744.pdf>
>
> _______________________________________________
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> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org=
"



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