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Date: Thu, 7 Apr 2011 14:00:45 -0700
Message-ID: <BANLkTik7Pj5NiEM+Neu=neknTxshwcmk-g@mail.gmail.com>
From: Garrett Cooper <yanegomi@gmail.com>
To: Alexander Best <arundel@freebsd.org>
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Cc: svn-src-head@freebsd.org, Alexander Motin <mav@freebsd.org>,
	src-committers@freebsd.org, svn-src-all@freebsd.org
Subject: Re: svn commit: r220412 - in head: share/man/man4 sys/cam/ata
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On Thu, Apr 7, 2011 at 12:03 PM, Alexander Best <arundel@freebsd.org> wrote=
:
> On Thu Apr =A07 11, Alexander Motin wrote:
>> Author: mav
>> Date: Thu Apr =A07 08:17:53 2011
>> New Revision: 220412
>> URL: http://svn.freebsd.org/changeset/base/220412
>>
>> Log:
>> =A0 Make ada(4) driver to control device write cache, same as ata(4) doe=
s.
>> =A0 Add kern.cam.ada.write_cache sysctl/tunable to control it alike hw.a=
ta.wc.
>
> how hard would it be to support per device sysctls/tunables? i'd really l=
ike to
> do:
>
> kern.cam.ada.0.write_cache=3D0 (root fs)
> kern.cam.ada.1.write_cache=3D1 (/usr, /var, etc.)

Does it really make sense to turn on write caching for one drive and
not the other(s)?
Thanks,
-Garrett