Date: Fri, 11 Aug 2006 00:39:01 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Jan Srzednicki <w@expro.pl> Cc: freebsd-fs@FreeBSD.org, freebsd-current@FreeBSD.org, freebsd-geom@FreeBSD.org Subject: Re: GJournal (hopefully) final patches. Message-ID: <20060810223901.GC1389@garage.freebsd.pl> In-Reply-To: <20060810200135.GF57857@europa.expro.pl> References: <20060808195202.GA1564@garage.freebsd.pl> <20060810192152.GE57857@europa.expro.pl> <20060810194304.GB1345@garage.freebsd.pl> <20060810200135.GF57857@europa.expro.pl>
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--2JFBq9zoW8cOFH7v Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 10, 2006 at 10:01:35PM +0200, Jan Srzednicki wrote: > On Thu, Aug 10, 2006 at 09:43:04PM +0200, Pawel Jakub Dawidek wrote: > > On Thu, Aug 10, 2006 at 09:21:52PM +0200, Jan Srzednicki wrote: > > >=20 > > > Hello, > > >=20 > > > I'd happily perform some testing, only if the aac(4) driver would also > > > be patched. I know I can run gjournal w/o the BIO_FLUSH feature, but > > > that would make any performance results rather worthles, wouldn't it? > >=20 > > From my tests BIO_FLUSH doesn't have huge impact on performance (if at > > all), but I suspect it greatly depends on specific HW. > >=20 > > Unfortunately I'm not able to implement BIO_FLUSH to all out storage > > drivers. Currently BIO_FLUSH is supported by ata(4) (/dev/a[dr]X), > > da(4) and amr(4). >=20 > I see. Does that mean that all CAM-interfaced devices (like asr(4) or > twa(4)) have this feature fully implemented? That's the theory. I'm using standard SCSI commands for this. From the tests we made it seems that it works ok with twa(4)/twe(4). I'd still be glad if someone with SCSI/CAM foo could look at the code. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --2JFBq9zoW8cOFH7v Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (FreeBSD) iD8DBQFE27WFForvXbEpPzQRAsFkAJ46DsXZV5L5AUJiHiS7eiB0rdAFowCeOdTb r2YyP364McN1aci/YjNokQs= =XR71 -----END PGP SIGNATURE----- --2JFBq9zoW8cOFH7v--
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