Date: Thu, 10 Aug 2006 22:01:35 +0200 From: Jan Srzednicki <w@expro.pl> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-fs@FreeBSD.org, freebsd-current@FreeBSD.org, freebsd-geom@FreeBSD.org Subject: Re: GJournal (hopefully) final patches. Message-ID: <20060810200135.GF57857@europa.expro.pl> In-Reply-To: <20060810194304.GB1345@garage.freebsd.pl> References: <20060808195202.GA1564@garage.freebsd.pl> <20060810192152.GE57857@europa.expro.pl> <20060810194304.GB1345@garage.freebsd.pl>
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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: > > > > Hello, > > > > 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? > > From my tests BIO_FLUSH doesn't have huge impact on performance (if at > all), but I suspect it greatly depends on specific HW. > > 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). I see. Does that mean that all CAM-interfaced devices (like asr(4) or twa(4)) have this feature fully implemented? -- Jan Srzednicki w@expro.pl
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