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: > > > > > > 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? 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. -- Pawel Jakub Dawidek http://www.wheel.pl pjd_at_FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am!
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