Date: Mon, 8 Nov 2004 07:58:32 +1100 From: <freebsd@newmillennium.net.au> To: "'Lukas Ertl'" <le@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: RE: Gvinum RAID5 performance Message-ID: <012b01c4c50c$8a857ce0$0201000a@riker> In-Reply-To: <20041107113342.K570@korben.prv.univie.ac.at>
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> -----Original Message----- > From: owner-freebsd-current@freebsd.org > [mailto:owner-freebsd-current@freebsd.org] On Behalf Of Lukas Ertl > Sent: Sunday, 7 November 2004 9:41 PM > To: freebsd@newmillennium.net.au > Cc: 'Greg 'groggy' Lehey'; freebsd-current@FreeBSD.org > Subject: RE: Gvinum RAID5 performance > > > It seems we are holding back all requests to a currently active > > stripe, even if it is just a read and would never write > anything back. > > No, only writes are held back. pbp->bio_driver1 is NULL when it's a > normal read. Ok, my bad. I'll keep looking to see where the bottleneck is. -- Alastair D'Silva mob: 0413 485 733 Networking Consultant fax: 0413 181 661 New Millennium Networking web: http://www.newmillennium.net.au
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