Date: Wed, 22 Mar 1995 21:49:25 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, davidg@Root.COM Cc: freebsd-hackers@freefall.cdrom.com, kuku@gilberto.physik.rwth-aachen.de Subject: Re: Why IDE is bad Message-ID: <199503221149.VAA12384@godzilla.zeta.org.au>
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>>This might explain why my Intr time is so much lower than Poul's. >>I have only 16MB, and don't use option BOUNCE_BUFFERS. The bcopy() >>for bouncing is done in a call from biodone(). biodone() is called >>from the interrupt handler, at least for the wd driver. > Bounce buffers are not used on wd-style drives. I just looked at wd.c because there's no direct call to biodone() in bt742a.c. I think it gets called from the upper layers for scsi drivers. Bruce
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