Date: Tue, 18 Feb 1997 19:51:17 +1100 From: Bruce Evans <bde@zeta.org.au> To: kuku@gilberto.physik.rwth-aachen.de, thorpej@nas.nasa.gov Cc: freebsd-hackers@freefall.freebsd.org Subject: Re: ccd and bounce buffers Message-ID: <199702180851.TAA02058@godzilla.zeta.org.au>
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>So, maybe I'm missing how things work in the FreeBSD world, but what >on earth does bounce buffers have to do with the ccd? The ccd is >a layered driver, which knows nothing about the underlying component >(or, at least, that's how it's _supposed_ to work, and is how it works >in NetBSD). It didn't initialize cbp->cb_buf.b_bufsize, and the bounce buffer code depends on this being initialized since b_bcount might be modified by drivers. Buffers have a lot of hair, especially in FreeBSD, and it's not clear that anywhere outside of vfs_bio.c can know how how to initialize them Perhaps cb_buf should be copied from *bp and then modified. Bruce
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