Re: Scsi problems in 2.5.1-pre9
David S. Miller (davem@redhat.com)
Tue, 11 Dec 2001 14:04:09 -0800 (PST)
From: Anton Blanchard <anton@samba.org>
Date: Wed, 12 Dec 2001 08:28:02 +1100
This seems to be happening because we now allow sg merging through
the BIOVEC_MERGEABLE macro. On ppc64 (and sparc64) we can coalesce two
sg entries if the first one ends on a page boundary and the next one
starts on a page boundary because we have an IO MMU. (I know that you
know this, Im just explaining it for those who dont :)
In that case you perhaps should be defining DMA_CHUNK_SIZE in
asm/dma.h :-)
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