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SubjectRe: Scsi problems in 2.5.1-pre9

Hi Jens,

> > > Incorrect number of segments after building list
> > > counted 11, received 7
> >
> > Attached patch should fix it.

I just booted 2.5.1-pre10 on ppc64 and still get the errors:

Incorrect number of segments after building list
counted 3, received 2
req nr_sec 24, cur_nr_sec 8

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 :)

Should we just remove the warning now?

Anton
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