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"Stephen" == Stephen C Tweedie [off-list ref] writes:

Stephen> Hi, On Tue, 2003-02-11 at 13:11, Stephan van Hienen wrote:

Stephen> I've no idea.  Ben has some lb patches up at

Stephen>   http://people.redhat.com/bcrl/lb/

Stephen> but there's nothing broken out against the latest lbd diffs.


Ben's patches are against a very old version of the kernel (2.4.6-pre8) and
require linking against libgcc to get 64-bit division.


The main issue is 64-bit division.  In the limited time I had I
couldn't convince myself that I could rely on all divisors being less than
2^31 in the raid4/5 code.  If you can convince yourself of that, then t's a
straightforward but tedious task to make raid1, raid4 and raid5 LBD-safe.
--

Hi,
Is this in a speed-sensitive area?
If not, you could consider 64-bit software divide functions, such as found at
http://nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html,
which would only be used on 32-bit CPUs, of course.

--
~Randy