Re: [RFC] consistent_sync and non L1 cache line aligned buffers

On Tue, Jul 15, 2003 at 04:04:24PM -0700, Darin.Johnson@nokia.com wrote:

quoted

IMHO, the easiest solution is
alignment of buffers.....plus it's likely to be a performance
improvement.

True, it's the easiest solution for the kernel developer, but
requires more work from driver authors.  Which is ok, *if* it's
well documented and everyone knows buffers must be aligned,
and that's the problem.  I think some people implicitly understand
these issues, and assume that everyone else thinks the same way.

What more do you expect than the "What memory is DMA'able?" section
in Documentation/DMA-mapping.txt?

It's there to refer the developers to. Some maintainers have bugs
in their drivers/subsystems.  They just need a patch from the people
that depend on the bug fix.

I know you are now focusing on some 8xx buffer issue but the original
issue was surrounding generic SCSI subsystem bugs.

Regards,
--
Matt Porter
mporter@kernel.crashing.org

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