Re: [PATCH] SN2 user-MMIO CPU migration

Brent Casavant
2006-01-24T16:57:13Z

On Tue, 24 Jan 2006, Robin Holt wrote:

> The mspec driver does. It has not gotten into the mainline kernel yet,
> but we continue to build an add-on module for the necessary releases.
> To prevent this out of order write from happening on those machines,
> we require the process to be pinned to a single cpu. For MPI, this
> is a normal way to operate for other reasons as well.

Oh, this problem affects mspec as well? I didn't realize that. You're
saying that uncached memory writes are the same as PIO writes, as far
as Shub is concerned? If so, then the patch I'm trying to work through
here should solve your problem as well.

Brent

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Brent Casavant All music is folk music. I ain't
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