[openib-general] Re: [PATCH 53 of 53] ipath - add memory barrier when waiting for writes

[Roland Dreier]

    ralphc> I didn't try calling barrier() so I don't know the answer.
    ralphc> When power is restored, I can try it.  My guess is that
    ralphc> it's a timing issue and not a code reordering issue.

Hmm, then we really better understand what's going on, because
otherwise you're just going to have trouble again if someone makes a
CPU with a faster mfence instruction...