Messages in this thread | | | Subject | Re: [PATCH] Define wc_wmb, a write barrier for PCI write combining | From | Bryan O'Sullivan <> | Date | Sat, 25 Feb 2006 09:11:57 -0800 |
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On Sat, 2006-02-25 at 09:28 -0500, Benjamin LaHaise wrote:
> sfence has no impact > on the flushing of the write combining buffers
The sfence instruction guarantees that every store that precedes it in program order is globally visible, including over the likes of the PCI bus, before any store instruction that follows the fence.
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