Re: Linux 2.4.21-pre3-ac4

[Benjamin Herrenschmidt <benh _at_ xxxxxxxxxxxxxxxxxxx>]

On Mon, 2003-01-13 at 22:40, Richard B. Johnson wrote:

> There is a well-defined procedure for this. Any "read" anywhere
> in the PCI address space, will force all posted writes to complete.
> However, the "read" will not be the data one would obtain after
> the write completes. 

Just to avoid confusion, the above is obviously wrong, the read will
indeed force pending store queues to complete _in order_, the read will
reach the device after the stores are complete and you'll read the value
you would get after the write normally. At least on PCI ;)

Ben.

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