Messages in this thread | | | Subject | Re: Linux 2.4.21-pre3-ac4 | From | Benjamin Herrenschmidt <> | Date | 13 Jan 2003 23:07:20 +0100 |
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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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