Re: PCI DMA to small buffers on cache-incoherent arch

From: Oliver Neukum (
Date: Sun Jun 09 2002 - 01:50:04 EST

> For memory --> device DMA:
> 1. write back all cache lines affected by the DMA
> 2. start the DMA
> 3. invalidate the above cache lines

Why the third step ? That data should still
be valid.

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This archive was generated by hypermail 2b29 : Sat Jun 15 2002 - 22:00:13 EST