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

From: David S. Miller (
Date: Mon Jun 10 2002 - 23:38:51 EST

   From: Roland Dreier <>
   Date: 10 Jun 2002 21:39:27 -0700

       David> How about allocating struct something using pci_pool?
   The problem is the driver can't safely touch field1 or field2 near the
   DMA (it might pull the cache line back in too soon, or dirty the cache
   line and have it written back on top of DMA'ed data)

Oh duh, I see, then go to making the thing a pointer to the
dma area.
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This archive was generated by hypermail 2b29 : Sat Jun 15 2002 - 22:00:20 EST