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SubjectRE: Confirmation request about new 2.4.x. kernel limits
> Any memory over 1GB is bounce-buffered, but we don't use that memory
> for anything other than process data pages or file cache, so only
> swapping and disk IO to regular files gets the extra copy. In
> particular, things like network buffers are still all kept in the low
> 1GB so never need to be buffered.
[Venkatesh Ramamurthy] If anything over 1GB is bounce buffered than
what is the purpose of setting the pci_dev->dma_mask field. On a IA32
system we set it to 32 1's and IA64 to 64 1's - Venkat
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