Hi Andi, On Feb 8, 2008 1:55 PM, Andi Kleen <[EMAIL PROTECTED]> wrote: > Also i'm not sure how you handle initializedness of DMAed data > (like network buffers). Wouldn't you need hooks into pci_dma_* > for this?
If the DMA'd memory is allocated from the page allocator, we don't need to worry about it just yet. In case it's from kmalloc() you can pass __GFP_NOTRACK to annotate those call sites where the memory is filled by DMA (memory that is read needs to be initialized by the caller obviously). There was some discussion with Ingo of a __GFP_DMAFILL annotation to tag those call sites instead of __GFP_NOTRACK which would work the same way. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
