Messages in this thread | | | Date | Mon, 4 Jun 2007 11:45:52 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: __get_free_pages: can GFP_DMA omit GFP_KERNEL and GFP_ATOMIC? |
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On Sun, 3 Jun 2007, Robert P. J. Day wrote:
> first, can a call to __get_free_pages to allocate DMA-able memory > omit specifying either of GFP_KERNEL or GFP_ATOMIC? love's book on > kernel development strongly suggests you need to specify one or the > other, but there are a few instances in the tree like this:
Sure that seems to be equivalent to GFP_ATOMIC with no access to emergency pool memory.
> and, second, i only noticed this as i was going to submit a short > patch to replace __get_free_pages calls for DMA-able memory with the > existing equivalent macro __get_dma_pages. is that still considered a > worthwhile cleanup? there's not that many examples of it, and it > would just make things consistent.
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