On Thu, 2007-05-24 at 10:00 -0700, Christoph Lameter wrote: > On Thu, 24 May 2007, James Bottomley wrote: > > > > Going to ensure that we have a 31 bit (not 32 bit) physical address? > > > > No, unfortunately. Implementing kmalloc_mask() and kmalloc_dev() was > > something I said I'd do ... about two years ago. > > Tell me more about these ideas. Oh, it was this Kernel Summit presentation which discussed it http://licensing.steeleye.com/support/papers/kernel_summit_iommu.pdf The writeup of the session is here: http://lwn.net/Articles/144100/ The idea was basically to match an allocation to a device mask. I was going to do a generic implementation (which would probably kmalloc, check the physaddr and fall back to GFP_DMA if we were unlucky) but allow the architectures to override. However, the majority of need (except for the aacraid like devices) was solved by GFP_DMA32 James - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
