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Messages in this thread Complete thread (EXPERIMENTAL) |
No, you can always ask to get pages low mem bounced. Highmem is no
requirement, and if your device really can't support it there's no point
in attempting to support it. I presume there is some overhead in bouncing to lowmem? I imagine that highmem support for the HCDs wouldn't be that difficult -- they are just PCI devices, after all. I'm unclear on what "bouncing to lowmem" involves, but I'd rather avoid teaching all three HCDs a second model for addressing transfer buffers. At least until later in the 2.5 series, when we believe they'll share a lot more common code and so that new model can be taught to just ONE piece of code. Fixing bugs in one place easier than in three! Ehm I was discussing 2.5, 2.4 will always bounce the high mem pages for you so it's moot there. -- Jens Axboe | ||||||||||
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