Messages in this thread | | | Subject | Re: [parisc-linux] Untested port of parisc_device to generic device interface | Date | Sat, 09 Nov 2002 21:01:29 -0500 | From | "J.E.J. Bottomley" <> |
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adam@yggdrasil.com said: > > I'd like to know more about what these machines look like in the real > world. Specifically, I am interested in the trade-off of having a > parameter to wback_fake_consistent so that it could be enabled or > disabled on an individual basis.
Actually, so would I. I can suspect why there might exist machines like this (say the consistent attribute is settable at the pgd level)
> I suspect that the parameter is not worth the clutter because these > "partially consistent" machines either have a large amount of > consistent memory, so the case of the allocation failing in the is not > worth supporting, or it is easy to check for consistent memory on them > with something like "if ((unsigned long) vaddr < 0xwhatever)", but I'm > just guessing.
Well, if it has to be done, it can be done by making alloc_consistent return a handle rather than an address and making wback/invalidate take the handle (but it's certainly not ideal).
James
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