Messages in this thread | | | From | Yuhong Bao <> | Subject | RE: [RFC][PATCH] Cross Memory Attach | Date | Sat, 18 Sep 2010 21:55:30 -0700 |
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> Of course, these days I would seriously suggest against trying to > optimize the kmap() case. It only matters on crap hardware these days. > Anybody running HIGHMEM in 2010 and thinks that it makes sense > deserves the pain the get. We should not complicate the kernel further > for it, and sane architectures will have a no-op kmap().
Well, keep in mind most even vaguely recent 32-bit x86 distro kernels have HIGHMEM4G enabled by default. Some recent ones even have HIGHMEM64G enabled in order to get NX support. (And yes, as I said before, there are many processors that cannot run in long mode but have NX)
Yuhong Bao
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