On Wed, Oct 13, 2010 at 12:53 AM, Ralf Baechle <ralf@xxxxxxxxxxxxxx> wrote: > It's this disabling of interrupts which I don't like. ÂIt's easy to get > around it by having one kmap type for each of process, softirq and > interrupt context. I am curious as to why ARM opted for the "pte push/pop" strategy (kmap_high_l1_vipt()) instead of something along these lines? Is there a reason why using 3 kmap types to solve the "interrupted flush problem" would work for MIPS, but is not a good solution on ARM? > The good news is that Peter Zijlstra has rewritten kmap to make the need > for manually allocated kmap types go away and his patches are queued to > be merged for 2.6.37. ÂSo I'd like to put this patch on hold until after > his patches are merged. OK, I'll take a look at that. Thanks for the pointer. > Does your system have both highmem and cache aliases? This system has HIGHMEM + SMP, no cache aliases.
