On Tue, Aug 28, 2001 at 07:17:25PM +0200, Tom Appermont wrote: > While this works as expected on PC, it does not at all work as > expected on my mips platform (R5231): What is written in user > space is not immediately visible in kernel space. This is with > very recent kernel sources (2.4.8) but the same problem exists > with an older (2.4.5) kernel. > > There have been a few mails about mmap() problems in the last > couple of months, but with very little interesting response. Is > this a known problem or am I stupidly overlooking something? This is a different problem - and it's one caused by your code. You're missing the necessary cache flushes in the kernel code. Using _CACHE_UNCACHED is slow and breaks SMP. Ralf
