Samuel Thibault wrote: [snip] > This seems odd. In the cygwin case, pagesize() would not be sufficient ??
No, in windows there is a requirement that mmap uses memory aligned to 64k (the infamous granularity). > And anyway, it should rather be > data2 = (char *) malloc (2 * 16 * pagesize); > Not only 16 (since it is further 16*pagesize -aligned). It's enough to allocate 16 x pagesize to use one page for mmap-ing (like Corinna said in one message 15/16 pages will not be aligned -- but one will). If you see the intermediate results I printed, data2 is re-aligned to 64k correctly. Anyway, I still don't know why mmap() failded. -- René Berber -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
