On Tue, 1 Mar 2005, Prakash Bhurke wrote: > I am trying to map a vmalloc kernel buffer to user > space using remap_page_range(). In my module, this > function returns success if we call mmap() from user > space, but i can not access content of vmalloc buffer > from user space. Pointer returned by mmap() syscall > seems pointing to other memory page which contains > zeros. I am using linux 2.6.10 kernel on Pentium 4 > system.
Look for "rvmalloc" in various drivers in the kernel source tree: you must SetPageReserved before remap_pfn_range (or remap_page_range) agrees to map the page, and ClearPageReserved before freeing after. Hugh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/