On Thu, May 12, 2016 at 11:13:11PM +0200, Kamil Rytarowski wrote: > An alternative is to go for 8192 (2*PAGE_SIZE) to mimic MINSIGSTKSZ: > > /usr/include/sys/signal.h:#define MINSIGSTKSZ 8192 /* > minimum allowable stack */
But it is not 2 * PAGE_SIZE. On some architectures, that's not even half a page! What I don't remember and what I am too lazy to look up is: do we count the guard pages as part of the stack size or not. Depending on that, the smallest possible stack for a thread is PAGE_SIZE or 3 * PAGES_SIZE. It should not be a macro as that's not a constant on some platforms. If POSIX requires such a macro to be provided, it's a bug in the standard and should be reported as such. Joerg
