Samuel Thibault wrote: > Da Zheng, le Wed 23 Dec 2009 10:21:50 +0800, a écrit : >>> Anyway, deciding between shared memory or pure IPC is not really an >>> issue. I believe the more difficult part is how to make process >>> actually perform IPCs securely. It can probably be useful to check how >>> shm was implemented. >> Do you mean shm device in Linux or in Xen? > > In Hurd, the patch from Marcus Brinkmann. > (debian/patches/hurd-i386/submitted-sysvshm.diff in the debian glibc > sources) > OK, thank you.
One more thing: is it enough to only use something like spin_lock (or volatile variable + memory barrier) to protect a variable in shared memory between two processes? Zheng Da
