* Linus Torvalds: > On Mon, Apr 29, 2019 at 12:55 PM Jann Horn <jannh@xxxxxxxxxx> wrote: >> >> ... I guess that already has a name, and it's called vfork(). (Well, >> except that the Linux vfork() isn't a real vfork().) > > What? > > Linux vfork() is very much a real vfork(). What do you mean? In Linux-as-the-ABI (as opposed to Linux-as-the-implementation), vfork is sometimes implemented as fork, so applications cannot rely on the vfork behavior regarding the stopped parent and the shared address space. In fact, it would be nice to have a flag we can check in the posix_spawn implementation, so that we can support vfork-as-fork without any run time cost to native Linux. Thanks, Florian
