Hello Al Viro > close_on_exec_init is an array, and this assignment stores the address > of its first (and only) element into newf->fdtab.close_on_exec. So it's > basically > newf->fdtab.close_on_exec = &newf->close_on_exec_init[0]; > > ->fdtab and ->close_on_exec_init are to be used only if we need no more than > BITS_PER_LONG descriptors. It's common enough to make avoiding a separate > allocation (and separate cacheline on following the pointer chain) worth > the trouble > ... > ... Fascinating, thank you for this very informative response. I have learned a lot from it.
