Hello Andrea, On Mon, Jun 15, 2015 at 1:22 PM, Andrea Arcangeli <aarcange@xxxxxxxxxx> wrote: > This is an incremental update to the userfaultfd code in -mm. Sorry I'm late to this party. I'm curious how a ptrace monitor might use a userfaultfd to handle faults in all of its tracees. Is this possible without having each (newly forked) tracee "cooperate" by creating a userfaultfd and passing that to the tracer? Have you considered using one userfaultfd for an entire tree of processes (signaled through a flag)? Would not a process id included in the include/uapi/linux/userfaultfd.h:struct uffd_msg be sufficient to disambiguate faults? -- Patrick Donnelly -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>