On Wed, 2007-06-06 at 22:20 -0400, Jeff Dike wrote: > On Thu, Jun 07, 2007 at 08:43:42AM +1000, Paul Mackerras wrote: > > What Ben was talking about was stealing a synchronous SEGV from a task > > without stopping it, and as Ben says that makes no sense. > > Intercepting a signal and stopping the task is reasonable, and that is > > what ptrace does, and I assume also UML. > > It is, but I can also see UML stealing the SEGV from the child. The > UML skas does this - a ptrace extension, PTRACE_FAULTINFO, is used to > extract page fault information from the child, and other pieces of the > patch are used to fix the fault without the child continuing until > it's fixed. So, in this case, the child never sees the SEGV.
But you use ptrace and don't steal signals with dequeue_signal() on a live other task, which is ok. Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
