Hello, Jeff. On Tue, Mar 05, 2013 at 06:39:41PM -0500, Jeff Layton wrote: > Al was in the middle of his signal handling/execve rework though and I > ran the idea past him. He pointedly told me that I was crazy for even > considering it. This is rather non-trivial to handle since it means > mucking around in a bunch of arch-specific code and dealing with all of > the weirdo corner cases. Hmmm... I tried it a couple years ago while I was working on ptrace improvements to support checkpoint-restart in userland (PTRACE_SEIZE and friends) and had a half-working code. At the time, Oleg was against the idea and something else came up so I didn't push it all the way but IIRC it didn't need to touch any arch code. It should be able to just share the existing trap path with ptrace. > Anyone up for working out how to handle a freeze event on a process > that already has a pending signal, while it's being ptraced? It's > probably best to chat with Al (cc'ed here) before you embark on this > plan since he was just in that code recently. Maybe Al sees something that I don't but AFAICS it should be doable in generic code proper and I don't think it's gonna be that hard. Oleg, are you still opposed to the idea of making freezer share trap points with ptrace? Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
