On 10/11, Roland McGrath wrote: > > > Hmm. Actually, do we need any check? If another thread (or CLONE_VM task) > > already started do_coredump(), we must see SIGNAL_GROUP_EXIT when we take > > ->mmap_sem. In that case coredump_wait() does nothing but returns -EAGAIN. > > You're right again here. I'm sure the old use predates this checking in > zap_threads, so it's understandable that something different was needed for > this synchronization before.
Ugh, sorry, I was wrong. coredump_wait() initializes mm->core_done and sets mm->core_startup_done before checking SIGNAL_GROUP_EXIT. This means we have to check ->core_waiters or SIGNAL_GROUP_EXIT before calling coredump_wait(). Oleg. - 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/
