site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com On Mar 18, 2006, at 8:31 PM, Shashi Rao wrote: You don't. If you were to COW them, it wouldn't be "common" anymore. = Mike _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... * Mike Smith <drivers@mu.org> [2006-03-18 13:23:32-0800]: | | On Mar 18, 2006, at 12:41 PM, Shashi Rao wrote: | | >Why can't I write to the commpage on my G5 running Tiger? Does it | >not have COW semantics? | | Obviously, no. | | Communication via the commpage is one-way (kernel -> global userspace). How do I breakpoint a child process in the commpage then? Is there a reason the kernel engineers decided to not allow COW on these pages? As I noted above, the commpage is used for communication from the kernel to all user tasks. This email sent to site_archiver@lists.apple.com