site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Can anyone explain what the function thread_funnel_set() does? Is it some means of synchronization/locking mechanism to critical kernel data structures?? Fore pre-Tiger, yes, thread funnels were basically giant locks. There was one for networking and one for everything else in the BSD kernel. I'm surprised that they are still in Tiger, as that is supposed to be one of the big changes in the Tiger kernel: no more funnels. I can only surmise that they are there for some kind of backward compatibility, but since all NKE and FS kext's have to be updated to the kpi's I don't know who that compatibility would be for. The 10.3 and earlier style of kernel locking is outlined here... -Shawn _______________________________________________ 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... This email sent to site_archiver@lists.apple.com On Apr 30, 2005, at 9:34 PM, Brian Bergstrand wrote: On Apr 30, 2005, at 7:39 PM, Bijoy Thomas wrote: Note that compatibility libraries exist that you can link against (com.apple.kernel.*) if you are not KPI ready. I believe if you are using the compatibility libraries you cannot link against the KPI libraries and vice versa. <http://developer.apple.com/technotes/tn/ tn2028.html#MacOSXKernelThreading> It hasn't been updated for Tiger yet which as Brian noted has much finer grain locking in the BSD side of the kernel (IOKit already had good locking and concurrency support). smime.p7s