This is errors-in-msg_receive in view mode; [Up]
Date: Sun 26-Dec-1989 18:58:32 From: Richard.Draves@CS.CMU.EDU Subject: errors in msg_receive I'm trying to figure out what is the best course of action when an error occurs during a msg_receive. There are basically two sorts of possible errors. First, there might be a kernel resource shortage. When the kernel tries to move some port rights from the message to the receiving task, or move some out-of-line memory into the receiver's address space, it could find itself unable to allocate a necessary data structure. Mach doesn't have resource quotas on the VM or IPC data structures, but if it did, exceeding them would cause a similar situation. Second, there might be a more abstract resource problem. The receiver's address space might not have room for the out-of-line memory (quite possible for some applications), or there might not be an available name for a new port right (not bloody likely). I would like to hear from writers of serious, robust applications what kind of error recovery they would find useful. Thanks, Rich
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