Messages in this thread | | | From | Keith Owens <> | Subject | Re: Notifier chains are unsafe | Date | Wed, 02 Nov 2005 20:50:11 +1100 |
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On Tue, 1 Nov 2005 16:20:43 -0500 (EST), Alan Stern <stern@rowland.harvard.edu> wrote: >You mean the RCU-style update? It will hang when a callout routine tries >to deregister itself as it is running, although we could add a new >unregister_self API to handle that. Just check for num_callers equal to 1 >instead of 0.
A callout on an atomic notifer chain has no business calling the register/unregister functions. It makes no sense for an atomic context to call a routine that can sleep or block.
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