Re: cvs commit: src/sys/kern kern_exit.c kern_sig.c

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Matthew Dillon wrote:
>   Log:
>   Move the P_WEXIT check from lwpsignal() to kern_kill().  That is, disallow
>   signals to exiting processes but allow signals to threads that have not gone
>   through the exit interlock yet.  This allows exit1() to interlock the process
>   and still signal its LWPs.
>   
>   Fix a bug in exit1() which was improperly using lwp_signotify() to wake up
>   LWPs to force the to exit.  This function is basically a NOP if there are
>   no signals pending to the LWP.  Send a real SIGKILL to the LWP instead.

Could you explain how this happens?  lwp_signotify() wakes up/interrupts/schedules the thread.

cheers
 simon

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