Hi Stephen, > Hi, > Reviewed-by: Andrea Cervesato <andrea.cervesato@suse.com> Reviewed-by: Petr Vorel <pvorel@suse.cz> Out of curiosity I wonder how you achieve the clash. I was not able to, when running many processes long time enough: ./mq_notify01 -i 200000 & ./mq_notify01 -i 200000 & ... Kind regards, Petr