Date: Thu, 22 Aug 2002 22:27:20 +0800 From: "kai ouyang" <oykai@msn.com> To: freebsd-current@FreeBSD.ORG Subject: how to use the Giant? Message-ID: <F21y5KINzq6xEfhzL1f00015def@hotmail.com>
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Hi everyone, I find many system call under the control of Giant mutex, I do not know when we should call mtx_lock(&Giant) and mtx_unlock(&Giant). I only know it is a global mutex. normally, the two functions will occure together. But, in the /sys/dev/aac/aac.c aac_host_command(struct aac_softc *sc), before kthread_exit, it only calls the mtx_lock(&Giant). If I also write one kernel thread program, should I use the Giant? Thank you! Best Regards Ouyang Kai _________________________________________________________________ 与联机的朋友进行交流，请使用 MSN Messenger: http://messenger.microsoft.com/cn/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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