Date: Tue, 26 Jun 2001 23:52:52 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org Subject: RE: cvs commit: src/sys/kern kern_exit.c Message-ID: <XFMail.010626235252.jhb@FreeBSD.org> In-Reply-To: <200106270615.f5R6Fij39009@freefall.freebsd.org>
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On 27-Jun-01 John Baldwin wrote: > jhb 2001/06/26 23:15:44 PDT > > Modified files: > sys/kern kern_exit.c > Log: > ... > - When a kthread exits, do a wakeup() on its proc pointers. This can be > used by kernel modules that have kthreads and want to ensure they have > safely exited before completely the MOD_UNLOAD event. For an example of how to use this, see my crash kernel module at http://www.FreeBSD.org/~jhb/crash/ Note that you need to use a lock to protect signaling the kthread that it needs to die and then msleep on that lock when sleep'ing on the kthread proc * to avoid missing the wakeup from the kthread when it dies. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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