Date: Sun, 12 Dec 1999 08:08:20 -0500 From: "Daniel M. Eischen" <eischen@vigrid.com> To: Julian Elischer <julian@whistle.com>, arch@freebsd.org Subject: Re: Recent face to face threads talks. Message-ID: <38539E44.537A57E@vigrid.com> References: <Pine.BSF.4.10.9912112354520.26823-100000@current1.whistle.com> <38539C2B.9632089A@vigrid.com>
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I should caffeinate before reading Email! "Daniel M. Eischen" wrote: > Yes, we can pass the trapframe/context of a preempted or unblocked thread > out to the upcall handler and not have to use a different call-gate. > One advantage of another call-gate could be faster access to the > unblocked thread. In order for the UTS to locate an unblocked thread > from the information provided in the upcall, the UTS has to walk the > unblocked thread list looking for the KSE ID. If you use another ^^^^^^^^^ blocked > syscall-gate and provide the address of an IOCB, the address of the > IOCB can be given to the blocked upcall handler. The UTS can then > place the pointer to the thread struct in the IOCB. When the thread > unblocks, the address of the IOCB is provided to the upcall handler > and the UTS can just dereference it to find the thread struct. > > Dan Eischen > eischen@vigrid.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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