Date: Fri, 16 Mar 2001 07:28:33 -0800 (PST) From: Matthew Jacob <mjacob@feral.com> To: Benno Rice <benno@FreeBSD.ORG> Cc: Doug Rabson <dfr@nlsystems.com>, John Baldwin <jhb@FreeBSD.ORG>, arch@FreeBSD.ORG Subject: Re: Proposal for the CPU interrupt API Message-ID: <Pine.BSF.4.21.0103160726160.53255-100000@beppo.feral.com> In-Reply-To: <20010316220848.A30533@rafe.jeamland.net>
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> > > > (in the PPC architecture I believe that page faults are interrupts) > > Not quite. Page faults and external interrupts are both classed as > 'exceptions'. External interrupts however can be turned on or off using the > EE bit of the machine state register without disabling page fault (DSI or ISI) > exceptions. Ah! Thanks for the clarification. What I had gotten my notion from was from AIX- if you have a spinlock contested and take a page fault in the kernel, you lock up. -matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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