Date: Fri, 4 Feb 2005 14:53:56 -0500 From: John Baldwin <jhb@FreeBSD.org> To: David Malone <dwmalone@maths.tcd.ie> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/i386/isa clock.c Message-ID: <200502041453.56421.jhb@FreeBSD.org> In-Reply-To: <20050204101033.GA35920@walton.maths.tcd.ie> References: <200502031906.j13J63fl055269@repoman.freebsd.org> <20050204101033.GA35920@walton.maths.tcd.ie>
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On Friday 04 February 2005 05:10 am, David Malone wrote: > On Thu, Feb 03, 2005 at 07:06:03PM +0000, John Baldwin wrote: > > Log: > > Anytime we write to the RTC's status B register to possibly enable > > interrupts, read from the interrupt status register to clear any > > pending interrupts. Otherwise in some rare cases the RTC would never > > fire any interrupts as it constantly thinks it has an interrupt pending. > > Do you think there's any link between this and the occasional > problems people have reported over the years where the RTC stops > firing and they stop getting CPU usage stats? I'm not sure. The part of this patch that was in PR 17800 didn't fix another PR I didn't list on boxes where the clock does go away. According to that PR running 'date' to set the date and time turns the interrupt back on though. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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