Date: Wed, 15 Apr 2009 13:36:30 -0700 From: Marcel Moolenaar <xcllnt@mac.com> To: John Baldwin <jhb@freebsd.org> Cc: arch@freebsd.org Subject: Re: Enabling interrupt filters by default Message-ID: <A3D36F50-C823-41CB-9681-7C87A9BCDFDE@mac.com> In-Reply-To: <200904151613.50568.jhb@freebsd.org> References: <200904151324.06754.jhb@freebsd.org> <16C23095-4023-499D-896C-8A7A478FDCE4@mac.com> <200904151613.50568.jhb@freebsd.org>
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On Apr 15, 2009, at 1:13 PM, John Baldwin wrote: > On Wednesday 15 April 2009 2:04:14 pm Marcel Moolenaar wrote: >> >> On Apr 15, 2009, at 10:24 AM, John Baldwin wrote: >> >>> A while ago I changed the interrupt code in 8.x such that all the MD >>> code was >>> the same for both the INTR_FILTER and non-INTR_FILTER case. I would >>> like to >>> flip the switch to enable INTR_FILTER by default. Any objections? >> >> Last time it was found to be not working. Did we fix it? > > Err, when was that? August 2007. > I know folks have used it on amd64 and i386 ok and I have > tested it on both of those platforms. One of the arm kernel configs > uses it > by default. There was interrupt starvation on sparc64. There were also issues with permanently masking stray interrupts. This is problematic when interrupts are shared and there is at least 1 filter on it. FYI, -- Marcel Moolenaar xcllnt@mac.com
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