Date: Thu, 29 Jan 2009 13:55:05 +0100 From: Ed Schouten <ed@80386.nl> To: Andriy Gapon <avg@icyb.net.ua> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: INTR_FILTER? Message-ID: <20090129125505.GA17198@hoeg.nl> In-Reply-To: <49819757.2010002@icyb.net.ua> References: <49819757.2010002@icyb.net.ua>
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--LMmSgwdUwKH/sMG1 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Andriy Gapon <avg@icyb.net.ua> wrote: > INTR_FILTER - what does it do? > It doesn't seem to be documented anywhere, but seems to affect interrupt > code. Not sure, but I think I was once told that FreeBSD has a `two level' interrupt handling scheme, where the filter is invoked directly to only figure out whether the interrupt is spurious or not. After it has been determined it is not, an interrupt thread is scheduled to handle the interrupt. But as I said, I'm not sure. :-) --=20 Ed Schouten <ed@80386.nl> WWW: http://80386.nl/ --LMmSgwdUwKH/sMG1 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAkmBpykACgkQ52SDGA2eCwVEQgCePBmjmPjcWwRG5VXmgs9Iew8p 5PMAn2uBafUEokC+O6zC1v6VRs3+L298 =DZxu -----END PGP SIGNATURE----- --LMmSgwdUwKH/sMG1--
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