Date: Fri, 31 May 2002 09:23:48 -0400 From: Bosko Milekic <bmilekic@unixdaemons.com> To: Aaro J Koskinen <akoskine@cc.helsinki.fi> Cc: freebsd-hackers@FreeBSD.ORG, freebsd-smp@FreeBSD.ORG Subject: Re: ICU_LEN with IO APIC Message-ID: <20020531092348.B69469@unixdaemons.com> In-Reply-To: <Pine.OSF.4.30.0205311112190.30721-100000@sirppi.helsinki.fi>; from akoskine@cc.helsinki.fi on Fri, May 31, 2002 at 12:12:00PM %2B0300 References: <Pine.OSF.4.30.0205311112190.30721-100000@sirppi.helsinki.fi>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, May 31, 2002 at 12:12:00PM +0300, Aaro J Koskinen wrote: > Hello, > > Is there any particular reason why the number of interrupts is limited > to 32 on APIC systems? Is it just a conservative guess on the number of > interrupts anyone might want to need...? I'm not sure but perhaps this is historical (and now also required again), but if we use a word to mask out interrupts than after 32 we run out of bits. "Who needs more than 32 interrupts anyway?!" :-) > A. > > -- > Aaro Koskinen > E-mail: aaro@iki.fi "I'm the ocean, I'm the giant undertow." > http://www.iki.fi/aaro Regards, -- Bosko Milekic bmilekic@unixdaemons.com bmilekic@FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020531092348.B69469>