Date: Thu, 23 Mar 2000 01:31:24 -0700 (MST) From: Nate Williams <nate@yogotech.com> To: robert@braingarage.com Cc: freebsd-mobile@FreeBSD.ORG Subject: Re: polling vs irq for pcic Message-ID: <200003230831.BAA01265@nomad.yogotech.com> In-Reply-To: <200003230813.AAA02526@smartie.braingarage.com> References: <200003230813.AAA02526@smartie.braingarage.com>
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> When I first set up my 4.0 machine, I installed with the > default kernel and it didn't notice when the card was > removed. I have seen a few posts on this subject, so I > recompiled the kernel with only "device pcic0" and > nothing else. Now it works great. My question is this - > are there any advantages/disadvantages to compiling it > like this? Well, there is the obvious advantage in that it works. Another advantage is that you don't 'waste' an precious IRQ resource, which are rather hard to come by on newer laptops. Now, the disadvantages are that 'hot' card insertion/removal is *much* more likely to hang your system. If you don't hot-swap your cards much, or you do it in a very 'safe' manner, then polling (no IRQ assigned) is pretty safe. Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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