Date: Mon, 06 Apr 2009 19:11:58 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: freebsd-current@freebsd.org Subject: Re: ichwd: option to globally disable SMI Message-ID: <49DA29CE.3070801@icyb.net.ua> In-Reply-To: <31158.1239033885@critter.freebsd.dk> References: <31158.1239033885@critter.freebsd.dk>
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on 06/04/2009 19:04 Poul-Henning Kamp said the following: > In message <49DA1173.1080606@icyb.net.ua>, Andriy Gapon writes: > >> I am attaching a patch that makes ichwd check and report result of SMI bit >> operations and also try to disable SMI globally if permitted by >> hw.ichwd.use_global_smi tunable. > > Disabling SMI globally is incredibly ill-advised, for one thing it > may cause your laptop to autowarnerize, but it can also ruin your > batteries, prevent ACPI from working etc. > > Under no circumstances should FreeBSD attempt to disable SMI globally > without explicit instruction from a knowledgeable and informed user. > Well, this is a mistake on my part, I am using ichwd on a desktop and so I completely missed the fact that somebody might think of trying this on a laptop. Thank you for this prominent warning. In any case, a user has first to apply the patch, set hw.ichwd.use_global_smi tunable and the normal way of disabling TCO SMI should fail in order for global SMI disabling to be attempted. -- Andriy Gapon
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