Date: Sat, 21 Aug 2004 11:25:18 -0700 From: Nate Lawson <nate@root.org> To: =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/acpica acpi_resource.c Message-ID: <4127938E.5050004@root.org> In-Reply-To: <xzpy8k8sdtu.fsf@dwp.des.no> References: <200408201652.i7KGqiRb030057@repoman.freebsd.org> <xzpy8k8sdtu.fsf@dwp.des.no>
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Dag-Erling Smørgrav wrote: > Nate Lawson <njl@FreeBSD.org> writes: > >> "Loop through all current resources to see if the new one overlaps >> any existing ones. If so, the old one always takes precedence and >> the new one is adjusted (or rejected). We check for three cases: >> >> 1. Tail of new resource overlaps head of old resource: truncate the >> new resource so it is contiguous with the start of the old. >> 2. New resource wholly contained within the old resource: error. >> 3. Head of new resource overlaps tail of old resource: truncate the >> new resource so it is contiguous, following the old." > > > What about the fourth case: new resource wholly contains old resource? For this code, the new resource's tail is truncated. That case didn't need to be handled for intra-device resources. However, I've found a system that has 2 separate sysresource devices with overlapping resources and that requires a bit larger change, unfortunately. -- Nate
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