Date: Tue, 21 Mar 1995 15:29:41 +1000 From: Bruce Evans <bde@zeta.org.au> To: current@FreeBSD.org, se@MI.Uni-Koeln.DE Subject: Re: Sharing interrupts with PCI devices? Message-ID: <199503210529.PAA04875@godzilla.zeta.org.au>
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>This results in low overhead operation >in the non shared case, and in interrupts >masked for as short a period of time as >possible in the shared case. >*** *** *** *** *** *** *** *** *** *** *** >I will apply the PCI SHARED INTERRUPT patch >tomorrow. All PCI device drivers will have >been checked to conform to the return value >convention described above ! This results in a higher overhead operation in the non-shared case :-]. What about generic drivers like isa/bt742a.c? Does the new requirement give higher overhead in the non-shared ISA (VLB) case? The overheads are relatively _very_ small for devices that transfer large blocks so I'm not worried about the overheads for bt742a. Bruce
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