Date: Wed, 4 Nov 1998 18:31:22 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: Etienne.Debruin@KryptoKom.DE (Etienne de Bruin) Cc: freebsd-hackers@FreeBSD.ORG, questions@FreeBSD.ORG Subject: Re: waiting in device driver Message-ID: <199811041831.LAA09360@usr07.primenet.com> In-Reply-To: <199811041416.PAA04355@borg.kryptokom.de> from "Etienne de Bruin" at Nov 4, 98 03:16:24 pm
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> which is the best way to wait for the DMA routines of a card to complete? > should one go in a while loop and test a flag (which gets set by the > interrupt handler once completed) or should i go for the tsleep option? Use tsleep. You do not want to buzz-loop on a condition variable, since it would prevent the processor from doing other useful work while your device was busy. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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