Date: Mon, 18 May 1998 17:02:44 +0200 (MET DST) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: hasty@rah.star-gate.com (Amancio Hasty) Cc: regnauld@deepo.prosa.dk, current@FreeBSD.ORG Subject: Re: ATAPI CDDA Extraction under FreeBSD Message-ID: <199805181502.RAA07289@labinfo.iet.unipi.it> In-Reply-To: <199805181636.JAA04038@rah.star-gate.com> from "Amancio Hasty" at May 18, 98 09:35:44 am
next in thread | previous in thread | raw e-mail | index | archive | help
> How many outstanding dma requests can the IDE bus handle? we are doing programmed i/o at least on 2.2.X > For instance do you expect to be able to read audio CDs while > doing heavy i/o on the IDE disks? I have no idea if there is any fairness policy in handling multiple peripherals on the IDE bus (is there one for SCSI peripherals, BTW ?) I am asking because at least for accessing files on the same disk it is quite easy for a process (even a non privileged one i'd say) to completely starve others. cheers kyufu (which is luigi typed one position to the left... ) -----------------------------+-------------------------------------- Luigi Rizzo | Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it | Universita' di Pisa tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ _____________________________|______________________________________ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199805181502.RAA07289>