Date: Tue, 25 May 2010 21:52:07 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Matthew Jacob <mj@feral.com>, freebsd-scsi@freebsd.org Subject: Re: patches for CAM SCSI probing, etc. Message-ID: <4BFC1C57.4080703@FreeBSD.org> In-Reply-To: <mailpost.1274804732.4568033.10040.mailing.freebsd.scsi@FreeBSD.cs.nctu.edu.tw> References: <4BFB3985.1030301@FreeBSD.org> <mailpost.1274804732.4568033.10040.mailing.freebsd.scsi@FreeBSD.cs.nctu.edu.tw>
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Matthew Jacob wrote: > Part of the reason I went the way you had done for ATA is to try and > guarantee one and one only probe action at a time per nexus. But in ATA I am restarting probe from the begining when new request arrive. Look on "softc->restart". >> you are slightly changing semantics of device probe. Previously, probe >> call means warranty that device will be probed from the beginning after >> the moment of request. It is very important for ATA, as probe function >> also initializes device, that is mandatory if probe is called as result >> of device reset. SCSI devices probably don't need that initialization, >> but what if probe was called due to inquiry change status received >> during probe sequence running? Are you sure you won't loose events here? -- Alexander Motin
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