Date: Sun, 12 Mar 1995 17:19:14 +1000 From: Bruce Evans <bde@zeta.org.au> To: phk@ref.tfs.com, rgrimes@gndrsh.aac.dev.com Cc: freebsd-hackers@FreeBSD.org, steve2@genesis.tiac.net Subject: Re: configuring 2 Ultrastore U24F cards in 1 system Message-ID: <199503120719.RAA06823@godzilla.zeta.org.au>
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>> LKM's are working in 2.0, they have been used mostly for file systems >> and some of the networking code. There currently are no LKM device >> drivers and more work must be done to the device driver layer before >> it is reasonable to start doing LKM device drivers. >With the modification that it is almost no problem to do it for a scsi- >driver since the problem really is cdevsw/bdevsw... The main problem is that device drivers think that they own the machine and do things like DELAY(1000000 * SCSI_DELAY) (busy wait for a GENERIC value of 15 seconds for each controller) and would probably have many races if they gave up control. Bruce
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