From: Dan Cross <cross@math.psu.edu>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] page fault with lock held
Date: Wed, 13 Apr 2005 17:09:49 -0400 [thread overview]
Message-ID: <200504132109.j3DL9nJ18827@augusta.math.psu.edu> (raw)
In-Reply-To: Your message of "Wed, 13 Apr 2005 08:48:56 -1000." <Pine.BSI.4.61.0504130846240.5044@malasada.lava.net>
Tim Newsham <newsham@lava.net> writes:
> > I like the idea of having a way to hook into the bottom of sd from user
> > land!
>
> What about the /dev/sd??/raw file? For scsi devices at least (sdscsi.c)
> this calls through to scsirio which directly performs a scsi operation.
Isn't that pushing the protocol the opposite direction?
You want a way to tell the kernel, ``here's a file descriptor to a SCSI
device; talk to it and hook it into devsd.'' Not to send a SCSI
command to an existing device that already appears under
/dev/sdwhatever.
- Dan C.
next prev parent reply other threads:[~2005-04-13 21:09 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-12 17:13 Sam
2005-04-12 17:28 ` jmk
2005-04-12 17:31 ` Russ Cox
2005-04-12 17:37 ` Brantley Coile
[not found] ` <154c5e08c9c69f0f288db9ae8050a015@coraid.com>
2005-04-12 17:47 ` Russ Cox
2005-04-12 17:48 ` Charles Forsyth
2005-04-12 18:23 ` Sam
2005-04-12 20:33 ` geoff
2005-04-12 20:41 ` Dan Cross
2005-04-12 20:58 ` Russ Cox
2005-04-13 13:13 ` Dan Cross
2005-04-13 13:20 ` Brantley Coile
2005-04-13 18:48 ` Tim Newsham
2005-04-13 21:09 ` Dan Cross [this message]
2005-04-12 22:07 ` Christopher Nielsen
2005-04-12 22:57 ` Brantley Coile
2005-04-13 7:46 ` Charles Forsyth
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