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Date: Tue, 12 Sep 2006 12:32:25 -0700 (PDT)
From: "R. B. Riddick" <arne_woerner@yahoo.com>
To: Ulf Lilleengen <lulf@stud.ntnu.no>
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Cc: freebsd-geom@freebsd.org
Subject: Re: gvinum raid5 in production
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--- Ulf Lilleengen <lulf@stud.ntnu.no> wrote:
> > As far as I understood GEOM it does not like to sleep in g_up or g_down
> > threads... So we cannot use M_WAITOK in gv_down()...
> What do you mean gv_down()? Gvinum does not use g_up or g_down as far as i
> can tell?
> 
Ohoh... Tubby "typo"...

"gv_down" is wrong... I meant "gv_drive_done()"

As far as I understood GEOM it work as follows:
1. A geom class provides a drive and several functions, that r needed to
operate that drive...
2. Thread g_down hands down a new read/write/... request to an instance of a
geom class by using those functions (often called: ..._start())
3. Thread g_up hands up a completed/aborted request to the caller (a geom or
so) by using those functions (often called: ..._done())

It is a little bit like "function overloading" in OO...

-Arne

---
Arne likes Teletubbies...

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