* Re: [uml-devel] uml-patch-2.4.20-7
[not found] ` <3F512995.4050209@vgertech.com>
@ 2003-09-02 19:00 ` Jeff Dike
2003-09-03 15:45 ` Matt Zimmerman
0 siblings, 1 reply; 4+ messages in thread
From: Jeff Dike @ 2003-09-02 19:00 UTC (permalink / raw)
To: Nuno Silva; +Cc: user-mode-linux-devel
nuno.silva@vgertech.com said:
> Can you give us a brief explanation on what this does? :)
It's not useful at the moment.
It's to support the standalone COW driver when I get around to finishing it.
You will set up a COW file on the command line like
cow0=/dev/ubd1,/dev/ubd0 ubd0=backing-file ubd1=cow-file
Since I can't break the existing
ubdx=cow-file,backing-file
syntax, that will need to continue to be supported.
This causes a problem with ubd1=cow-file in the first example. As the ubd
driver is currently written, this will cause ubd1 to be effectively
ubd1=cow-file,backing-file
because it will read the backing file from the COW header.
With the standalone COW driver, this is undesirable. We want ubd1 to not
be interpretted as a COW file since cow0 will be doing that.
So, the best thing I could think of was to make you specify ubd1 as
ubd1d=cow-file
which says 'this is just blocks of data, even though it looks like a COW file'.
This is non-optimal since the common case in the long run (standalone COW)
should be easy and not require any special extra crap, but I don't see a
way of doing that without breaking everyone's scripts.
Jeff
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [uml-devel] uml-patch-2.4.20-7
2003-09-02 19:00 ` [uml-devel] uml-patch-2.4.20-7 Jeff Dike
@ 2003-09-03 15:45 ` Matt Zimmerman
2003-09-04 2:30 ` Jeff Dike
0 siblings, 1 reply; 4+ messages in thread
From: Matt Zimmerman @ 2003-09-03 15:45 UTC (permalink / raw)
To: user-mode-linux-devel
On Tue, Sep 02, 2003 at 03:00:34PM -0400, Jeff Dike wrote:
> Since I can't break the existing
> ubdx=cow-file,backing-file
> syntax, that will need to continue to be supported.
Maybe it wouldn't be so bad to break the existing
ubdx=cow-file
syntax, though?
--
- mdz
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [uml-devel] uml-patch-2.4.20-7
2003-09-03 15:45 ` Matt Zimmerman
@ 2003-09-04 2:30 ` Jeff Dike
2003-09-04 3:15 ` Matt Zimmerman
0 siblings, 1 reply; 4+ messages in thread
From: Jeff Dike @ 2003-09-04 2:30 UTC (permalink / raw)
To: Matt Zimmerman; +Cc: user-mode-linux-devel
mdz@debian.org said:
> Maybe it wouldn't be so bad to break the existing
> ubdx=cow-file
> syntax, though?
Dunno, how do I go about figuring out how bad that is?
Jeff
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [uml-devel] uml-patch-2.4.20-7
2003-09-04 2:30 ` Jeff Dike
@ 2003-09-04 3:15 ` Matt Zimmerman
0 siblings, 0 replies; 4+ messages in thread
From: Matt Zimmerman @ 2003-09-04 3:15 UTC (permalink / raw)
To: user-mode-linux-devel
On Wed, Sep 03, 2003 at 10:30:11PM -0400, Jeff Dike wrote:
> mdz@debian.org said:
> > Maybe it wouldn't be so bad to break the existing
> > ubdx=cow-file
> > syntax, though?
>
> Dunno, how do I go about figuring out how bad that is?
Float it on the mailing list, I guess...
*waits*
I don't hear any screaming so far. :-)
(I don't use that syntax, personally)
--
- mdz
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2003-09-04 3:15 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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[not found] <200308071929.h77JTo5N017958@uml.karaya.com>
[not found] ` <3F512995.4050209@vgertech.com>
2003-09-02 19:00 ` [uml-devel] uml-patch-2.4.20-7 Jeff Dike
2003-09-03 15:45 ` Matt Zimmerman
2003-09-04 2:30 ` Jeff Dike
2003-09-04 3:15 ` Matt Zimmerman
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