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SubjectRe: Dummy network device
Randy.Dunlap wrote:

>| From: Rick Knight
>|
>| David S. Miller wrote:
>|
>| >On Tue, 09 Mar 2004 15:11:48 -0800
>| >Rick Knight <rick@rlknight.com> wrote:
>| >
>| >
>| >
>| >>I found the answer. From the archive. Decided to look at dummy.c and
>| >>numdummies=1, changed it to numdummies=3 and rebuilt that module. Works
>| >>like a charm.
>| >>
>| >>Question/Suggestion, couldn't this be made an option at configuration?
>| >>Kind of like number_of_ptys=256.
>| >>
>| >>
>| >
>| >Specify "numdummies=3" on the module load command line.
>| >
>| >
>| >It's supposed to be changeable at module load time, without
>| >rebuilding it. Try this e.g.:
>| >
>| >modprobe dummy numdummies=4
>| >
>| >--
>| >~Randy
>| >
>| >
>| Randy, David,
>|
>| Thanks for the replies.
>|
>| I did try 'modprobe dummy numdummies=3', however, I didn't quote
>| numdummies=3. Are the quote required? Is there a modprobe.conf option?
>| Probably "options dummy "numdummies=3".
>
>No, the quotes are not required. This works for me:
>modprobe dummy numdummies=3
>
>Using /etc/modprobe.conf also works, as you suggested, but without
>the quotation marks:
>options dummy numdummies=3
>
>Either way shows this in /proc/net/dev:
>
>dummy0: 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0
>dummy1: 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0
>dummy2: 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0
>
>
>HTH.
>--
>~Randy
>
>
Randy,

I did try 'modprobe dummy numdummies=3' and I didn't work. I got an
error and the following showed up in /var/log/messages...

Mar 9 14:42:33 l43w2k021 modprobe: FATAL: Error inserting dummy
(/lib/modules/2.6.3/kernel/drivers/net/dummy.ko): Unknown symbol in
module, or unknown parameter (see dmesg)

Now it works and I get no error message. I tried numdummies= on another
similarly configured machine and it worked first time. So maybe the
error message above was caused by a typo when I tried it the first time

Anyway, numdummies= does work as you said.

Thanks,
Rick Knight
(rick@rlknight.com)

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