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[ts-7000] Re: How to use tmpfs on TS-Linux?

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Subject: [ts-7000] Re: How to use tmpfs on TS-Linux?
From: "Mike Dodd" <>
Date: Wed, 12 Oct 2005 16:43:17 -0000
>> Still trying to figure out how to make a RAM filesystem, I have a
>> question about tmpfs. Is this enabled in the TS-Linux kernel, and
>> how do I use it?
>>
>> According to info I found on the Web, tmpfs is part of the 2.4 kernel,
>> and I should be able to mount it with:
>>   mount tmpfs /mnt/tmpfs -t tmpfs

> Mike, it depends whether the kernel was built with that option, or if it
> is available as a module.

How can I find out? Since the Technologic document specifically
mentions tmpfs, I logically assumed the kernel would have that ability.

> What have you done to create a ramdisk?

Nothing.

> There should be a device /dev/ram

There is not.

> Ram disk size is a preset in the kernel - usually 4MB
> You need to build a filesystem on /dev/ram, so e.g.
>  mkfs -t ext2 /dev/ram
> [...]
>  mount -t ext2 /dev/ram /mnt

According to Google searches, tmpfs is part of the 2.4 kernel (i.e.,
it's virtual memory), and there is no need to create a ramdisk. My
understanding is that tmpfs is used INSTEAD OF a ramdisk for a
temporary filesystem. Everything I read says this specifically.

(BTW, I tried 'mount tmpfs /mnt/tmpfs -t tmpfs' on my SUSE Linux
server with a 2.4 kernel, and it did mount as expected, and I could
write files to it and read them back. In other words, it worked
exactly like the Google searches indicated, and I didn't have to
create a ramdrive.)

Assuming tmpfs _is_ in the TS-Linux 2.4 kernel, but requires a kernel
option at boot-time to enable it, how do I pass such an option to the
kernel?

Thanks again for any and all advice. The Technologic documentation is
sorely lacking in this regard.

Mike







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