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SubjectRe: [BusyBox] [Fwd: Loopback device setup?]
Thanks to all who responded.  I have a 2.4.20 kernel so mounting on the 
tmpfs is not supported. I have found an alternative by using the ram
device nodes for storage.

Thanks again,

Tom

Hugh Dickins wrote:
> On Tue, 17 Feb 2004, vda wrote:
>
>>On Tuesday 17 February 2004 02:20, Tom Guilliams wrote:
>>
>>>in /driver/block/loop.c -
>>>
>>>loop_set_fd()
>>>
>>> /*
>>> * If we can't read - sorry. If we only can't write -
>>> * well, it's going to be read-only.
>>> */
>>> if (!aops->readpage)
>>> goto out_putf;
>>>
>>>I confirmed the "if (!aops->readpage)" is true. I'm not sure what the
>>>readpage routine is trying to do (which dev or file) in my command below -
>>># mount -t ext2 -o loop ramdisk.image rootfs
>>>
>>>Anyone have any thoughts?? This is all being done in the /tmp
>>>dircectory which is mounted as "tmpfs". Not sure if that has anything
>>>to do with it.
>>
>>I recall that tmpfs cannot do readpage (by design?).
>>CCing LKML, maybe someone will pour in more info.
>
>
> readpage is not straightforward for tmpfs, so it took a long time
> to be added, but tmpfs has supported loop since 2.4.22 and 2.5.45.
>
> Hugh
>
>
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